Claude Code · harness timeline

v2.1.237

Aug 20

trivial Aug 20, 2026

Version and session ID bump only

The billing header was updated to reflect the new version number (2.1.237) and a new prompt/session ID, and the ephemeral memory directory path changed to a new random temp folder. These are automated per-run substitutions with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.236 (external, sdk-cli) -> claude-cli/2.1.237 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.236 (external, sdk-cli)	claude-cli/2.1.237 (external, sdk-cli)

v2.1.236

Aug 20

trivial Aug 20, 2026

Version bump and session ID rotation

The billing header was updated to reflect the new version (2.1.236) and a fresh session/prompt ID, and the ephemeral memory directory path was rotated to a new temporary folder. These are automated housekeeping changes with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.235 (external, sdk-cli) -> claude-cli/2.1.236 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.235 (external, sdk-cli)	claude-cli/2.1.236 (external, sdk-cli)

v2.1.235

Aug 20

trivial Aug 20, 2026

Version and session ID bumps only

The billing header was updated to reflect the new version number (2.1.235) and its associated build hash and prompt ID. The ephemeral memory directory path was updated to a new temporary folder name, consistent with a fresh session environment. No behavioral or instructional content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.234 (external, sdk-cli) -> claude-cli/2.1.235 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.234 (external, sdk-cli)	claude-cli/2.1.235 (external, sdk-cli)

v2.1.234

Aug 20

minor Aug 20, 2026

Version bump and token budget added

The billing header was updated to reflect the new version (2.1.234) with a new prompt ID and content hash. The ephemeral memory path was rotated to a new temp directory. A `<total_tokens>` tag reporting 15,000,000 tokens remaining was appended to the prompt, likely to surface context budget information to the model.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+51 chars
Header / user_agentclaude-cli/2.1.233 (external, sdk-cli) -> claude-cli/2.1.234 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	9,272 chars	9,323 chars (+51)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+51 chars)
transportheader / user_agent	claude-cli/2.1.233 (external, sdk-cli)	claude-cli/2.1.234 (external, sdk-cli)

v2.1.233

Aug 20

trivial Aug 20, 2026

Version bump and session ID rotation

The billing header was updated to reflect the new version (2.1.233) and a new prompt/cache-hash ID, and the ephemeral memory directory path changed to a new temp folder name. These are automated session-scoped values with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.232 (external, sdk-cli) -> claude-cli/2.1.233 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.232 (external, sdk-cli)	claude-cli/2.1.233 (external, sdk-cli)

v2.1.232

Aug 20

trivial Aug 20, 2026

Version bump and session ID rotation

The billing header was updated to reflect the new version (2.1.232.b3c) and a new prompt/cache ID pair, and the ephemeral memory directory path was rotated to a new temp folder. These are routine per-session or per-build identifier changes with no semantic or behavioral difference.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / ListAgentsdescription +143 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.231 (external, sdk-cli) -> claude-cli/2.1.232 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsListAgents / description	previous description	description changed (+143 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.231 (external, sdk-cli)	claude-cli/2.1.232 (external, sdk-cli)

v2.1.231

Aug 20

trivial Aug 20, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.231.218) and a fresh prompt ID, and the ephemeral memory directory path was rotated to a new temporary folder. No behavioral or instructional content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.229 (external, sdk-cli) -> claude-cli/2.1.231 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.229 (external, sdk-cli)	claude-cli/2.1.231 (external, sdk-cli)

v2.1.229

Aug 20

trivial Aug 20, 2026

Version bump and session path update

The billing header was updated to reflect the new version (2.1.229) with a new prompt ID and cache hash. The ephemeral memory directory path was rotated to a new temporary session identifier, which is expected churn between runs.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Workflowdescription +5 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.228 (external, sdk-cli) -> claude-cli/2.1.229 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsWorkflow / description	previous description	description changed (+5 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.228 (external, sdk-cli)	claude-cli/2.1.229 (external, sdk-cli)

v2.1.228

Aug 20

trivial Aug 20, 2026

Version bump and session ID rotation

The billing header was updated to reflect the new version (2.1.228) with a fresh prompt ID and content hash. The ephemeral memory directory path was also rotated to a new temporary session identifier, consistent with a new runtime environment instance.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / ListAgentsdescription +72 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.227 (external, sdk-cli) -> claude-cli/2.1.228 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsListAgents / description	previous description	description changed (+72 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.227 (external, sdk-cli)	claude-cli/2.1.228 (external, sdk-cli)

v2.1.227

Aug 20

trivial Aug 20, 2026

Minor memory-section wording cleanup

The memory directory path was updated to a new temp session ID, and several small prose tweaks were made in the Memory section: an em-dash in the frontmatter description field was replaced with a comma, memory type labels switched from em-dash to colon style, and two run-on sentences were split into separate sentences. The billing header also reflects a new version hash and prompt ID.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription +94 chars
Tool schema / Agentschema changed
Prompt block / 0+51 chars
Prompt block / 3-7 chars
Header / user_agentclaude-cli/2.1.226 (external, sdk-cli) -> claude-cli/2.1.227 (external, sdk-cli)

Split-view diff6 fields changedprompts · 3tools · 1schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+94 chars)
schemasAgent	previous schema	updated schema
promptstotal prompt size	9,228 chars	9,272 chars (+44)
promptsblock 0	previous text	text changed (+51 chars)
promptsblock 3	previous text	text changed (-7 chars)
transportheader / user_agent	claude-cli/2.1.226 (external, sdk-cli)	claude-cli/2.1.227 (external, sdk-cli)

v2.1.226

Aug 20

trivial Aug 20, 2026

Version and session path bump

The billing header was updated to reflect the new version (2.1.226) and a new build hash, and the ephemeral memory directory path was rotated to a new temporary session identifier. No behavioral or semantic changes were introduced.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.225 (external, sdk-cli) -> claude-cli/2.1.226 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.225 (external, sdk-cli)	claude-cli/2.1.226 (external, sdk-cli)

v2.1.225

Aug 20

trivial Aug 20, 2026

Version bump and temp path update

The billing header was updated to reflect the new version (2.1.225) and a new build hash, and the ephemeral temp directory path for persistent memory was rotated to a new randomly-generated name. These are purely mechanical/environmental changes with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / ListAgentsdescription -102 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.224 (external, sdk-cli) -> claude-cli/2.1.225 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsListAgents / description	previous description	description changed (-102 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.224 (external, sdk-cli)	claude-cli/2.1.225 (external, sdk-cli)

v2.1.224

Aug 20

trivial Aug 20, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.224) and a new cache-control hash. The ephemeral memory directory path was rotated to a new temporary folder, which is expected churn from the sandboxed environment regenerating session state.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / ListAgentsnew tool description
Schema added / ListAgentsnew input schema
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.223 (external, sdk-cli) -> claude-cli/2.1.224 (external, sdk-cli)

Split-view diff5 fields changedtools · 2prompts · 2transport · 1

Field	Before	After
toolsListAgents	—	added
toolstool count	11	12
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.223 (external, sdk-cli)	claude-cli/2.1.224 (external, sdk-cli)

v2.1.223

Aug 20

trivial Aug 20, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.223) and a new build hash, and the ephemeral memory directory path was rotated to a new randomly-named temporary folder. Neither change affects documented behavior or capabilities.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.222 (external, sdk-cli) -> claude-cli/2.1.223 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.222 (external, sdk-cli)	claude-cli/2.1.223 (external, sdk-cli)

v2.1.222

Aug 20

trivial Aug 20, 2026

Version bump and temp path refresh

The billing header was updated to reflect the new version (2.1.222.209) and a new build hash, and the ephemeral memory directory path was rotated to a new temporary folder name. Neither change affects behavior or instructions in any meaningful way.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.221 (external, sdk-cli) -> claude-cli/2.1.222 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.221 (external, sdk-cli)	claude-cli/2.1.222 (external, sdk-cli)

v2.1.221

Aug 20

minor Aug 20, 2026

Fast mode drops Opus 4.7 support

The list of Claude Opus versions supporting Fast mode was trimmed from "Opus 5/4.8/4.7" to "Opus 5/4.8", removing the 4.7 reference. The memory path and billing header were also updated to reflect a new build/session, which carry no semantic meaning.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3-4 chars
Header / user_agentclaude-cli/2.1.220 (external, sdk-cli) -> claude-cli/2.1.221 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	9,232 chars	9,228 chars (-4)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (-4 chars)
transportheader / user_agent	claude-cli/2.1.220 (external, sdk-cli)	claude-cli/2.1.221 (external, sdk-cli)

v2.1.220

Aug 20

trivial Aug 20, 2026

Version bump and temp path update

The billing header was updated to reflect the new version (2.1.220) and a new build hash. The persistent memory directory path was rotated to a new temporary session identifier, which is a routine environment change with no behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.219 (external, sdk-cli) -> claude-cli/2.1.220 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.219 (external, sdk-cli)	claude-cli/2.1.220 (external, sdk-cli)

v2.1.219

Aug 20

major Aug 20, 2026

Major workflow and correction guidance added

Two substantial new sections — "Delivering work" and "Corrections" — were added, prescribing how the assistant should handle scope, ambiguity, mid-task uncertainty, user pushback, refusals, and self-correction. The running model was updated from Opus 4.8 to Opus 5 with a knowledge cutoff bump from January to May 2026. A sentence about checking target files before deleting or overwriting was removed from the safety policy, and the harness description of `<system-reminder>` tags was replaced with a broader explanation of mid-conversation system turns.

ModelPromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +62 chars
Tool description / Workflowdescription +273 chars
Prompt block / 0+0 chars
Prompt block / 2+58 chars
Prompt block / 3+3,255 chars
Model setting / modelclaude-opus-4-8 -> claude-opus-5
Header / user_agentclaude-cli/2.1.218 (external, sdk-cli) -> claude-cli/2.1.219 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff9 fields changedprompts · 4tools · 2transport · 2model · 1

Field	Before	After
toolsBash / description	previous description	description changed (+62 chars, +1 lines)
toolsWorkflow / description	previous description	description changed (+273 chars, +2 lines)
promptstotal prompt size	5,919 chars	9,232 chars (+3,313)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+58 chars)
promptsblock 3	previous text	text changed (+3,255 chars)
modelmodel	claude-opus-4-8	claude-opus-5
transportheader / user_agent	claude-cli/2.1.218 (external, sdk-cli)	claude-cli/2.1.219 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["fallback-credit-2026-06-01"], "removed": []}

v2.1.218

Aug 20

trivial Aug 20, 2026

Version and session path bump only

The billing header was updated to reflect the new version (2.1.218) and a new build hash, and the ephemeral session-specific memory directory path was rotated to a new temporary folder. No behavioral or policy changes were introduced.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Skilldescription +173 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.217 (external, sdk-cli) -> claude-cli/2.1.218 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsSkill / description	previous description	description changed (+173 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.217 (external, sdk-cli)	claude-cli/2.1.218 (external, sdk-cli)

v2.1.217

Aug 20

trivial Aug 20, 2026

Version bump and temp path update

The billing header version string was incremented from 2.1.216 to 2.1.217 with updated build hashes. The ephemeral memory directory path was updated to reflect a new temporary session identifier, which is a routine environmental change with no semantic impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Workflowdescription +15 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.216 (external, sdk-cli) -> claude-cli/2.1.217 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsWorkflow / description	previous description	description changed (+15 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.216 (external, sdk-cli)	claude-cli/2.1.217 (external, sdk-cli)

v2.1.216

Aug 20

trivial Aug 20, 2026

Version and session path token bump

The billing header was updated to reflect the new version string (2.1.216.4c6) and a refreshed cache hash. The ephemeral memory directory path was rotated to a new temporary session token, which is expected behavior for session-scoped environments.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Skilldescription -469 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.215 (external, sdk-cli) -> claude-cli/2.1.216 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsSkill / description	previous description	description changed (-469 chars, -11 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.215 (external, sdk-cli)	claude-cli/2.1.216 (external, sdk-cli)

v2.1.215

Aug 20

trivial Aug 20, 2026

Version bump and temp path refresh

The billing header was updated to reflect the new version (2.1.215) and a new build hash, and the ephemeral memory directory path was rotated to a new temporary directory. Neither change affects functional behavior or user-facing capabilities.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.214 (external, sdk-cli) -> claude-cli/2.1.215 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.214 (external, sdk-cli)	claude-cli/2.1.215 (external, sdk-cli)

v2.1.214

Aug 20

trivial Aug 20, 2026

Version bump and temp path update

The version header was incremented from 2.1.213 to 2.1.214 with an updated build hash. The persistent memory directory path was updated to reflect a new temporary session directory, which is expected churn between runs.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.213 (external, sdk-cli) -> claude-cli/2.1.214 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.213 (external, sdk-cli)	claude-cli/2.1.214 (external, sdk-cli)

v2.1.213

Aug 20

trivial Aug 20, 2026

Version bump and temp path refresh

The billing header was updated to reflect the new version (2.1.213) and a new build hash. The ephemeral memory directory path was also rotated to a new randomly-generated temp folder, which is an expected artifact of environment reinitialization rather than a deliberate behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.212 (external, sdk-cli) -> claude-cli/2.1.213 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.212 (external, sdk-cli)	claude-cli/2.1.213 (external, sdk-cli)

v2.1.212

Aug 20

trivial Aug 20, 2026

Version bump and temp path scrub

The billing header was updated to reflect the new version (2.1.212) and a new build hash. The persistent memory path was updated to a new temporary directory name, which is a routine environment-level change with no semantic impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / Agentschema changed
Tool schema / ReportFindingsschema changed
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.211 (external, sdk-cli) -> claude-cli/2.1.212 (external, sdk-cli)

Split-view diff5 fields changedschemas · 2prompts · 2transport · 1

Field	Before	After
schemasAgent	previous schema	updated schema
schemasReportFindings	previous schema	updated schema
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.211 (external, sdk-cli)	claude-cli/2.1.212 (external, sdk-cli)

v2.1.211

Aug 20

trivial Aug 20, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.211) and a refreshed build hash. The ephemeral temp directory path embedded in the memory section was rotated to a new random identifier, which is expected churn between runs and carries no semantic change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription +128 chars
Tool description / ScheduleWakeupdescription +463 chars
Tool schema / ScheduleWakeupproperties +noop
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.210 (external, sdk-cli) -> claude-cli/2.1.211 (external, sdk-cli)

Split-view diff6 fields changedtools · 2prompts · 2schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+128 chars)
toolsScheduleWakeup / description	previous description	description changed (+463 chars, +2 lines)
schemasScheduleWakeup	previous schema	now has: noop
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.210 (external, sdk-cli)	claude-cli/2.1.211 (external, sdk-cli)

v2.1.210

Jul 15

trivial Jul 15, 2026

Version and session path bump only

The billing header version string was updated from 2.1.209.419 to 2.1.210.18b with a new checksum, and the ephemeral memory directory path was rotated to a new randomly-generated session identifier. Neither change affects behavior or instructions.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Skilldescription +469 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.209 (external, sdk-cli) -> claude-cli/2.1.210 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsSkill / description	previous description	description changed (+469 chars, +11 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.209 (external, sdk-cli)	claude-cli/2.1.210 (external, sdk-cli)

v2.1.209

Jul 15

trivial Jul 15, 2026

Version bump and session path update

The billing header was updated to reflect the new version (2.1.209) and a new build hash. The persistent memory directory path was updated to a new temporary session identifier, which is a routine per-session value with no semantic change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Skilldescription -469 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.208 (external, sdk-cli) -> claude-cli/2.1.209 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsSkill / description	previous description	description changed (-469 chars, -11 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.208 (external, sdk-cli)	claude-cli/2.1.209 (external, sdk-cli)

v2.1.208

Jul 15

notable Jul 15, 2026

Adds gender-neutral pronoun policy

A new paragraph was added instructing the assistant to default to they/them pronouns for any person whose pronouns have not been explicitly stated, and to never infer pronouns from a name. This applies to all user-visible text, including visible thinking. The memory path was also updated to a new session-specific temp directory, and the billing header version was bumped.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+359 chars
Header / user_agentclaude-cli/2.1.207 (external, sdk-cli) -> claude-cli/2.1.208 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	5,560 chars	5,919 chars (+359)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+359 chars)
transportheader / user_agent	claude-cli/2.1.207 (external, sdk-cli)	claude-cli/2.1.208 (external, sdk-cli)

v2.1.207

Jul 15

trivial Jul 15, 2026

Session temp path and version bump

The billing header was updated to reflect the new version (2.1.207) and a new build hash, and the ephemeral memory directory path changed from `-tmp-tmp-mj4ag6eJfO` to `-tmp-tmp-XbqnPhoNNk`. Both changes are artifacts of a new session or build and carry no semantic difference.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / DeferredToolPlaceholdernew tool description
Schema added / DeferredToolPlaceholdernew input schema
Tool description / ScheduleWakeupdescription +30 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.206 (external, sdk-cli) -> claude-cli/2.1.207 (external, sdk-cli)

Split-view diff6 fields changedtools · 3prompts · 2transport · 1

Field	Before	After
toolsDeferredToolPlaceholder	—	added
toolsScheduleWakeup / description	previous description	description changed (+30 chars)
toolstool count	10	11
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.206 (external, sdk-cli)	claude-cli/2.1.207 (external, sdk-cli)

v2.1.206

Jul 15

trivial Jul 15, 2026

Version bump and temp path update

The billing header was updated to reflect the new version (2.1.206) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder, which is expected churn from session environment regeneration.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.205 (external, sdk-cli) -> claude-cli/2.1.206 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.205 (external, sdk-cli)	claude-cli/2.1.206 (external, sdk-cli)

v2.1.205

Jul 15

trivial Jul 15, 2026

Version bump and session path rotation

The billing header was updated from version 2.1.204 to 2.1.205 with a new build hash, and the ephemeral memory directory path was rotated to a new randomly-generated session identifier. These are routine per-session infrastructure changes with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.204 (external, sdk-cli) -> claude-cli/2.1.205 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.204 (external, sdk-cli)	claude-cli/2.1.205 (external, sdk-cli)

v2.1.204

Jul 15

trivial Jul 15, 2026

Version and session path bump only

The billing header was updated to reflect the new version number (2.1.204) and a refreshed build hash. The ephemeral memory directory path was rotated to a new temporary session identifier, which is expected behavior between runs.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.203 (external, sdk-cli) -> claude-cli/2.1.204 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.203 (external, sdk-cli)	claude-cli/2.1.204 (external, sdk-cli)

v2.1.203

Jul 15

trivial Jul 15, 2026

Version bump and temp path refresh

The billing header was updated to reflect the new version (2.1.203) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder name, which is expected churn for session-scoped environments.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.202 (external, sdk-cli) -> claude-cli/2.1.203 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.202 (external, sdk-cli)	claude-cli/2.1.203 (external, sdk-cli)

v2.1.202

Jul 15

trivial Jul 15, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.202) and a new content hash. The ephemeral memory directory path was rotated to a new randomly-generated temp folder name, which is expected behavior between sessions and carries no semantic change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / ScheduleWakeupdescription +101 chars
Tool schema / ScheduleWakeupproperties +stop / required changed
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.201 (external, sdk-cli) -> claude-cli/2.1.202 (external, sdk-cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsScheduleWakeup / description	previous description	description changed (+101 chars)
schemasScheduleWakeup	required list changed	now has: stop · required list changed
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.201 (external, sdk-cli)	claude-cli/2.1.202 (external, sdk-cli)

v2.1.201

Jul 15

trivial Jul 15, 2026

Version bump and temp path refresh

The billing header was updated to reflect the new version (2.1.201) and a new build hash. The ephemeral memory directory path was rotated to a new randomly-generated temp folder name, which is expected behavior for environment resets between runs.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.200 (external, sdk-cli) -> claude-cli/2.1.201 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.200 (external, sdk-cli)	claude-cli/2.1.201 (external, sdk-cli)

v2.1.200

Jul 15

trivial Jul 15, 2026

Version bump and session path update

The billing header version string was incremented from 2.1.199 to 2.1.200 and its cache hash updated. The persistent memory directory path was updated to reflect a new temporary session identifier, which is expected routine churn between sessions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.199 (external, sdk-cli) -> claude-cli/2.1.200 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.199 (external, sdk-cli)	claude-cli/2.1.200 (external, sdk-cli)

v2.1.199

Jul 15

trivial Jul 15, 2026

Version bump and temp path rotation

The billing header version string was incremented from 2.1.198 to 2.1.199 with an updated build hash. The ephemeral temporary directory path used for persistent file-based memory was rotated to a new random identifier, reflecting a fresh environment instance.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / ReportFindingsschema changed
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.198 (external, sdk-cli) -> claude-cli/2.1.199 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2schemas · 1transport · 1

Field	Before	After
schemasReportFindings	previous schema	updated schema
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.198 (external, sdk-cli)	claude-cli/2.1.199 (external, sdk-cli)

v2.1.198

Jul 15

trivial Jul 15, 2026

Version and session path bump only

The billing header was updated to reflect the new version number (2.1.198) and a new build hash. The persistent memory directory path was updated to a new temporary session identifier, which is a routine environment-specific change.

ModelPromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription +219 chars
Tool schema / Agentschema changed
Tool description / Skilldescription +469 chars
Tool description / Workflowdescription +217 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Model setting / thinking{"type": "adaptive"} -> {"display": "omitted", "type": "adaptive"}
Header / user_agentclaude-cli/2.1.197 (external, sdk-cli) -> claude-cli/2.1.198 (external, sdk-cli)

Split-view diff8 fields changedtools · 3prompts · 2schemas · 1model · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+219 chars, +1 lines)
schemasAgent	previous schema	updated schema
toolsSkill / description	previous description	description changed (+469 chars, +11 lines)
toolsWorkflow / description	previous description	description changed (+217 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
modelthinking	{"type": "adaptive"}	{"display": "omitted", "type": "adaptive"}
transportheader / user_agent	claude-cli/2.1.197 (external, sdk-cli)	claude-cli/2.1.198 (external, sdk-cli)

v2.1.197

Jul 15

notable Jul 15, 2026

Claude 5 family replaces Sonnet 4.6 listing

The enumerated list of recent Claude models was updated to introduce the "Claude 5 family" and replace Sonnet 4.6 with Sonnet 5 (`claude-sonnet-5`). The billing header and ephemeral memory path were also bumped to reflect the new build, which are routine session-scoped changes.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+7 chars
Header / user_agentclaude-cli/2.1.196 (external, sdk-cli) -> claude-cli/2.1.197 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	5,553 chars	5,560 chars (+7)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+7 chars)
transportheader / user_agent	claude-cli/2.1.196 (external, sdk-cli)	claude-cli/2.1.197 (external, sdk-cli)

v2.1.196

Jul 15

minor Jul 15, 2026

Fast mode drops Opus 4.6 support

The list of models supporting Fast mode was trimmed to remove Opus 4.6, leaving only Opus 4.8 and 4.7. The version header and ephemeral memory path were also updated to reflect the new build.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / ReportFindingsnew tool description
Schema added / ReportFindingsnew input schema
Tool description / Skilldescription -469 chars
Prompt block / 0+0 chars
Prompt block / 3-4 chars
Header / user_agentclaude-cli/2.1.195 (external, sdk-cli) -> claude-cli/2.1.196 (external, sdk-cli)

Split-view diff7 fields changedtools · 3prompts · 3transport · 1

Field	Before	After
toolsReportFindings	—	added
toolsSkill / description	previous description	description changed (-469 chars, -11 lines)
toolstool count	9	10
promptstotal prompt size	5,557 chars	5,553 chars (-4)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (-4 chars)
transportheader / user_agent	claude-cli/2.1.195 (external, sdk-cli)	claude-cli/2.1.196 (external, sdk-cli)

v2.1.195

Jul 15

trivial Jul 15, 2026

Version bump and session path update

The billing header version string was incremented from 2.1.193.101 to 2.1.195.325 and the session-specific temporary memory directory path was updated to a new randomly generated identifier. These are routine ephemeral session artifacts with no semantic change to behavior or instructions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.193 (external, sdk-cli) -> claude-cli/2.1.195 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.193 (external, sdk-cli)	claude-cli/2.1.195 (external, sdk-cli)

v2.1.193

Jul 15

trivial Jul 15, 2026

Version bump and temp path rotation

The billing header version string was incremented from 2.1.191.1b2 to 2.1.193.101 and the internal cache hash updated. The ephemeral memory directory path was rotated to a new temporary folder name, reflecting a new session or environment instance with no semantic change to behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.191 (external, sdk-cli) -> claude-cli/2.1.193 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.191 (external, sdk-cli)	claude-cli/2.1.193 (external, sdk-cli)

v2.1.191

Jul 15

trivial Jul 15, 2026

Version and session path bump

The billing header was updated to reflect the new version string (2.1.191.1b2) and a new build hash. The ephemeral memory directory path was rotated to a new temporary session identifier, which is expected behavior between runs.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.190 (external, sdk-cli) -> claude-cli/2.1.191 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.190 (external, sdk-cli)	claude-cli/2.1.191 (external, sdk-cli)

v2.1.190

Jul 15

trivial Jul 15, 2026

Version bump and session path update

The billing header was updated to reflect the new version (2.1.190) and a new session hash. The ephemeral memory directory path was updated to a new temporary session identifier, consistent with a new runtime environment being provisioned.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.187 (external, sdk-cli) -> claude-cli/2.1.190 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.187 (external, sdk-cli)	claude-cli/2.1.190 (external, sdk-cli)

v2.1.187

Jul 15

trivial Jul 15, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.187) and a new content-cache hash. The ephemeral memory directory path was rotated to a new randomly-generated temp folder, which is expected churn for session-scoped environments.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool removed / AskUserQuestiontool removed
Schema removed / AskUserQuestioninput schema removed
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.186 (external, sdk-cli) -> claude-cli/2.1.187 (external, sdk-cli)

Split-view diff5 fields changedtools · 2prompts · 2transport · 1

Field	Before	After
toolsAskUserQuestion	present	—
toolstool count	10	9
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.186 (external, sdk-cli)	claude-cli/2.1.187 (external, sdk-cli)

v2.1.186

Jul 15

trivial Jul 15, 2026

Session temp path identifier rotated

The version string and billing header hash were bumped to 2.1.186, and the ephemeral session directory path in the memory section changed from `-tmp-tmp-b0Zo3kSFhs` to `-tmp-tmp-6OpoCrp79J`. This reflects a new runtime session identifier with no semantic or behavioral change to the prompt.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.185 (external, sdk-cli) -> claude-cli/2.1.186 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.185 (external, sdk-cli)	claude-cli/2.1.186 (external, sdk-cli)

v2.1.185

Jul 15

trivial Jul 15, 2026

Version bump and temp path update

The billing header version string was incremented from 2.1.183 to 2.1.185 and its associated hash tokens were updated. The persistent memory directory path was updated to reflect a new temporary session directory, which is an ephemeral environment artifact rather than a behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.183 (external, sdk-cli) -> claude-cli/2.1.185 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff4 fields changedprompts · 2transport · 2

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.183 (external, sdk-cli)	claude-cli/2.1.185 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["thinking-token-count-2026-05-13"], "removed": []}

v2.1.183

Jul 15

trivial Jul 15, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.183) and a new build hash. The persistent memory directory path was rotated to a new temporary directory name, which is a routine environment identifier change with no behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.182 (external, sdk-cli) -> claude-cli/2.1.183 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.182 (external, sdk-cli)	claude-cli/2.1.183 (external, sdk-cli)

v2.1.182

Jul 15

trivial Jul 15, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.182) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder name, which is expected behavior for session-scoped scratch directories.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.181 (external, sdk-cli) -> claude-cli/2.1.182 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.181 (external, sdk-cli)	claude-cli/2.1.182 (external, sdk-cli)

v2.1.181

Jul 15

trivial Jul 15, 2026

Version and session path bump only

The billing header was updated to reflect the new version (2.1.181) and a new build hash. The memory directory path was updated to a new ephemeral session identifier, which is a routine environment change with no behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.179 (external, sdk-cli) -> claude-cli/2.1.181 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.179 (external, sdk-cli)	claude-cli/2.1.181 (external, sdk-cli)

v2.1.179

Jul 15

trivial Jul 15, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.179) and a new build hash. The ephemeral temp directory path for persistent file-based memory was rotated to a new randomly-generated value, which is expected churn between runs.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.178 (external, sdk-cli) -> claude-cli/2.1.179 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.178 (external, sdk-cli)	claude-cli/2.1.179 (external, sdk-cli)

v2.1.178

Jun 16

notable Jun 16, 2026

Adds Fable 5 to model catalog

The environment section was updated to introduce "Fable 5" as a new top-tier Claude model, adding its model ID `claude-fable-5` alongside the existing Claude 4.X family. The working directory and memory paths were scrubbed to anonymized placeholders, and the billing header was bumped to the new version.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Agentdescription -1,454 chars
Tool schema / Agentschema changed
Tool description / Skilldescription +398 chars
Tool description / Workflowdescription +261 chars
Prompt block / 0+0 chars
Prompt block / 3+9 chars
Header / user_agentclaude-cli/2.1.168 (external, sdk-cli) -> claude-cli/2.1.178 (external, sdk-cli)

Split-view diff8 fields changedtools · 3prompts · 3schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (-1,454 chars, -6 lines)
schemasAgent	previous schema	updated schema
toolsSkill / description	previous description	description changed (+398 chars, +1 lines)
toolsWorkflow / description	previous description	description changed (+261 chars)
promptstotal prompt size	5,548 chars	5,557 chars (+9)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+9 chars)
transportheader / user_agent	claude-cli/2.1.168 (external, sdk-cli)	claude-cli/2.1.178 (external, sdk-cli)

v2.1.168

Jun 8

trivial Jun 8, 2026

Session temp directory path rotation

The version bump from 2.1.167 to 2.1.168 updated the ephemeral session identifiers in the billing header, memory path, and working directory — all reflecting a new sandbox temp directory (`tmp.vRd5QwE2fQ` replacing `tmp.3Ej3CqcIAl`). No semantic or behavioral changes were made to the prompt logic.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.167 (external, sdk-cli) -> claude-cli/2.1.168 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.167 (external, sdk-cli)	claude-cli/2.1.168 (external, sdk-cli)

v2.1.167

Jun 8

trivial Jun 8, 2026

Session temp directory paths rotated

The version bump from 2.1.166 to 2.1.167 updated the ephemeral session identifiers in the billing header, memory path, and working directory — all reflecting a new sandbox temp directory (`tmp.3Ej3CqcIAl` replacing `tmp.rgx5jaA0EU`). No semantic or behavioral changes were made.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.166 (external, sdk-cli) -> claude-cli/2.1.167 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.166 (external, sdk-cli)	claude-cli/2.1.167 (external, sdk-cli)

v2.1.166

Jun 8

trivial Jun 8, 2026

Session temp directory paths rotated

The version bump from 2.1.165 to 2.1.166 updated the billing header version and hash, and rotated the ephemeral session-specific temporary directory from `tmp.Yak4JyYwST` to `tmp.rgx5jaA0EU`. All references to the working directory and memory path were updated accordingly. No behavioral or semantic changes were made.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool schema / Agentschema changed
Tool description / Workflowdescription +59 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.165 (external, sdk-cli) -> claude-cli/2.1.166 (external, sdk-cli)

Split-view diff5 fields changedprompts · 2schemas · 1tools · 1transport · 1

Field	Before	After
schemasAgent	previous schema	updated schema
toolsWorkflow / description	previous description	description changed (+59 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.165 (external, sdk-cli)	claude-cli/2.1.166 (external, sdk-cli)

v2.1.165

Jun 8

trivial Jun 8, 2026

Session temp directory path updated

The version header, memory path, and working directory were updated to reflect a new ephemeral session directory (`tmp.Yak4JyYwST` replacing `tmp.suH6iNcvv7`). This is a routine environment refresh with no semantic or behavioral changes.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.163 (external, sdk-cli) -> claude-cli/2.1.165 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.163 (external, sdk-cli)	claude-cli/2.1.165 (external, sdk-cli)

v2.1.163

Jun 8

trivial Jun 8, 2026

Session temp directory path rotated

The version bump from 2.1.162 to 2.1.163 updated the ephemeral session identifiers in the billing header, memory path, and working directory. All three changes reflect a new temporary directory token (`tmp.suH6iNcvv7` replacing `tmp.0rs4RFPRYz`) with no semantic or behavioral changes.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Workflowdescription +124 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.162 (external, sdk-cli) -> claude-cli/2.1.163 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsWorkflow / description	previous description	description changed (+124 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.162 (external, sdk-cli)	claude-cli/2.1.163 (external, sdk-cli)

v2.1.162

Jun 8

trivial Jun 8, 2026

Session temp directory path updated

The version bump from 2.1.161 to 2.1.162 updated the ephemeral session identifiers: the temp directory, memory path, and billing header hash all reflect a new sandbox instance (`tmp.0rs4RFPRYz` replacing `tmp.tbVfZ4rjH9`). No semantic or behavioral changes were made.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool removed / Globtool removed
Schema removed / Globinput schema removed
Tool removed / Greptool removed
Schema removed / Grepinput schema removed
Tool description / Bashdescription -16 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.161 (external, sdk-cli) -> claude-cli/2.1.162 (external, sdk-cli)

Split-view diff7 fields changedtools · 4prompts · 2transport · 1

Field	Before	After
toolsGlob	present	—
toolsGrep	present	—
toolsBash / description	previous description	description changed (-16 chars)
toolstool count	12	10
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.161 (external, sdk-cli)	claude-cli/2.1.162 (external, sdk-cli)

v2.1.161

Jun 3

trivial Jun 3, 2026

Session temp directory path updated

The version bump from 2.1.160 to 2.1.161 rotates the ephemeral session identifiers: the billing header hash, the memory path, and the primary working directory all reflect a new temporary directory (`tmp.tbVfZ4rjH9` replacing `tmp.UnPITHceHu`). No behavioral or instructional content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.160 (external, sdk-cli) -> claude-cli/2.1.161 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.160 (external, sdk-cli)	claude-cli/2.1.161 (external, sdk-cli)

v2.1.160

Jun 3

trivial Jun 3, 2026

Session temp directory path rotated

The version bump from 2.1.159 to 2.1.160 updated the ephemeral session identifiers in the billing header, memory path, and working directory. All changes reflect a new sandbox session token (`tmp.UnPITHceHu` replacing `tmp.Ft5Lv4R4yN`) with no semantic or behavioral differences.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Workflowdescription +51 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.159 (external, sdk-cli) -> claude-cli/2.1.160 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsWorkflow / description	previous description	description changed (+51 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.159 (external, sdk-cli)	claude-cli/2.1.160 (external, sdk-cli)

v2.1.159

Jun 3

trivial Jun 3, 2026

Session temp directory paths rotated

The version bump from 2.1.158 to 2.1.159 updated the ephemeral session identifiers in the billing header, memory path, and working directory. All changes reflect a new temporary session directory (`tmp.Ft5Lv4R4yN` replacing `tmp.EhPVrItC2O`) with no semantic or behavioral modifications.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.158 (external, sdk-cli) -> claude-cli/2.1.159 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.158 (external, sdk-cli)	claude-cli/2.1.159 (external, sdk-cli)

v2.1.158

Jun 3

trivial Jun 3, 2026

Session temp directory path rotated

The version bump from 2.1.157 to 2.1.158 updated the ephemeral session identifiers: the billing header hash, the memory path, and the working directory all reflect a new temporary directory (`tmp.EhPVrItC2O` replacing `tmp.tLu0M4dBBg`). No semantic or behavioral changes were made.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.157 (external, sdk-cli) -> claude-cli/2.1.158 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.157 (external, sdk-cli)	claude-cli/2.1.158 (external, sdk-cli)

v2.1.157

Jun 3

trivial Jun 3, 2026

Version and temp directory bump

The billing header was updated to reflect the new version (2.1.157) and a new build hash. The ephemeral working directory and memory path were rotated to a new temporary directory (`tmp.tLu0M4dBBg`), replacing the previous session's path (`tmp.PDsPyL9jQw`). No behavioral or instructional content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.156 (external, sdk-cli) -> claude-cli/2.1.157 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.156 (external, sdk-cli)	claude-cli/2.1.157 (external, sdk-cli)

v2.1.156

Jun 3

trivial Jun 3, 2026

Session temp directory paths rotated

The version bump from 2.1.154 to 2.1.156 updated the billing header hash and rotated the ephemeral session identifiers: the temp directory (`tmp.WQ2wxXFul7` → `tmp.PDsPyL9jQw`) changed in both the memory path and the primary working directory. No behavioral or instructional content was modified.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.154 (external, sdk-cli) -> claude-cli/2.1.156 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.154 (external, sdk-cli)	claude-cli/2.1.156 (external, sdk-cli)

v2.1.154

Jun 3

major Jun 3, 2026

Major prompt condensation and reorganization

The system prompt was substantially rewritten, cutting it from ~224 lines to ~61 lines by condensing verbose multi-section guidance (task execution, tone, tool use, memory) into tighter prose equivalents. The memory system instructions, coding guidelines, confirmation-before-action rules, and session workflow were all collapsed into shorter paragraphs without removing the underlying policies. The model reference was also bumped from Opus 4.7 to Opus 4.8.

ModelPromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Agentdescription -4,412 chars
Tool description / AskUserQuestiondescription +137 chars
Tool description / Bashdescription -9,117 chars
Tool description / Editdescription -734 chars
Tool description / Globdescription -231 chars
Tool description / Grepdescription -389 chars
Tool description / Readdescription -992 chars
Tool description / Workflowdescription +1,362 chars
Tool schema / Workflowschema changed
Tool description / Writedescription -378 chars
Prompt block / 0+0 chars
Prompt block / 2-8,785 chars
Prompt block / 3-11,961 chars
Model setting / modelclaude-opus-4-7 -> claude-opus-4-8
Header / user_agentclaude-cli/2.1.153 (external, sdk-cli) -> claude-cli/2.1.154 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff17 fields changedtools · 9prompts · 4transport · 2schemas · 1model · 1

Field	Before	After
toolsAgent / description	previous description	description changed (-4,412 chars, -49 lines)
toolsAskUserQuestion / description	previous description	description changed (+137 chars, -2 lines)
toolsBash / description	previous description	description changed (-9,117 chars, -108 lines)
toolsEdit / description	previous description	description changed (-734 chars, -4 lines)
toolsGlob / description	previous description	description changed (-231 chars, -4 lines)
toolsGrep / description	previous description	description changed (-389 chars, -5 lines)
toolsRead / description	previous description	description changed (-992 chars, -6 lines)
toolsWorkflow / description	previous description	description changed (+1,362 chars, +3 lines)
schemasWorkflow	previous schema	updated schema
toolsWrite / description	previous description	description changed (-378 chars, -5 lines)
promptstotal prompt size	26,294 chars	5,548 chars (-20,746)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-8,785 chars)
promptsblock 3	previous text	text changed (-11,961 chars)
modelmodel	claude-opus-4-7	claude-opus-4-8
transportheader / user_agent	claude-cli/2.1.153 (external, sdk-cli)	claude-cli/2.1.154 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["mid-conversation-system-2026-04-07"], "removed": []}

v2.1.153

Jun 3

trivial Jun 3, 2026

Session temp directory path rotation

The version bump from 2.1.152 to 2.1.153 updated the ephemeral session identifiers in the billing header, memory path, and working directory, reflecting a new sandbox environment instance. No semantic or behavioral changes were introduced.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / Workflownew tool description
Schema added / Workflownew input schema
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.152 (external, sdk-cli) -> claude-cli/2.1.153 (external, sdk-cli)

Split-view diff5 fields changedtools · 2prompts · 2transport · 1

Field	Before	After
toolsWorkflow	—	added
toolstool count	11	12
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.152 (external, sdk-cli)	claude-cli/2.1.153 (external, sdk-cli)

v2.1.152

Jun 3

trivial Jun 3, 2026

Environment paths and OS version bumped

The billing header version, temporary directory paths, and memory system path were updated to reflect a new runner environment. The Azure Linux kernel version incremented from 6.8.0-1044 to 6.8.0-1052, indicating an infrastructure update with no semantic or behavioral changes to the assistant's instructions.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / AskUserQuestiondescription -114 chars
Prompt block / 0+0 chars
Prompt block / 3+36 chars
Header / user_agentclaude-cli/2.1.150 (external, sdk-cli) -> claude-cli/2.1.152 (external, sdk-cli)

Split-view diff5 fields changedprompts · 3tools · 1transport · 1

Field	Before	After
toolsAskUserQuestion / description	previous description	description changed (-114 chars)
promptstotal prompt size	26,258 chars	26,294 chars (+36)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+36 chars)
transportheader / user_agent	claude-cli/2.1.150 (external, sdk-cli)	claude-cli/2.1.152 (external, sdk-cli)

v2.1.150

May 26

trivial May 26, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.150) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder, which is an expected environment-level churn with no behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.149 (external, sdk-cli) -> claude-cli/2.1.150 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.149 (external, sdk-cli)	claude-cli/2.1.150 (external, sdk-cli)

v2.1.149

May 26

trivial May 26, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.149) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder, which is a routine environmental change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.148 (external, sdk-cli) -> claude-cli/2.1.149 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.148 (external, sdk-cli)	claude-cli/2.1.149 (external, sdk-cli)

v2.1.148

May 26

trivial May 26, 2026

Version header and temp path bump

The billing header was updated to reflect the new version string (2.1.148.4bd) and a new content hash (31aa1). The ephemeral memory directory path was updated to a new temp folder name, consistent with a fresh runtime environment.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.147 (external, sdk-cli) -> claude-cli/2.1.148 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.147 (external, sdk-cli)	claude-cli/2.1.148 (external, sdk-cli)

v2.1.147

May 26

trivial May 26, 2026

Version bump and temp path scrub

The billing header was updated to reflect the new version (2.1.147) and a new build hash. The auto-memory directory path was rotated to a new temporary folder name, which is a routine environment scrub with no behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.146 (external, sdk-cli) -> claude-cli/2.1.147 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.146 (external, sdk-cli)	claude-cli/2.1.147 (external, sdk-cli)

v2.1.146

May 26

trivial May 26, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.146) and a new build hash. The auto-memory system's temporary directory path was rotated to a new randomly-named location, which is a routine environment-level change with no behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.145 (external, sdk-cli) -> claude-cli/2.1.146 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.145 (external, sdk-cli)	claude-cli/2.1.146 (external, sdk-cli)

v2.1.145

May 26

trivial May 26, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.145) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder, which is expected churn for sandbox or session-scoped environments.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.144 (external, sdk-cli) -> claude-cli/2.1.145 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.144 (external, sdk-cli)	claude-cli/2.1.145 (external, sdk-cli)

v2.1.144

May 19

trivial May 19, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.144) and a new content hash. The auto-memory system path was rotated to a new temporary directory, which is a routine environment-level change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.143 (external, sdk-cli) -> claude-cli/2.1.144 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.143 (external, sdk-cli)	claude-cli/2.1.144 (external, sdk-cli)

v2.1.143

May 17

trivial May 17, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.143) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder, which is a routine environment artifact with no behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.142 (external, sdk-cli) -> claude-cli/2.1.143 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.142 (external, sdk-cli)	claude-cli/2.1.143 (external, sdk-cli)

v2.1.142

May 15

minor May 15, 2026

TodoWrite renamed to TaskCreate

The tool used for planning and tracking work was renamed from `TodoWrite` to `TaskCreate` in the tool-use guidance. The memory directory path was also updated to a new ephemeral temp directory, and the billing header reflects the new version and build hash.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +2 chars
Prompt block / 0+0 chars
Prompt block / 2+1 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.141 (external, sdk-cli) -> claude-cli/2.1.142 (external, sdk-cli)

Split-view diff6 fields changedprompts · 4tools · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+2 chars)
promptstotal prompt size	26,257 chars	26,258 chars (+1)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+1 chars)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.141 (external, sdk-cli)	claude-cli/2.1.142 (external, sdk-cli)

v2.1.141

May 15

trivial May 15, 2026

Version bump and session path rotation

The billing header version string was updated from 2.1.140.576 to 2.1.141.90a with a new cache-control hash. The ephemeral memory directory path was rotated to a new temp folder, reflecting a new session environment.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription +133 chars
Tool schema / Grepproperties +-o
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.140 (external, sdk-cli) -> claude-cli/2.1.141 (external, sdk-cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+133 chars, +1 lines)
schemasGrep	previous schema	now has: -o
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.140 (external, sdk-cli)	claude-cli/2.1.141 (external, sdk-cli)

v2.1.140

May 13

notable May 13, 2026

Fast mode expanded to Opus 4.7

The description of Fast mode was updated to clarify it works with both Opus 4.6 and Opus 4.7, replacing the previous statement that it was exclusive to Opus 4.6. The model reference was also generalized from "Claude Opus 4.6" to "Claude Opus." The remaining changes are a version bump in the billing header and a routine scrubbed temp-path update for the memory system.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / ScheduleWakeupdescription +517 chars
Prompt block / 0+0 chars
Prompt block / 3+4 chars
Header / user_agentclaude-cli/2.1.139 (external, sdk-cli) -> claude-cli/2.1.140 (external, sdk-cli)

Split-view diff5 fields changedprompts · 3tools · 1transport · 1

Field	Before	After
toolsScheduleWakeup / description	previous description	description changed (+517 chars, +2 lines)
promptstotal prompt size	26,253 chars	26,257 chars (+4)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+4 chars)
transportheader / user_agent	claude-cli/2.1.139 (external, sdk-cli)	claude-cli/2.1.140 (external, sdk-cli)

v2.1.139

May 13

notable May 13, 2026

Memory schema and context guidance overhauled

The memory file frontmatter schema was updated: `name` now expects a kebab-case slug, `description` was relabeled "summary", and `type` moved under a new `metadata:` key. A wiki-style `[[name]]` linking system was introduced for cross-referencing memory files, with guidance that dangling links are acceptable. The context-management instruction was rewritten to explain that long conversations are summarized and carried forward automatically, replacing a vaguer note about writing down tool results.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+404 chars
Header / user_agentclaude-cli/2.1.138 (external, sdk-cli) -> claude-cli/2.1.139 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff5 fields changedprompts · 3transport · 2

Field	Before	After
promptstotal prompt size	25,849 chars	26,253 chars (+404)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+404 chars)
transportheader / user_agent	claude-cli/2.1.138 (external, sdk-cli)	claude-cli/2.1.139 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["cache-diagnosis-2026-04-07"], "removed": []}

v2.1.138

May 9

trivial May 9, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.138) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder, which is expected churn from session or environment recycling.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.137 (external, sdk-cli) -> claude-cli/2.1.138 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.137 (external, sdk-cli)	claude-cli/2.1.138 (external, sdk-cli)

v2.1.137

May 9

trivial May 9, 2026

Version bump and temp path refresh

The billing header version string was updated from 2.1.136 to 2.1.137 with a new hash, and the ephemeral temp directory path for the auto-memory system was rotated to a new random identifier. Neither change affects behavior or instructions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.136 (external, sdk-cli) -> claude-cli/2.1.137 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.136 (external, sdk-cli)	claude-cli/2.1.137 (external, sdk-cli)

v2.1.136

May 9

trivial May 9, 2026

Version bump and temp path update

The billing header version string was incremented from 2.1.133 to 2.1.136 and the associated build hash was updated. The auto-memory system's temporary directory path was rotated to a new scrubbed identifier, reflecting a new session or environment instance with no behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.133 (external, sdk-cli) -> claude-cli/2.1.136 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.133 (external, sdk-cli)	claude-cli/2.1.136 (external, sdk-cli)

v2.1.133

May 9

trivial May 9, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.133) and a new content-cache hash. The ephemeral memory directory path was rotated to a new temporary folder, which is a routine environmental change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.132 (external, sdk-cli) -> claude-cli/2.1.133 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.132 (external, sdk-cli)	claude-cli/2.1.133 (external, sdk-cli)

v2.1.132

May 7

trivial May 7, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.132) and a new content hash. The auto-memory system's temporary project directory path was rotated to a new random identifier, which is expected churn in ephemeral environments.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / AskUserQuestionnew tool description
Schema added / AskUserQuestionnew input schema
Tool schema / Bashschema changed
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.131 (external, sdk-cli) -> claude-cli/2.1.132 (external, sdk-cli)

Split-view diff6 fields changedtools · 2prompts · 2schemas · 1transport · 1

Field	Before	After
toolsAskUserQuestion	—	added
schemasBash	previous schema	updated schema
toolstool count	10	11
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.131 (external, sdk-cli)	claude-cli/2.1.132 (external, sdk-cli)

v2.1.131

May 6

trivial May 6, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.131) and a new build hash. The auto-memory system path was rotated to a new temporary directory, which is a routine scrubbed-path change with no behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.129 (external, sdk-cli) -> claude-cli/2.1.131 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.129 (external, sdk-cli)	claude-cli/2.1.131 (external, sdk-cli)

v2.1.129

May 6

notable May 6, 2026

Upgraded to Opus 4.7 with 1M context

The active model was switched from Claude Sonnet 4.6 to Claude Opus 4.7 with a 1-million-token context window. The assistant knowledge cutoff was updated from August 2025 to January 2026. The memory system path and billing header hashes also reflect a new session.

ModelPromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +22 chars
Prompt block / 0+0 chars
Prompt block / 3+14 chars
Model setting / modelclaude-sonnet-4-6 -> claude-opus-4-7
Model setting / max_tokens32,000 -> 64,000
Header / user_agentclaude-cli/2.1.128 (external, sdk-cli) -> claude-cli/2.1.129 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff8 fields changedprompts · 3model · 2transport · 2tools · 1

Field	Before	After
toolsBash / description	previous description	description changed (+22 chars)
promptstotal prompt size	25,835 chars	25,849 chars (+14)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+14 chars)
modelmodel	claude-sonnet-4-6	claude-opus-4-7
modelmax_tokens	32,000	64,000
transportheader / user_agent	claude-cli/2.1.128 (external, sdk-cli)	claude-cli/2.1.129 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["context-1m-2025-08-07"], "removed": []}

v2.1.128

May 6

trivial May 6, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.128) and a new build hash. The ephemeral memory directory path was rotated to a new temporary folder, which is a routine environmental refresh with no behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Readdescription +147 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.126 (external, sdk-cli) -> claude-cli/2.1.128 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsRead / description	previous description	description changed (+147 chars, +1 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.126 (external, sdk-cli)	claude-cli/2.1.128 (external, sdk-cli)

v2.1.126

May 6

trivial May 6, 2026

Version bump and temp path rotation

The billing header was updated to reflect the new version (2.1.126) and a new build hash. The persistent memory directory path was rotated to a new temporary folder name, which is an expected environmental artifact of how the scratchpad path is generated per session.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.124 (external, sdk-cli) -> claude-cli/2.1.126 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.124 (external, sdk-cli)	claude-cli/2.1.126 (external, sdk-cli)

v2.1.124

May 6

notable May 6, 2026

Removes word-limit length constraints

The strict word-count limits ("≤25 words between tool calls" and "≤100 words for final responses") were removed, and the surrounding instruction was relocated under a new "# Context management" section header. The memory path and a minor indentation fix also changed, but these are ephemeral environment values with no behavioral impact.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Agentdescription +121 chars
Tool schema / Agentproperties +mode, +name, +team_name
Tool description / Readdescription +3 chars
Prompt block / 0+0 chars
Prompt block / 3-112 chars
Header / user_agentclaude-cli/2.1.114 (external, sdk-cli) -> claude-cli/2.1.124 (external, sdk-cli)

Split-view diff7 fields changedprompts · 3tools · 2schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+121 chars)
schemasAgent	previous schema	now has: mode, name, team_name
toolsRead / description	previous description	description changed (+3 chars)
promptstotal prompt size	25,947 chars	25,835 chars (-112)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (-112 chars)
transportheader / user_agent	claude-cli/2.1.114 (external, sdk-cli)	claude-cli/2.1.124 (external, sdk-cli)

v2.1.123

Apr 29

trivial Apr 29, 2026

Ephemeral session identifiers rotated

Two session-scoped identifiers were updated: the billing header's `cch` hash changed from `4fb5a` to `86522`, and the auto-memory temp directory path changed from `-tmp-tmp-yD8vUbA4ym` to `-tmp-tmp-4OtRDt9HSj`. These are purely runtime-generated values with no semantic impact on behavior.

PromptsLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars

Split-view diff2 fields changedprompts · 2

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)

v2.1.122

Apr 29

trivial Apr 29, 2026

Session path and billing hash rotated

The billing header's `cch` hash and the auto-memory temporary directory path were both updated to new randomized values, reflecting a new session or environment instance. No behavioral or instructional content changed.

PromptsLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars

Split-view diff2 fields changedprompts · 2

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)

v2.1.121

Apr 29

trivial Apr 29, 2026

Session-scoped path and header hash update

Two ephemeral, session-specific values were rotated: the billing header's `cch` hash changed from `c8772` to `aaa7b`, and the auto-memory directory path was updated to a new temp folder. These are instance-level identifiers with no semantic or behavioral change to the prompt.

PromptsLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars

Split-view diff2 fields changedprompts · 2

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)

v2.1.120

Apr 25

trivial Apr 25, 2026

Session-scoped temp path rotated

The billing header hash and the auto-memory filesystem path were updated to reflect a new ephemeral session directory (`-tmp-tmp-eE9XIW2AJ9`), replacing the previous one (`-tmp-tmp-TyzauJIbkO`). These are environment-level identifier changes with no semantic or behavioral impact on the prompt's instructions.

PromptsLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars

Split-view diff2 fields changedprompts · 2

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)

v2.1.119

Apr 25

trivial Apr 25, 2026

Session temp paths rotated

The billing header hash, memory system path, and working directory path all changed to reflect a new ephemeral session environment. These are runtime-specific values (temp directory names and a cache hash) with no semantic or behavioral change to the prompt itself.

PromptsLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars

Split-view diff2 fields changedprompts · 2

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)

v2.1.118

Apr 23

notable Apr 23, 2026

Adds response length limits, drops ultrareview docs

A new length-limit rule was appended requiring inter-tool prose to stay under 25 words and final responses under 100 words. The ultrareview feature explanation was removed from the tool-use guidance section. Temp directory paths and the billing header version were also refreshed to reflect the new sandbox environment.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3-298 chars
Header / user_agentclaude-cli/2.1.117 (external, sdk-cli) -> claude-cli/2.1.114 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	26,245 chars	25,947 chars (-298)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text · cache=ephemeral	text changed (-298 chars) · cache=none
transportheader / user_agent	claude-cli/2.1.117 (external, sdk-cli)	claude-cli/2.1.114 (external, sdk-cli)

v2.1.117

Apr 22

notable Apr 22, 2026

Adds ultrareview slash-command guidance

A new instruction was added explaining the `/ultrareview` skill to users: what it does, how to invoke it (with or without a PR number), its billing implications, and the constraint that the assistant cannot launch it autonomously via Bash. The temporary working directory and memory path were also updated to a new session directory, which is a routine environmental change.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+430 chars
Header / user_agentclaude-cli/2.1.116 (external, sdk-cli) -> claude-cli/2.1.117 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	25,815 chars	26,245 chars (+430)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+430 chars)
transportheader / user_agent	claude-cli/2.1.116 (external, sdk-cli)	claude-cli/2.1.117 (external, sdk-cli)

v2.1.116

Apr 22

notable Apr 22, 2026

Removes strict response length limits

The hard word-count caps — 25 words between tool calls and 100 words for final responses — were removed entirely. The version and session-specific temp-directory paths were also refreshed to a new sandbox instance, which is a routine environment rotation with no semantic effect.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3-132 chars
Header / user_agentclaude-cli/2.1.114 (external, sdk-cli) -> claude-cli/2.1.116 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	25,947 chars	25,815 chars (-132)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (-132 chars)
transportheader / user_agent	claude-cli/2.1.114 (external, sdk-cli)	claude-cli/2.1.116 (external, sdk-cli)

v2.1.114

Apr 22

trivial Apr 22, 2026

Session temp directory paths rotated

The billing header version and hash were bumped to 2.1.114, and all references to the ephemeral session temp directory (`/tmp/tmp.QGZyQuVryM`) were updated to a new path (`/tmp/tmp.V6JylKwn8D`). This affects the working directory, the auto-memory path, and the billing header checksum — all of which are session-scoped runtime values with no semantic change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.113 (external, sdk-cli) -> claude-cli/2.1.114 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.113 (external, sdk-cli)	claude-cli/2.1.114 (external, sdk-cli)

v2.1.113

Apr 22

trivial Apr 22, 2026

Version bump and temp path rotation

The version string updated from 2.1.112 to 2.1.113 and the ephemeral temporary directory paths (`/tmp/tmp.HBECXEwYOz` → `/tmp/tmp.QGZyQuVryM`) were refreshed throughout the prompt, including the memory system path and the working directory. No behavioral or instructional content changed.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +174 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.112 (external, sdk-cli) -> claude-cli/2.1.113 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+174 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.112 (external, sdk-cli)	claude-cli/2.1.113 (external, sdk-cli)

v2.1.112

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory paths rotated

The version bump from 2.1.111 to 2.1.112 updated the randomly-generated temporary directory paths (billing header, memory system path, and working directory) from `/tmp/tmp.8AB5Cn82k7` to `/tmp/tmp.HBECXEwYOz`. This is a routine environment reset with no semantic or behavioral changes.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.111 (external, sdk-cli) -> claude-cli/2.1.112 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.111 (external, sdk-cli)	claude-cli/2.1.112 (external, sdk-cli)

v2.1.111

Apr 22

major Apr 22, 2026

Major workflow and output guidance overhaul

Several coding-behavior bullet points were consolidated, removed, or rewritten: guidance on reading files before modifying, time estimates, error diagnosis, and abstraction helpers was replaced or tightened. A new "Text output" section was added prescribing concise live updates, one-sentence pre-tool announcements, and strict end-of-turn summaries. Hard word-count limits (≤25 words between tool calls, ≤100 words for final responses) were introduced at the end.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / ScheduleWakeupnew tool description
Schema added / ScheduleWakeupnew input schema
Tool description / Agentdescription +0 chars
Tool description / Bashdescription +246 chars
Tool description / Readdescription -48 chars
Tool description / Skilldescription +43 chars
Tool schema / Skillschema changed
Prompt block / 0+0 chars
Prompt block / 2-1,418 chars
Prompt block / 3+969 chars
Header / user_agentclaude-cli/2.1.110 (external, sdk-cli) -> claude-cli/2.1.111 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff13 fields changedtools · 6prompts · 4transport · 2schemas · 1

Field	Before	After
toolsScheduleWakeup	—	added
toolsAgent / description	previous description	description changed (+0 chars)
toolsBash / description	previous description	description changed (+246 chars)
toolsRead / description	previous description	description changed (-48 chars)
toolsSkill / description	previous description	description changed (+43 chars, -3 lines)
schemasSkill	previous schema	updated schema
toolstool count	9	10
promptstotal prompt size	26,396 chars	25,947 chars (-449)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-1,418 chars)
promptsblock 3	previous text	text changed (+969 chars)
transportheader / user_agent	claude-cli/2.1.110 (external, sdk-cli)	claude-cli/2.1.111 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["advisor-tool-2026-03-01"], "removed": []}

v2.1.110

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory path refresh

The version bump from 2.1.109 to 2.1.110 updates only the temporary working directory and memory path from `/tmp/tmp.mfLNDJZbyS` to `/tmp/tmp.W66j1VAJur`, along with the corresponding billing header version string. These are session-scoped ephemeral paths that change between runner invocations and carry no semantic meaning.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / ToolSearchdescription -9 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.109 (external, sdk-cli) -> claude-cli/2.1.110 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsToolSearch / description	previous description	description changed (-9 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.109 (external, sdk-cli)	claude-cli/2.1.110 (external, sdk-cli)

v2.1.109

Apr 22

trivial Apr 22, 2026

Temp directory path refresh

The version bump from 2.1.108 to 2.1.109 updated the ephemeral temporary directory paths (`/tmp/tmp.ZEy0rG7Mwx` → `/tmp/tmp.mfLNDJZbyS`) in the billing header, memory system path, and working directory references. These are session-specific runtime values with no semantic change to behavior or instructions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.108 (external, sdk-cli) -> claude-cli/2.1.109 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.108 (external, sdk-cli)	claude-cli/2.1.109 (external, sdk-cli)

v2.1.108

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory paths rotated

The version bump from 2.1.107 to 2.1.108 updated the randomly-generated temporary directory paths used for the working directory and memory system, along with the corresponding billing header version string. These are session-specific environment values with no semantic change to behavior or instructions.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -14 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.107 (external, sdk-cli) -> claude-cli/2.1.108 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-14 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.107 (external, sdk-cli)	claude-cli/2.1.108 (external, sdk-cli)

v2.1.107

Apr 22

trivial Apr 22, 2026

Version bump and temp path rotation

The version identifier was incremented from 2.1.105 to 2.1.107 and the ephemeral temp directory paths (used for the working directory and memory system) were updated to a new randomly-generated location. No behavioral or instructional content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.105 (external, sdk-cli) -> claude-cli/2.1.107 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.105 (external, sdk-cli)	claude-cli/2.1.107 (external, sdk-cli)

v2.1.105

Apr 22

trivial Apr 22, 2026

Session temp directory paths updated

The version bump from 2.1.104 to 2.1.105 refreshed ephemeral session-specific paths: the billing header version token, the auto-memory directory, and the primary working directory all reflect a new temporary directory (`tmp.qYGQcDDL7P` replacing `tmp.2g6eHL1oWj`). No semantic or behavioral content changed.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription +194 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.104 (external, sdk-cli) -> claude-cli/2.1.105 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+194 chars, +1 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.104 (external, sdk-cli)	claude-cli/2.1.105 (external, sdk-cli)

v2.1.104

Apr 22

trivial Apr 22, 2026

Session temp directory paths rotated

The version string was bumped from 2.1.101 to 2.1.104 and the ephemeral session temp directory changed from `/tmp/tmp.TusKPtDJze` to `/tmp/tmp.2g6eHL1oWj`. All three references to the old path (billing header, memory system path, and working directory) were updated consistently to reflect the new session environment.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.101 (external, sdk-cli) -> claude-cli/2.1.104 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.101 (external, sdk-cli)	claude-cli/2.1.104 (external, sdk-cli)

v2.1.101

Apr 22

notable Apr 22, 2026

UI testing requirement added to workflow

A new instruction mandates that the agent start a dev server and manually test frontend changes in a browser before marking a task complete, including golden-path and edge-case verification. The update also clarifies that type checking and test suites alone are insufficient for confirming UI feature correctness. The remaining diff is a routine environment path bump tied to a new session temp directory.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+391 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.100 (external, sdk-cli) -> claude-cli/2.1.101 (external, sdk-cli)

Split-view diff5 fields changedprompts · 4transport · 1

Field	Before	After
promptstotal prompt size	26,005 chars	26,396 chars (+391)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+391 chars)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.100 (external, sdk-cli)	claude-cli/2.1.101 (external, sdk-cli)

v2.1.100

Apr 22

notable Apr 22, 2026

Session paths updated, output efficiency removed

The ephemeral session temp directory was rotated from `tmp.uk8R69HlMh` to `tmp.auqcUtLKrK`, updating both the memory path and the primary working directory. More substantively, the entire "Output efficiency" section — which instructed the assistant to be concise, lead with answers, and limit prose to decisions, status updates, and blockers — was deleted.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+1 chars
Prompt block / 2-732 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.98 (external, sdk-cli) -> claude-cli/2.1.100 (external, sdk-cli)

Split-view diff5 fields changedprompts · 4transport · 1

Field	Before	After
promptstotal prompt size	26,736 chars	26,005 chars (-731)
promptsblock 0	previous text	text changed (+1 chars)
promptsblock 2	previous text	text changed (-732 chars)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.98 (external, sdk-cli)	claude-cli/2.1.100 (external, sdk-cli)

v2.1.98

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory paths updated

The version bump from 2.1.97 to 2.1.98 updates two references to a session-specific temporary directory path (`/tmp/tmp.rcyzc7toWl` → `/tmp/tmp.uk8R69HlMh`), along with the corresponding billing header version string. These are runtime-generated ephemeral paths with no semantic change to behavior or instructions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.97 (external, sdk-cli) -> claude-cli/2.1.98 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.97 (external, sdk-cli)	claude-cli/2.1.98 (external, sdk-cli)

v2.1.97

Apr 22

trivial Apr 22, 2026

Temp path and model family wording refresh

The ephemeral working directory and memory path were updated to a new temp folder (`rcyzc7toWl` replacing `mVWZUShyRY`), reflecting a fresh runner environment. The model family description was lightly reworded from "Claude 4.5/4.6" to "Claude 4.6 and 4.5" to list the newer generation first. The billing header version string was also bumped to 2.1.97.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+4 chars
Header / user_agentclaude-cli/2.1.96 (external, sdk-cli) -> claude-cli/2.1.97 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	26,732 chars	26,736 chars (+4)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (+4 chars)
transportheader / user_agent	claude-cli/2.1.96 (external, sdk-cli)	claude-cli/2.1.97 (external, sdk-cli)

v2.1.96

Apr 22

trivial Apr 22, 2026

Session temp paths rotated

The version string and all ephemeral `/tmp` paths were updated to reflect a new session environment (`tmp.mVWZUShyRY` replacing `tmp.UQizFmG7Xo`). This affects the billing header build identifier, the auto-memory directory path, and the primary working directory. No behavioral or policy changes were made.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.94 (external, sdk-cli) -> claude-cli/2.1.96 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.94 (external, sdk-cli)	claude-cli/2.1.96 (external, sdk-cli)

v2.1.94

Apr 22

trivial Apr 22, 2026

Temp directory and version bump

The billing header version was bumped from 2.1.92 to 2.1.94, and all references to the ephemeral temp directory path were updated from `/tmp/tmp.d37KkKmXhE` to `/tmp/tmp.UQizFmG7Xo`. A minor wording change also dropped the phrase "proceed as if MEMORY.md were empty" from the ignore-memory instruction, slightly tightening that rule without changing its intent.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription +113 chars
Prompt block / 0+0 chars
Prompt block / 3-36 chars
Header / user_agentclaude-cli/2.1.92 (external, sdk-cli) -> claude-cli/2.1.94 (external, sdk-cli)

Split-view diff5 fields changedprompts · 3tools · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+113 chars, -12 lines)
promptstotal prompt size	26,768 chars	26,732 chars (-36)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (-36 chars)
transportheader / user_agent	claude-cli/2.1.92 (external, sdk-cli)	claude-cli/2.1.94 (external, sdk-cli)

v2.1.92

Apr 22

trivial Apr 22, 2026

Temp directory and version bump only

The version string was updated from 2.1.91 to 2.1.92, and two ephemeral temporary path references (`/tmp/tmp.IABSkeZJ3A` → `/tmp/tmp.d37KkKmXhE`) were updated to reflect a new runtime session directory. No behavioral or policy changes were made.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.91 (external, sdk-cli) -> claude-cli/2.1.92 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.91 (external, sdk-cli)	claude-cli/2.1.92 (external, sdk-cli)

v2.1.91

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory path rotation

The version string was bumped from 2.1.90 to 2.1.91 and the temporary working directory and memory path were updated from `/tmp/tmp.rw7umxLCVs` to `/tmp/tmp.IABSkeZJ3A`. These are environment-specific ephemeral paths that change between runs and carry no semantic meaning.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Editdescription -1 chars
Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.90 (external, sdk-cli) -> claude-cli/2.1.91 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsEdit / description	previous description	description changed (-1 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.90 (external, sdk-cli)	claude-cli/2.1.91 (external, sdk-cli)

v2.1.90

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory paths updated

The version token and two references to the ephemeral temporary working directory were updated from `/tmp/tmp.DozMCSmbhI` to `/tmp/tmp.rw7umxLCVs`, reflecting a new sandbox session. No behavioral or instructional content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 3+0 chars
Header / user_agentclaude-cli/2.1.89 (external, sdk-cli) -> claude-cli/2.1.90 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 3	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.89 (external, sdk-cli)	claude-cli/2.1.90 (external, sdk-cli)

v2.1.89

Apr 22

notable Apr 22, 2026

Session-specific guidance section introduced

Several instructions previously scattered inline (denied tool-call follow-up, Agent/subagent usage, Explore subagent guidance, and slash-skill invocation) were lifted out of their original locations and consolidated into a new "Session-specific guidance" section. The version bump and ephemeral temp-directory paths also updated, reflecting a new runner session.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Agentdescription +914 chars
Tool schema / Readschema changed
Prompt block / 0+0 chars
Prompt block / 1+0 chars
Prompt block / 2-14,897 chars
Prompt block / 3added
Header / user_agentclaude-cli/2.1.87 (external, sdk-cli) -> claude-cli/2.1.89 (external, sdk-cli)

Split-view diff8 fields changedprompts · 5tools · 1schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+914 chars, +13 lines)
schemasRead	previous schema	updated schema
promptstotal prompt size	26,738 chars	26,768 chars (+30)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 1	previous text · cache=ephemeral	metadata changed · cache=none
promptsblock 2	previous text	text changed (-14,897 chars)
promptsblock 3	—	new prompt block
transportheader / user_agent	claude-cli/2.1.87 (external, sdk-cli)	claude-cli/2.1.89 (external, sdk-cli)

v2.1.87

Apr 22

trivial Apr 22, 2026

Session temp directory path refreshed

The version bump from 2.1.86 to 2.1.87 updates only the ephemeral temp directory paths (`/tmp/tmp.yzU3wu6prJ` → `/tmp/tmp.J5sKoIA14o`) used for the memory system and working directory, along with the corresponding billing header version string. These are session-specific runtime values with no semantic change to behavior or instructions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.86 (external, sdk-cli) -> claude-cli/2.1.87 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.86 (external, sdk-cli)	claude-cli/2.1.87 (external, sdk-cli)

v2.1.86

Apr 22

notable Apr 22, 2026

Smarter failure-handling and complexity guidance

The failure-handling guideline was rewritten to encourage diagnosing errors before switching tactics and to reserve user escalation for genuine blockers rather than first friction. The complexity guideline was tightened to prohibit both speculative abstractions and half-finished implementations. The remaining diff is a session-scoped temp-directory bump with no semantic effect.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription -294 chars
Tool description / Editdescription -13 chars
Prompt block / 0+0 chars
Prompt block / 2+79 chars
Header / user_agentclaude-cli/2.1.85 (external, sdk-cli) -> claude-cli/2.1.86 (external, sdk-cli)

Split-view diff6 fields changedprompts · 3tools · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-294 chars, -1 lines)
toolsEdit / description	previous description	description changed (-13 chars)
promptstotal prompt size	26,659 chars	26,738 chars (+79)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+79 chars)
transportheader / user_agent	claude-cli/2.1.85 (external, sdk-cli)	claude-cli/2.1.86 (external, sdk-cli)

v2.1.85

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory paths updated

The version bump from 2.1.84 to 2.1.85 updates the session-specific temporary directory paths (both the memory system path and the primary working directory) from `/tmp/tmp.Jwuu2Hd5mp` to `/tmp/tmp.tEbUM629nU`. This is a routine runtime environment refresh with no semantic or behavioral changes.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.84 (external, sdk-cli) -> claude-cli/2.1.85 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.84 (external, sdk-cli)	claude-cli/2.1.85 (external, sdk-cli)

v2.1.84

Apr 22

notable Apr 22, 2026

Over-engineering rules promoted to top-level

The three sub-bullet points under "Avoid over-engineering" were un-indented and promoted to standalone top-level guidelines, removing the parent "Avoid over-engineering" bullet entirely. A new formatting rule was also added instructing the assistant to reference GitHub issues and pull requests using the `owner/repo#123` format for clickable links. The memory path and working directory reflect a new sandbox environment.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / Agentnew tool description
Schema added / Agentnew input schema
Tool added / Bashnew tool description
Schema added / Bashnew input schema
Tool added / Editnew tool description
Schema added / Editnew input schema
Tool added / Globnew tool description
Schema added / Globnew input schema
Tool added / Grepnew tool description
Schema added / Grepnew input schema
Tool added / Readnew tool description
Schema added / Readnew input schema
Tool added / Skillnew tool description
Schema added / Skillnew input schema
Tool added / Writenew tool description
Schema added / Writenew input schema
Prompt block / 0+0 chars
Prompt block / 2+18 chars
Header / user_agentclaude-cli/2.1.83 (external, sdk-cli) -> claude-cli/2.1.84 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff14 fields changedtools · 9prompts · 3transport · 2

Field	Before	After
toolsAgent	—	added
toolsBash	—	added
toolsEdit	—	added
toolsGlob	—	added
toolsGrep	—	added
toolsRead	—	added
toolsSkill	—	added
toolsWrite	—	added
toolstool count	1	9
promptstotal prompt size	26,641 chars	26,659 chars (+18)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+18 chars)
transportheader / user_agent	claude-cli/2.1.83 (external, sdk-cli)	claude-cli/2.1.84 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["context-management-2025-06-27"], "removed": []}

v2.1.83

Apr 22

major Apr 22, 2026

Major memory system overhaul with typed entries

The auto-memory section was substantially rewritten to introduce a structured, typed memory system with four distinct categories: user, feedback, project, and reference. A two-step save process (individual file + MEMORY.md index pointer) replaces the previous freeform approach, and detailed guidance was added on when to access, verify, and distinguish memory from other persistence mechanisms like plans and tasks. Minor environment section cleanup also removed the `<fast_mode_info>` XML block in favor of inline text.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool removed / Agenttool removed
Schema removed / Agentinput schema removed
Tool removed / Bashtool removed
Schema removed / Bashinput schema removed
Tool removed / Edittool removed
Schema removed / Editinput schema removed
Tool removed / Globtool removed
Schema removed / Globinput schema removed
Tool removed / Greptool removed
Schema removed / Grepinput schema removed
Tool removed / Readtool removed
Schema removed / Readinput schema removed
Tool removed / Skilltool removed
Schema removed / Skillinput schema removed
Tool removed / Writetool removed
Schema removed / Writeinput schema removed
Tool description / ToolSearchdescription +9 chars
Prompt block / 0+0 chars
Prompt block / 2+10,548 chars
Header / user_agentclaude-cli/2.1.81 (external, sdk-cli) -> claude-cli/2.1.83 (external, sdk-cli)

Split-view diff14 fields changedtools · 10prompts · 3transport · 1

Field	Before	After
toolsAgent	present	—
toolsBash	present	—
toolsEdit	present	—
toolsGlob	present	—
toolsGrep	present	—
toolsRead	present	—
toolsSkill	present	—
toolsWrite	present	—
toolsToolSearch / description	previous description	description changed (+9 chars)
toolstool count	9	1
promptstotal prompt size	16,093 chars	26,641 chars (+10,548)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+10,548 chars)
transportheader / user_agent	claude-cli/2.1.81 (external, sdk-cli)	claude-cli/2.1.83 (external, sdk-cli)

v2.1.81

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory path bump

The version string was incremented from 2.1.80 to 2.1.81 and the ephemeral temporary directory paths (used for auto memory and the primary working directory) were updated to a new random token. These are runtime environment artifacts with no semantic change to behavior or instructions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.80 (external, sdk-cli) -> claude-cli/2.1.81 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.80 (external, sdk-cli)	claude-cli/2.1.81 (external, sdk-cli)

v2.1.80

Apr 22

trivial Apr 22, 2026

Session temp directory paths rotated

The version string was bumped from 2.1.79 to 2.1.80, and all ephemeral session-specific paths (the auto memory directory and primary working directory) were updated to reflect a new temporary directory name (`tmp.wBHQaAkuM8` replacing `tmp.ME0Ohtjzab`). No behavioral or instructional content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.79 (external, sdk-cli) -> claude-cli/2.1.80 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.79 (external, sdk-cli)	claude-cli/2.1.80 (external, sdk-cli)

v2.1.79

Apr 22

trivial Apr 22, 2026

Version bump and temp path rotation

The billing header version string was incremented from 2.1.78.13b to 2.1.79.04b. The ephemeral working directory and auto-memory path were updated from `/tmp/tmp.SqIlVGvMS3` to `/tmp/tmp.ME0Ohtjzab`, reflecting a new sandbox or runner environment instance. No behavioral or policy changes were made.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.78 (external, sdk-cli) -> claude-cli/2.1.79 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.78 (external, sdk-cli)	claude-cli/2.1.79 (external, sdk-cli)

v2.1.78

Apr 22

notable Apr 22, 2026

Adds output conciseness rules and data-upload warning

A new "Output efficiency" section was added instructing the assistant to lead with answers, skip preamble, and keep text brief unless writing code or making tool calls. A new safety bullet warns that uploading content to third-party web tools (diagram renderers, pastebins, gists) may be cached or indexed even after deletion. The memory and working-directory paths were also updated to a new temp session directory.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+942 chars
Header / user_agentclaude-cli/2.1.77 (external, sdk-cli) -> claude-cli/2.1.78 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	15,151 chars	16,093 chars (+942)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+942 chars)
transportheader / user_agent	claude-cli/2.1.77 (external, sdk-cli)	claude-cli/2.1.78 (external, sdk-cli)

v2.1.77

Apr 22

trivial Apr 22, 2026

Version bump and temp directory refresh

The billing header version string was updated from 2.1.75 to 2.1.77, and all ephemeral temp directory paths were updated from `/tmp/tmp.g3RVjW13Cv` to `/tmp/tmp.yHaebYz6w2`, affecting both the auto memory path and the primary working directory references. These are purely environment-level instance changes with no semantic or behavioral differences.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / Agentnew tool description
Schema added / Agentnew input schema
Tool added / Bashnew tool description
Schema added / Bashnew input schema
Tool added / Editnew tool description
Schema added / Editnew input schema
Tool added / Globnew tool description
Schema added / Globnew input schema
Tool added / Grepnew tool description
Schema added / Grepnew input schema
Tool added / Readnew tool description
Schema added / Readnew input schema
Tool added / Skillnew tool description
Schema added / Skillnew input schema
Tool added / Writenew tool description
Schema added / Writenew input schema
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.75 (external, sdk-cli) -> claude-cli/2.1.77 (external, sdk-cli)

Split-view diff12 fields changedtools · 9prompts · 2transport · 1

Field	Before	After
toolsAgent	—	added
toolsBash	—	added
toolsEdit	—	added
toolsGlob	—	added
toolsGrep	—	added
toolsRead	—	added
toolsSkill	—	added
toolsWrite	—	added
toolstool count	1	9
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.75 (external, sdk-cli)	claude-cli/2.1.77 (external, sdk-cli)

v2.1.75

Apr 22

trivial Apr 22, 2026

Ephemeral temp directory path bump

The version string, auto-memory directory path, and primary working directory were all updated to reflect a new ephemeral temp directory (`tmp.g3RVjW13Cv` replacing `tmp.PcCz9Ch5Rj`). This is a routine environment refresh with no semantic or behavioral changes.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.74 (external, sdk-cli) -> claude-cli/2.1.75 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.74 (external, sdk-cli)	claude-cli/2.1.75 (external, sdk-cli)

v2.1.74

Apr 22

notable Apr 22, 2026

Memory directory write instruction added

The auto memory section now explicitly instructs the agent to write directly to the memory directory using the Write tool, without running `mkdir` or checking for its existence first. The working directory and memory path were also updated to a new ephemeral temp path, reflecting a new runtime environment. The version header was bumped accordingly.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+120 chars
Header / user_agentclaude-cli/2.1.73 (external, sdk-cli) -> claude-cli/2.1.74 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	15,031 chars	15,151 chars (+120)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+120 chars)
transportheader / user_agent	claude-cli/2.1.73 (external, sdk-cli)	claude-cli/2.1.74 (external, sdk-cli)

v2.1.73

Apr 22

trivial Apr 22, 2026

Version bump and temp path refresh

The version string was incremented from 2.1.72 to 2.1.73, and ephemeral temporary directory paths (used for the auto memory directory and primary working directory) were updated to a new randomly-generated temp folder. These are environment-specific runtime values with no semantic behavior change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.72 (external, sdk-cli) -> claude-cli/2.1.73 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.72 (external, sdk-cli)	claude-cli/2.1.73 (external, sdk-cli)

v2.1.72

Apr 22

notable Apr 22, 2026

Adds tool-result note-taking instruction

A new instruction was appended directing the assistant to write down important information from tool results within its response, since original tool results may be cleared later. The memory and working-directory paths were rotated to a new temp directory (routine instance churn). A minor grammatical fix was also made to the Explore subagent guidance sentence.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / ToolSearchdescription -2,241 chars
Prompt block / 0+0 chars
Prompt block / 2+162 chars
Header / user_agentclaude-cli/2.1.71 (external, sdk-cli) -> claude-cli/2.1.72 (external, sdk-cli)
Header / anthropic_beta+1 / -1

Split-view diff6 fields changedprompts · 3transport · 2tools · 1

Field	Before	After
toolsToolSearch / description	previous description	description changed (-2,241 chars, -61 lines)
promptstotal prompt size	14,869 chars	15,031 chars (+162)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+162 chars)
transportheader / user_agent	claude-cli/2.1.71 (external, sdk-cli)	claude-cli/2.1.72 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["interleaved-thinking-2025-05-14"], "removed": ["adaptive-thinking-2026-01-28"]…

v2.1.71

Apr 22

trivial Apr 22, 2026

Version bump and temp dir refresh

The version string was incremented from 2.1.70 to 2.1.71 with a new build hash. The ephemeral working directory and auto memory path were updated to a new randomly-generated temp directory, reflecting a fresh sandbox environment.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.70 (external, sdk-cli) -> claude-cli/2.1.71 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.70 (external, sdk-cli)	claude-cli/2.1.71 (external, sdk-cli)

v2.1.70

Apr 22

trivial Apr 22, 2026

Version bump and temp dir refresh

The version identifier was incremented from 2.1.69 to 2.1.70 and the ephemeral working directory and auto-memory path were updated to a new randomly-named temp directory. These are environment-specific runtime values with no semantic behavior change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.69 (external, sdk-cli) -> claude-cli/2.1.70 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.69 (external, sdk-cli)	claude-cli/2.1.70 (external, sdk-cli)

v2.1.69

Apr 22

notable Apr 22, 2026

Memory correction rule enforced

A new explicit rule was added requiring the assistant to immediately update or remove incorrect memory entries when a user issues a correction, preventing the same mistake from recurring in future conversations. The version number and ephemeral temp-directory paths were also bumped to reflect the new environment instance.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / ToolSearchnew tool description
Schema added / ToolSearchnew input schema
Tool removed / Agenttool removed
Schema removed / Agentinput schema removed
Tool removed / AskUserQuestiontool removed
Schema removed / AskUserQuestioninput schema removed
Tool removed / Bashtool removed
Schema removed / Bashinput schema removed
Tool removed / Edittool removed
Schema removed / Editinput schema removed
Tool removed / EnterPlanModetool removed
Schema removed / EnterPlanModeinput schema removed
Tool removed / EnterWorktreetool removed
Schema removed / EnterWorktreeinput schema removed
Tool removed / ExitPlanModetool removed
Schema removed / ExitPlanModeinput schema removed
Tool removed / Globtool removed
Schema removed / Globinput schema removed
Tool removed / Greptool removed
Schema removed / Grepinput schema removed
Tool removed / NotebookEdittool removed
Schema removed / NotebookEditinput schema removed
Tool removed / Readtool removed
Schema removed / Readinput schema removed
Tool removed / Skilltool removed
Schema removed / Skillinput schema removed
Tool removed / TaskOutputtool removed
Schema removed / TaskOutputinput schema removed
Tool removed / TaskStoptool removed
Schema removed / TaskStopinput schema removed
Tool removed / TodoWritetool removed
Schema removed / TodoWriteinput schema removed
Tool removed / WebFetchtool removed
Schema removed / WebFetchinput schema removed
Tool removed / WebSearchtool removed
Schema removed / WebSearchinput schema removed
Tool removed / Writetool removed
Schema removed / Writeinput schema removed
Prompt block / 0+0 chars
Prompt block / 2+262 chars
Header / user_agentclaude-cli/2.1.68 (external, sdk-cli) -> claude-cli/2.1.69 (external, sdk-cli)
Header / anthropic_beta+1 / -1

Split-view diff25 fields changedtools · 20prompts · 3transport · 2

Field	Before	After
toolsToolSearch	—	added
toolsAgent	present	—
toolsAskUserQuestion	present	—
toolsBash	present	—
toolsEdit	present	—
toolsEnterPlanMode	present	—
toolsEnterWorktree	present	—
toolsExitPlanMode	present	—
toolsGlob	present	—
toolsGrep	present	—
toolsNotebookEdit	present	—
toolsRead	present	—
toolsSkill	present	—
toolsTaskOutput	present	—
toolsTaskStop	present	—
toolsTodoWrite	present	—
toolsWebFetch	present	—
toolsWebSearch	present	—
toolsWrite	present	—
toolstool count	18	1
promptstotal prompt size	14,607 chars	14,869 chars (+262)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+262 chars)
transportheader / user_agent	claude-cli/2.1.68 (external, sdk-cli)	claude-cli/2.1.69 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["advanced-tool-use-2025-11-20"], "removed": ["interleaved-thinking-2025-05-14"]…

v2.1.68

Apr 22

trivial Apr 22, 2026

Ephemeral temp path updated

The version string, auto memory directory path, and primary working directory were all updated to reflect a new ephemeral temporary directory (`/tmp/tmp.Q8TZ7oWpYR` replacing `/tmp/tmp.ZwiKhY3XN9`). This is a routine environment refresh with no semantic or behavioral changes to the prompt.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.67 (external, sdk-cli) -> claude-cli/2.1.68 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.67 (external, sdk-cli)	claude-cli/2.1.68 (external, sdk-cli)

v2.1.67

Apr 22

trivial Apr 22, 2026

Version bump and temp dir rotation

The version string was incremented from 2.1.66 to 2.1.67 with an updated build hash. The temporary working directory and auto-memory path were rotated to a new randomly-named temp directory, reflecting a fresh sandbox environment for this version.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.66 (external, sdk-cli) -> claude-cli/2.1.67 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.66 (external, sdk-cli)	claude-cli/2.1.67 (external, sdk-cli)

v2.1.66

Apr 22

trivial Apr 22, 2026

Version bump and temp path refresh

The version identifier was updated from 2.1.64 to 2.1.66, and ephemeral temporary directory paths (used for the working directory and auto memory location) were regenerated to new random values. These are environment-level artifacts of a new session or runner instance and carry no semantic behavior change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription +340 chars
Tool schema / Agentproperties +max_turns, +model
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.64 (external, sdk-cli) -> claude-cli/2.1.66 (external, sdk-cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (+340 chars, +1 lines)
schemasAgent	previous schema	now has: max_turns, model
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.64 (external, sdk-cli)	claude-cli/2.1.66 (external, sdk-cli)

v2.1.64

Apr 22

trivial Apr 22, 2026

Version bump and temp path refresh

The version identifier was incremented from 2.1.63 to 2.1.64, and all references to the ephemeral temporary working directory were updated from `/tmp/tmp.EiTKTFPz5y` to `/tmp/tmp.pZ9kfGvKCj`, including the auto memory path and the primary working directory. No behavioral or instructional content changed.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Agentdescription -340 chars
Tool schema / Agentproperties -max_turns, -model
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.63 (external, sdk-cli) -> claude-cli/2.1.64 (external, sdk-cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsAgent / description	previous description	description changed (-340 chars, -1 lines)
schemasAgent	had: max_turns, model	updated schema
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.63 (external, sdk-cli)	claude-cli/2.1.64 (external, sdk-cli)

v2.1.63

Apr 22

notable Apr 22, 2026

Task tool renamed to Agent; slash-skill added

All references to the "Task tool" were renamed to the "Agent tool" throughout the workflow guidance. A new instruction was added explaining that `/skill-name` slash-commands (e.g., `/commit`) are shorthand for user-invocable skills and must be executed via the Skill tool, with an explicit warning not to guess or use built-in CLI commands. Environment-specific temp directory paths were also rotated as part of a new session.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / Agentnew tool description
Schema added / Agentnew input schema
Tool removed / Tasktool removed
Schema removed / Taskinput schema removed
Tool description / Bashdescription +0 chars
Tool description / EnterPlanModedescription +1 chars
Tool description / Grepdescription +1 chars
Tool description / TodoWritedescription -31 chars
Prompt block / 0+0 chars
Prompt block / 2+311 chars
Header / user_agentclaude-cli/2.1.62 (external, sdk-cli) -> claude-cli/2.1.63 (external, sdk-cli)

Split-view diff10 fields changedtools · 6prompts · 3transport · 1

Field	Before	After
toolsAgent	—	added
toolsTask	present	—
toolsBash / description	previous description	description changed (+0 chars)
toolsEnterPlanMode / description	previous description	description changed (+1 chars)
toolsGrep / description	previous description	description changed (+1 chars)
toolsTodoWrite / description	previous description	description changed (-31 chars)
promptstotal prompt size	14,296 chars	14,607 chars (+311)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+311 chars)
transportheader / user_agent	claude-cli/2.1.62 (external, sdk-cli)	claude-cli/2.1.63 (external, sdk-cli)

v2.1.62

Apr 22

trivial Apr 22, 2026

Version bump and temp dir rotation

The version identifier was incremented from 2.1.61 to 2.1.62 with a new build hash. The ephemeral working directory and auto-memory path were updated to a new randomly-named temp directory, reflecting a fresh sandbox environment instantiation with no semantic changes.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.61 (external, sdk-cli) -> claude-cli/2.1.62 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.61 (external, sdk-cli)	claude-cli/2.1.62 (external, sdk-cli)

v2.1.61

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The version bump from 2.1.59 to 2.1.61 reflects a new ephemeral temp directory (`/tmp/tmp.bY5q0MXXoi` replacing `/tmp/tmp.jabXgUdXwU`), with corresponding updates to the auto memory path and working directory references. No semantic or behavioral changes were made.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.59 (external, sdk-cli) -> claude-cli/2.1.61 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.59 (external, sdk-cli)	claude-cli/2.1.61 (external, sdk-cli)

v2.1.59

Apr 22

major Apr 22, 2026

Adds persistent auto-memory system

A full auto-memory subsystem was introduced, giving the agent a persistent directory at a fixed path where it can store and retrieve notes across conversations. Detailed rules govern what to save (stable patterns, architecture decisions, user preferences), what to avoid (session-specific or speculative content), and how to respond to explicit user memory requests. The working directory was also updated to a new temp path, reflecting a fresh runtime environment.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+1,747 chars
Header / user_agentclaude-cli/2.1.58 (external, sdk-cli) -> claude-cli/2.1.59 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	12,549 chars	14,296 chars (+1,747)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+1,747 chars)
transportheader / user_agent	claude-cli/2.1.58 (external, sdk-cli)	claude-cli/2.1.59 (external, sdk-cli)

v2.1.58

Apr 22

trivial Apr 22, 2026

Version bump and temp directory change

The billing header version string was updated from 2.1.56 to 2.1.58, and the primary working directory path changed to a new temporary directory. Both changes reflect a routine version increment and environment re-instantiation with no semantic behavioral differences.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.56 (external, sdk-cli) -> claude-cli/2.1.58 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.56 (external, sdk-cli)	claude-cli/2.1.58 (external, sdk-cli)

v2.1.56

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was incremented from 2.1.55 to 2.1.56, and the primary working directory path changed to a new temporary directory. Both changes are artifacts of a new session or build and carry no semantic meaning.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.55 (external, sdk-cli) -> claude-cli/2.1.56 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.55 (external, sdk-cli)	claude-cli/2.1.56 (external, sdk-cli)

v2.1.55

Apr 22

trivial Apr 22, 2026

Version bump and temp directory change

The billing header version string was updated from 2.1.54 to 2.1.55, and the primary working directory path changed to a new temporary directory. Both changes reflect routine environment churn with no semantic or behavioral modifications.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.54 (external, sdk-cli) -> claude-cli/2.1.55 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.54 (external, sdk-cli)	claude-cli/2.1.55 (external, sdk-cli)

v2.1.54

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was updated from 2.1.53.495 to 2.1.54.4b6, and the primary working directory path changed to a new temporary directory. Both changes are artifacts of a new runtime invocation and carry no semantic differences.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.53 (external, sdk-cli) -> claude-cli/2.1.54 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.53 (external, sdk-cli)	claude-cli/2.1.54 (external, sdk-cli)

v2.1.53

Apr 22

major Apr 22, 2026

Major prompt restructure and new safety section

The prompt was substantially reorganized into clearly labeled sections (System, Doing tasks, Executing actions with care, Using your tools, Tone and style, Environment), replacing the prior flat structure. A new "Executing actions with care" section was added with explicit guidance on reversibility, blast radius, and confirming risky actions before proceeding. Several verbose sections—including the TodoWrite usage examples, the "Professional objectivity" and "No time estimates" standalone sections, and the CLI-specific self-description—were condensed or folded into other sections.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +189 chars
Tool description / Taskdescription -103 chars
Tool description / Writedescription -4 chars
Prompt block / 0+0 chars
Prompt block / 2-270 chars
Header / user_agentclaude-cli/2.1.52 (external, sdk-cli) -> claude-cli/2.1.53 (external, sdk-cli)

Split-view diff7 fields changedtools · 3prompts · 3transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+189 chars, -9 lines)
toolsTask / description	previous description	description changed (-103 chars, -1 lines)
toolsWrite / description	previous description	description changed (-4 chars)
promptstotal prompt size	12,819 chars	12,549 chars (-270)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-270 chars)
transportheader / user_agent	claude-cli/2.1.52 (external, sdk-cli)	claude-cli/2.1.53 (external, sdk-cli)

v2.1.52

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header was updated to reflect the new version string (2.1.52.7f8), and the working directory path changed to a new temporary directory. Both changes are artifacts of a new build/session and carry no semantic difference.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.51 (external, sdk-cli) -> claude-cli/2.1.52 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.51 (external, sdk-cli)	claude-cli/2.1.52 (external, sdk-cli)

v2.1.51

Apr 22

notable Apr 22, 2026

Slash-command skill instruction removed

The explicit instruction describing slash-command shorthand (e.g., `/commit`) and directing the assistant to use the Skill tool for user-invocable skills was removed from the tool usage policy. The version header and working directory path also changed, reflecting a new build and ephemeral runtime environment.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / EnterWorktreenew tool description
Schema added / EnterWorktreenew input schema
Prompt block / 0+0 chars
Prompt block / 2-308 chars
Header / user_agentclaude-cli/2.1.50 (external, sdk-cli) -> claude-cli/2.1.51 (external, sdk-cli)

Split-view diff6 fields changedprompts · 3tools · 2transport · 1

Field	Before	After
toolsEnterWorktree	—	added
toolstool count	17	18
promptstotal prompt size	13,127 chars	12,819 chars (-308)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-308 chars)
transportheader / user_agent	claude-cli/2.1.50 (external, sdk-cli)	claude-cli/2.1.51 (external, sdk-cli)

v2.1.50

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was incremented from 2.1.49 to 2.1.50, and the working directory path changed to a new temporary directory. Both changes are artifacts of a new build/run environment and carry no semantic behavior change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool schema / ExitPlanModeproperties -pushToRemote, -remoteSessionId, -remoteSessionTitle, -remoteSessionUrl
Tool description / Taskdescription +291 chars
Tool schema / Taskproperties +isolation
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.49 (external, sdk-cli) -> claude-cli/2.1.50 (external, sdk-cli)

Split-view diff6 fields changedschemas · 2prompts · 2tools · 1transport · 1

Field	Before	After
schemasExitPlanMode	had: pushToRemote, remoteSessionId, remoteSessionTitle, remoteSessionUrl	updated schema
toolsTask / description	previous description	description changed (+291 chars, +1 lines)
schemasTask	previous schema	now has: isolation
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.49 (external, sdk-cli)	claude-cli/2.1.50 (external, sdk-cli)

v2.1.49

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was updated from 2.1.48.283 to 2.1.49.7ea, and the working directory reference changed to a new temporary path. Both changes are artifacts of a routine version increment with no semantic or behavioral differences.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.48 (external, sdk-cli) -> claude-cli/2.1.49 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.48 (external, sdk-cli)	claude-cli/2.1.49 (external, sdk-cli)

v2.1.48

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was incremented from 2.1.47.b96 to 2.1.48.283, and the working directory path was updated to a new temporary directory. Both changes reflect routine environment reinitialization with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +122 chars
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.47 (external, sdk-cli) -> claude-cli/2.1.48 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff5 fields changedprompts · 2transport · 2tools · 1

Field	Before	After
toolsTask / description	previous description	description changed (+122 chars, +1 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.47 (external, sdk-cli)	claude-cli/2.1.48 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["interleaved-thinking-2025-05-14"], "removed": []}

v2.1.47

Apr 22

notable Apr 22, 2026

Adds slash-command skill invocation rule

A new tool-use policy line was added instructing the assistant to treat `/<skill-name>` shorthand (e.g., `/commit`) as user-invocable skills that must be executed via the Skill tool, with an explicit warning not to guess or substitute built-in CLI commands. The working directory path and billing header version were also bumped, reflecting a new runtime snapshot.

ModelPromptsToolsTransport

Change details

Changed artifacts

Tool description / AskUserQuestiondescription +261 chars
Prompt block / 0+0 chars
Prompt block / 2+308 chars
Model setting / temperature1 -> null
Model setting / thinkingnull -> {"type": "adaptive"}
Header / user_agentclaude-cli/2.1.45 (external, sdk-cli) -> claude-cli/2.1.47 (external, sdk-cli)

Split-view diff7 fields changedprompts · 3model · 2tools · 1transport · 1

Field	Before	After
toolsAskUserQuestion / description	previous description	description changed (+261 chars)
promptstotal prompt size	12,819 chars	13,127 chars (+308)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+308 chars)
modeltemperature	1	null
modelthinking	null	{"type": "adaptive"}
transportheader / user_agent	claude-cli/2.1.45 (external, sdk-cli)	claude-cli/2.1.47 (external, sdk-cli)

v2.1.45

Apr 22

notable Apr 22, 2026

Upgrades to Sonnet 4.6 model

The underlying model was updated from claude-sonnet-4-5-20250929 (Sonnet 4.5) to claude-sonnet-4-6 (Sonnet 4.6). The knowledge cutoff was extended from January 2025 to August 2025. The working directory and billing version header were also updated to reflect the new build.

ModelPromptsSchemasToolsTransport

Change details

Changed artifacts

Tool schema / AskUserQuestionproperties +annotations
Tool description / Bashdescription +0 chars
Prompt block / 0+0 chars
Prompt block / 2-10 chars
Model setting / modelclaude-sonnet-4-5-20250929 -> claude-sonnet-4-6
Header / user_agentclaude-cli/2.1.44 (external, sdk-cli) -> claude-cli/2.1.45 (external, sdk-cli)
Header / anthropic_beta+2 / -1

Split-view diff8 fields changedprompts · 3transport · 2schemas · 1tools · 1model · 1

Field	Before	After
schemasAskUserQuestion	previous schema	now has: annotations
toolsBash / description	previous description	description changed (+0 chars)
promptstotal prompt size	12,829 chars	12,819 chars (-10)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-10 chars)
modelmodel	claude-sonnet-4-5-20250929	claude-sonnet-4-6
transportheader / user_agent	claude-cli/2.1.44 (external, sdk-cli)	claude-cli/2.1.45 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["adaptive-thinking-2026-01-28", "effort-2025-11-24"], "removed": ["interleaved-…

v2.1.44

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was updated from 2.1.42.834 to 2.1.44.457, and the working directory path changed from one temporary directory to another. Both changes are artifacts of a new build/run environment and carry no semantic difference.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.42 (external, sdk-cli) -> claude-cli/2.1.44 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.42 (external, sdk-cli)	claude-cli/2.1.44 (external, sdk-cli)

v2.1.42

Apr 22

minor Apr 22, 2026

Version bump with env snapshot refresh

The version header was incremented from 2.1.41 to 2.1.42 and the environment block was refreshed with a new working directory temp path. The shell field was added (zsh) while the "Today's date" field was removed from the env snapshot.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / WebSearchdescription +5 chars
Prompt block / 0+0 chars
Prompt block / 2-14 chars
Header / user_agentclaude-cli/2.1.41 (external, sdk-cli) -> claude-cli/2.1.42 (external, sdk-cli)

Split-view diff5 fields changedprompts · 3tools · 1transport · 1

Field	Before	After
toolsWebSearch / description	previous description	description changed (+5 chars)
promptstotal prompt size	12,843 chars	12,829 chars (-14)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-14 chars)
transportheader / user_agent	claude-cli/2.1.41 (external, sdk-cli)	claude-cli/2.1.42 (external, sdk-cli)

v2.1.41

Apr 22

notable Apr 22, 2026

Explore tool guidance softened

The instruction to use the Task tool with `subagent_type=Explore` was changed from a "VERY IMPORTANT / CRITICAL" mandatory directive into a conditional recommendation, now advising its use only when a simple directed search is insufficient or when more than 3 queries are clearly needed. This gives the assistant more flexibility to use faster tools like Glob or Grep directly for straightforward lookups. The working directory path was also updated to a new temp value, reflecting a fresh environment snapshot.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+18 chars
Header / user_agentclaude-cli/2.1.40 (external, sdk-cli) -> claude-cli/2.1.41 (external, sdk-cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	12,825 chars	12,843 chars (+18)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+18 chars)
transportheader / user_agent	claude-cli/2.1.40 (external, sdk-cli)	claude-cli/2.1.41 (external, sdk-cli)

v2.1.40

Apr 22

trivial Apr 22, 2026

Version bump and entrypoint rename

The billing header was updated to reflect the new version (2.1.40) and the entrypoint label changed from `cli` to `sdk-cli`. The working directory path also changed, which is a routine ephemeral environment difference between runs.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription -604 chars
Prompt block / 0+4 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.39 (external, cli) -> claude-cli/2.1.40 (external, sdk-cli)

Split-view diff5 fields changedprompts · 3tools · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (-604 chars, -1 lines)
promptstotal prompt size	12,821 chars	12,825 chars (+4)
promptsblock 0	previous text	text changed (+4 chars)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.39 (external, cli)	claude-cli/2.1.40 (external, sdk-cli)

v2.1.39

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

Updated the billing header version string from 2.1.38 to 2.1.39 and changed the working directory path to a new temporary directory. Both changes are purely environmental and carry no semantic difference in behavior.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / Bashproperties -_simulatedSedEdit
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.38 (external, cli) -> claude-cli/2.1.39 (external, cli)

Split-view diff4 fields changedprompts · 2schemas · 1transport · 1

Field	Before	After
schemasBash	had: _simulatedSedEdit	updated schema
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.38 (external, cli)	claude-cli/2.1.39 (external, cli)

v2.1.38

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was updated from 2.1.37 to 2.1.38 and the working directory path changed to a new temporary directory, both consistent with a routine version increment. No semantic or behavioral changes were made.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -1 chars
Tool description / Taskdescription -4 chars
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.37 (external, cli) -> claude-cli/2.1.38 (external, cli)

Split-view diff5 fields changedtools · 2prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-1 chars)
toolsTask / description	previous description	description changed (-4 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.37 (external, cli)	claude-cli/2.1.38 (external, cli)

v2.1.37

Apr 22

trivial Apr 22, 2026

Version bump and temp dir update

The billing header version string was incremented from 2.1.36 to 2.1.37, and the working directory path changed to a new temporary directory. Both changes are purely environmental artifacts of a new build/run and carry no semantic difference.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.36 (external, cli) -> claude-cli/2.1.37 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.36 (external, cli)	claude-cli/2.1.37 (external, cli)

v2.1.36

Apr 22

notable Apr 22, 2026

Adds fast mode info block

A new `<fast_mode_info>` section was added clarifying that fast mode uses the same Claude Opus 4.6 model with faster output rather than a different model, and that it can be toggled with `/fast`. The billing header was also updated to include a new `cch` field alongside the version bump. The working directory reference changed, which is a routine ephemeral environment detail.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+11 chars
Prompt block / 2+189 chars
Header / user_agentclaude-cli/2.1.34 (external, cli) -> claude-cli/2.1.36 (external, cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	12,621 chars	12,821 chars (+200)
promptsblock 0	previous text	text changed (+11 chars)
promptsblock 2	previous text	text changed (+189 chars)
transportheader / user_agent	claude-cli/2.1.34 (external, cli)	claude-cli/2.1.36 (external, cli)

v2.1.34

Apr 22

trivial Apr 22, 2026

Version bump and temp directory change

The billing header version was updated from 2.1.33.355 to 2.1.34.8b4, and the working directory path changed to a new temporary directory. Both changes are artifacts of a routine version increment with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.33 (external, cli) -> claude-cli/2.1.34 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.33 (external, cli)	claude-cli/2.1.34 (external, cli)

v2.1.33

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was incremented from 2.1.32.1b5 to 2.1.33.355, and the working directory path changed to a new temporary directory. Both changes reflect a routine version update with no semantic behavior changes.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool schema / Editschema changed
Tool description / Taskdescription -475 chars
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.32 (external, cli) -> claude-cli/2.1.33 (external, cli)

Split-view diff5 fields changedprompts · 2schemas · 1tools · 1transport · 1

Field	Before	After
schemasEdit	previous schema	updated schema
toolsTask / description	previous description	description changed (-475 chars, -1 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.32 (external, cli)	claude-cli/2.1.33 (external, cli)

v2.1.32

Apr 22

minor Apr 22, 2026

Claude Opus 4.6 model reference update

The most recent frontier model reference was updated from Claude Opus 4.5 (`claude-opus-4-5-20251101`) to Claude Opus 4.6 (`claude-opus-4-6`), reflecting a new model release. The version string in the billing header and the working directory path also changed, both of which are routine per-run artifacts.

PromptsTransport

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2-9 chars
Header / user_agentclaude-cli/2.1.31 (external, cli) -> claude-cli/2.1.32 (external, cli)

Split-view diff4 fields changedprompts · 3transport · 1

Field	Before	After
promptstotal prompt size	12,630 chars	12,621 chars (-9)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-9 chars)
transportheader / user_agent	claude-cli/2.1.31 (external, cli)	claude-cli/2.1.32 (external, cli)

v2.1.31

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was updated from 2.1.30 to 2.1.31, and the working directory path changed to a new temporary directory. Both changes reflect a routine version increment with no semantic or behavioral modifications.

ModelPromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +475 chars
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Model setting / temperaturenull -> 1
Header / user_agentclaude-cli/2.1.30 (external, cli) -> claude-cli/2.1.31 (external, cli)

Split-view diff5 fields changedprompts · 2tools · 1model · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+475 chars, +1 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
modeltemperature	null	1
transportheader / user_agent	claude-cli/2.1.30 (external, cli)	claude-cli/2.1.31 (external, cli)

v2.1.30

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was updated from 2.1.29 to 2.1.30, and the working directory path changed to a new temporary directory. Both are routine snapshot-level changes with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Readdescription +127 chars
Tool schema / Readproperties +pages
Tool description / Taskdescription -1 chars
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.29 (external, cli) -> claude-cli/2.1.30 (external, cli)

Split-view diff6 fields changedtools · 2prompts · 2schemas · 1transport · 1

Field	Before	After
toolsRead / description	previous description	description changed (+127 chars)
schemasRead	previous schema	now has: pages
toolsTask / description	previous description	description changed (-1 chars)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.29 (external, cli)	claude-cli/2.1.30 (external, cli)

v2.1.29

Apr 22

trivial Apr 22, 2026

Version and temp directory bump

The billing header version string was updated from 2.1.28 to 2.1.29 and the working directory path changed to a new temporary directory, both reflecting a routine version increment with no semantic changes to prompt behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.28 (external, cli) -> claude-cli/2.1.29 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.28 (external, cli)	claude-cli/2.1.29 (external, cli)

v2.1.28

Apr 22

trivial Apr 22, 2026

Version bump and temp dir refresh

The billing header version string was updated from 2.1.27.278 to 2.1.28.fc6, and the working directory path changed to a new temporary directory. Both are routine snapshot-level changes with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.27 (external, cli) -> claude-cli/2.1.28 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.27 (external, cli)	claude-cli/2.1.28 (external, cli)

v2.1.27

Apr 22

trivial Apr 22, 2026

Version and temp directory bump

The billing header version string was updated from 2.1.26.641 to 2.1.27.278, and the ephemeral working directory path changed to a new temp folder. Both changes are artifacts of a routine version increment and environment reset with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.26 (external, cli) -> claude-cli/2.1.27 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.26 (external, cli)	claude-cli/2.1.27 (external, cli)

v2.1.26

Apr 22

trivial Apr 22, 2026

Version bump and temp dir update

The billing header version string was incremented from 2.1.25.28a to 2.1.26.641, and the ephemeral working directory path changed to a new temp folder. Both changes are artifacts of a routine version release with no semantic or behavioral differences.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.25 (external, cli) -> claude-cli/2.1.26 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.25 (external, cli)	claude-cli/2.1.26 (external, cli)

v2.1.25

Apr 22

trivial Apr 22, 2026

Version bump and temp dir update

The billing header version string was incremented from 2.1.23.79b to 2.1.25.28a, and the working directory path changed from one ephemeral temp directory to another. Both changes are artifacts of a routine version bump and environment refresh with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.23 (external, cli) -> claude-cli/2.1.25 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.23 (external, cli)	claude-cli/2.1.25 (external, cli)

v2.1.23

Apr 22

notable Apr 22, 2026

Security policy expanded beyond defensive-only

The security guidance rule was rewritten in both its header and mid-prompt positions to permit authorized offensive security work — including CTF challenges, pentesting engagements, and dual-use tool development — provided a clear authorization context is given. The previous blanket "defensive tasks only" stance is replaced with a nuanced allow/deny list that still prohibits destructive techniques, DoS, mass targeting, supply chain compromise, and malicious detection evasion. A routine working-directory path and version string were also bumped.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Skilldescription -336 chars
Prompt block / 0+0 chars
Prompt block / 2+165 chars
Header / user_agentclaude-cli/2.1.22 (external, cli) -> claude-cli/2.1.23 (external, cli)
Header / anthropic_beta+1

Split-view diff6 fields changedprompts · 3transport · 2tools · 1

Field	Before	After
toolsSkill / description	previous description	description changed (-336 chars, -8 lines)
promptstotal prompt size	12,465 chars	12,630 chars (+165)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (+165 chars)
transportheader / user_agent	claude-cli/2.1.22 (external, cli)	claude-cli/2.1.23 (external, cli)
transportheader / anthropic_beta	—	{"added": ["prompt-caching-scope-2026-01-05"], "removed": []}

v2.1.22

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was incremented from 2.1.21.917 to 2.1.22.039, and the working directory path changed from one ephemeral temp directory to another. Both changes are artifacts of a new build/run cycle with no semantic difference.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.21 (external, cli) -> claude-cli/2.1.22 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.21 (external, cli)	claude-cli/2.1.22 (external, cli)

v2.1.21

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header was updated from version 2.1.20 to 2.1.21 (with a trailing semicolon added), and the working directory path changed to a new temporary directory. Both changes reflect routine snapshot/environment differences with no semantic impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / Grepproperties +context
Prompt block / 0+1 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.20 (external, cli) -> claude-cli/2.1.21 (external, cli)

Split-view diff5 fields changedprompts · 3schemas · 1transport · 1

Field	Before	After
schemasGrep	previous schema	now has: context
promptstotal prompt size	12,464 chars	12,465 chars (+1)
promptsblock 0	previous text	text changed (+1 chars)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.20 (external, cli)	claude-cli/2.1.21 (external, cli)

v2.1.20

Apr 22

notable Apr 22, 2026

Security policy tightened to defensive-only

The security guidance was significantly narrowed: the previous policy permitted dual-use tools (C2 frameworks, credential testing, exploit development) given clear authorization context such as pentesting or CTF engagements, but the new policy restricts assistance to defensive security tasks only and explicitly forbids credential discovery, harvesting, and any code that could be used maliciously. The duplicate security policy block at the bottom of the prompt was also updated to match. Several blank lines were removed throughout the document, and the working directory temp path was updated.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +119 chars
Tool description / Editdescription -2 chars
Tool schema / Taskproperties -allowed_tools
Prompt block / 0+0 chars
Prompt block / 2-173 chars
Header / user_agentclaude-cli/2.1.19 (external, cli) -> claude-cli/2.1.20 (external, cli)

Split-view diff7 fields changedprompts · 3tools · 2schemas · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+119 chars, +2 lines)
toolsEdit / description	previous description	description changed (-2 chars)
schemasTask	had: allowed_tools	updated schema
promptstotal prompt size	12,637 chars	12,464 chars (-173)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (-173 chars)
transportheader / user_agent	claude-cli/2.1.19 (external, cli)	claude-cli/2.1.20 (external, cli)

v2.1.19

Apr 22

trivial Apr 22, 2026

Version bump and temp dir update

The billing header version string was incremented from 2.1.18 to 2.1.19 and the build token changed from `ecb` to `b18`. The working directory path was updated to a new temporary directory, reflecting a fresh environment snapshot.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / TaskStopnew tool description
Schema added / TaskStopnew input schema
Tool removed / KillShelltool removed
Schema removed / KillShellinput schema removed
Tool schema / ExitPlanModeproperties -launchSwarm, -teammateCount
Tool description / Skilldescription -2 chars
Tool schema / Taskproperties +allowed_tools / properties -mode, -name, -team_name
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.18 (external, cli) -> claude-cli/2.1.19 (external, cli)

Split-view diff8 fields changedtools · 3schemas · 2prompts · 2transport · 1

Field	Before	After
toolsTaskStop	—	added
toolsKillShell	present	—
schemasExitPlanMode	had: launchSwarm, teammateCount	updated schema
toolsSkill / description	previous description	description changed (-2 chars)
schemasTask	had: mode, name, team_name	now has: allowed_tools
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.18 (external, cli)	claude-cli/2.1.19 (external, cli)

v2.1.18

Apr 22

trivial Apr 22, 2026

Version and temp directory bump

The billing header version string was updated from 2.1.17 to 2.1.18, and the working directory path changed to a new temporary directory. Both changes are artifacts of a routine version increment with no semantic or behavioral differences.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.17 (external, cli) -> claude-cli/2.1.18 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.17 (external, cli)	claude-cli/2.1.18 (external, cli)

v2.1.17

Apr 22

trivial Apr 22, 2026

Version bump and temp dir change

The billing header version string was incremented from 2.1.16 to 2.1.17 with a new build hash, and the working directory path changed to a new temporary directory. Both changes are artifacts of a version/environment refresh with no semantic behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.16 (external, cli) -> claude-cli/2.1.17 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.16 (external, cli)	claude-cli/2.1.17 (external, cli)

v2.1.16

Apr 22

trivial Apr 22, 2026

Version bump and temp dir update

The billing header version string was incremented from 2.1.15 to 2.1.16, and the working directory path changed to a new temporary directory. Both changes are artifacts of a new build/run environment and carry no semantic difference.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +120 chars
Tool schema / ExitPlanModeproperties +launchSwarm, +teammateCount
Tool schema / Taskproperties +mode, +name, +team_name
Tool description / WebFetchdescription +287 chars
Prompt block / 0+0 chars
Prompt block / 2+0 chars
Header / user_agentclaude-cli/2.1.15 (external, cli) -> claude-cli/2.1.16 (external, cli)

Split-view diff7 fields changedtools · 2schemas · 2prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+120 chars, +1 lines)
schemasExitPlanMode	previous schema	now has: launchSwarm, teammateCount
schemasTask	previous schema	now has: mode, name, team_name
toolsWebFetch / description	previous description	description changed (+287 chars, +1 lines)
promptsblock 0	previous text	text changed (0 chars net)
promptsblock 2	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.15 (external, cli)	claude-cli/2.1.16 (external, cli)

v2.1.15

Apr 22

minor Apr 22, 2026

Billing header added, temp dir bumped

A new `x-anthropic-billing-header` metadata line was added at the top of the prompt, encoding the version and entrypoint for billing/tracking purposes. The working directory path was also updated to a new temporary directory, reflecting a fresh runtime environment snapshot.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +624 chars
Prompt block / 0+6 chars
Prompt block / 1-12,445 chars
Prompt block / 2added
Header / user_agentclaude-cli/2.1.14 (external, cli) -> claude-cli/2.1.15 (external, cli)

Split-view diff6 fields changedprompts · 4tools · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+624 chars, +1 lines)
promptstotal prompt size	12,569 chars	12,637 chars (+68)
promptsblock 0	previous text · cache=ephemeral	text changed (+6 chars) · cache=none
promptsblock 1	previous text	text changed (-12,445 chars)
promptsblock 2	—	new prompt block
transportheader / user_agent	claude-cli/2.1.14 (external, cli)	claude-cli/2.1.15 (external, cli)

v2.1.14

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.0JC79suud0` to `/tmp/tmp.pUYjO4ANag`, reflecting a new randomly-generated temporary directory for the runner session. This is a routine environment value refresh with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +83 chars
Tool description / ExitPlanModedescription -2,066 chars
Tool schema / ExitPlanModeproperties +remoteSessionTitle
Tool description / WebFetchdescription +105 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.12 (external, cli) -> claude-cli/2.1.14 (external, cli)

Split-view diff6 fields changedtools · 3schemas · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+83 chars)
toolsExitPlanMode / description	previous description	description changed (-2,066 chars, -35 lines)
schemasExitPlanMode	previous schema	now has: remoteSessionTitle
toolsWebFetch / description	previous description	description changed (+105 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.12 (external, cli)	claude-cli/2.1.14 (external, cli)

v2.1.12

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.hTpuX5qqGy` to `/tmp/tmp.0JC79suud0`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated value with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.11 (external, cli) -> claude-cli/2.1.12 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.11 (external, cli)	claude-cli/2.1.12 (external, cli)

v2.1.11

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.FLBgpOUzyu` to `/tmp/tmp.hTpuX5qqGy`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value refresh with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.10 (external, cli) -> claude-cli/2.1.11 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.10 (external, cli)	claude-cli/2.1.11 (external, cli)

v2.1.10

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.cD5UtsWPBO` to `/tmp/tmp.FLBgpOUzyu`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated value with no semantic impact on behavior.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -520 chars
Tool schema / ExitPlanModeproperties +pushToRemote, +remoteSessionId, +remoteSessionUrl
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.9 (external, cli) -> claude-cli/2.1.10 (external, cli)

Split-view diff4 fields changedtools · 1schemas · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-520 chars, -5 lines)
schemasExitPlanMode	previous schema	now has: pushToRemote, remoteSessionId, remoteSessionUrl
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.9 (external, cli)	claude-cli/2.1.10 (external, cli)

v2.1.9

Apr 22

notable Apr 22, 2026

Expanded no-time-estimates rule

The "Planning without timelines" section was renamed to "No time estimates" and broadened to prohibit any time predictions — including for the assistant's own work (e.g., "this will take me a few minutes," "quick fix") — not just project-level scheduling suggestions. The working directory path was also updated to a new temp directory, which is a routine environment refresh.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+157 chars
Header / user_agentclaude-cli/2.1.8 (external, cli) -> claude-cli/2.1.9 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,412 chars	12,569 chars (+157)
promptsblock 1	previous text	text changed (+157 chars)
transportheader / user_agent	claude-cli/2.1.8 (external, cli)	claude-cli/2.1.9 (external, cli)

v2.1.8

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.Vg5Ade61Gb` to `/tmp/tmp.OxGUcKdiA0`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / WebSearchdescription -24 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.7 (external, cli) -> claude-cli/2.1.8 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsWebSearch / description	previous description	description changed (-24 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.7 (external, cli)	claude-cli/2.1.8 (external, cli)

v2.1.7

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.aSSNZapoKK` to `/tmp/tmp.Vg5Ade61Gb`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an incidental snapshot value with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +106 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.6 (external, cli) -> claude-cli/2.1.7 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+106 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.6 (external, cli)	claude-cli/2.1.7 (external, cli)

v2.1.6

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.dVyitsSL0Y` to `/tmp/tmp.aSSNZapoKK`, reflecting a new ephemeral temp directory for the runner. This is an auto-generated path with no semantic significance.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / ExitPlanModedescription +2,066 chars
Tool schema / ExitPlanModeproperties +allowedPrompts
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.5 (external, cli) -> claude-cli/2.1.6 (external, cli)

Split-view diff4 fields changedtools · 1schemas · 1prompts · 1transport · 1

Field	Before	After
toolsExitPlanMode / description	previous description	description changed (+2,066 chars, +35 lines)
schemasExitPlanMode	previous schema	now has: allowedPrompts
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.5 (external, cli)	claude-cli/2.1.6 (external, cli)

v2.1.5

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.b8fsf0RGZg` to `/tmp/tmp.dVyitsSL0Y`. This is a routine change reflecting a new ephemeral temp directory and carries no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.4 (external, cli) -> claude-cli/2.1.5 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.4 (external, cli)	claude-cli/2.1.5 (external, cli)

v2.1.4

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.RNLLS7CRdl` to `/tmp/tmp.b8fsf0RGZg`, reflecting a new randomly-generated temp directory for this runner session. This is a routine environment value update with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +3 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.3 (external, cli) -> claude-cli/2.1.4 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+3 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.3 (external, cli)	claude-cli/2.1.4 (external, cli)

v2.1.3

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.SjJwAoqubs` to `/tmp/tmp.RNLLS7CRdl`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool schema / AskUserQuestionproperties +metadata
Tool description / Bashdescription +282 chars
Tool schema / Bashproperties +_simulatedSedEdit
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.2 (external, cli) -> claude-cli/2.1.3 (external, cli)

Split-view diff5 fields changedschemas · 2tools · 1prompts · 1transport · 1

Field	Before	After
schemasAskUserQuestion	previous schema	now has: metadata
toolsBash / description	previous description	description changed (+282 chars)
schemasBash	previous schema	now has: _simulatedSedEdit
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.2 (external, cli)	claude-cli/2.1.3 (external, cli)

v2.1.2

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.SDxZ2Ftwni` to `/tmp/tmp.SjJwAoqubs`, reflecting a new ephemeral temp directory for this session. This is a routine runtime value change with no semantic impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / Taskproperties +max_turns
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.1 (external, cli) -> claude-cli/2.1.2 (external, cli)

Split-view diff3 fields changedschemas · 1prompts · 1transport · 1

Field	Before	After
schemasTask	previous schema	now has: max_turns
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.1 (external, cli)	claude-cli/2.1.2 (external, cli)

v2.1.1

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.Hw8eWc2ecy` to `/tmp/tmp.SDxZ2Ftwni`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.1.0 (external, cli) -> claude-cli/2.1.1 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.1.0 (external, cli)	claude-cli/2.1.1 (external, cli)

v2.1.0

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.z3Iyjy5kxY` to `/tmp/tmp.Hw8eWc2ecy`, reflecting a new randomly generated temporary directory. This is a runtime environment value with no semantic impact on behavior.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool removed / LSPtool removed
Schema removed / LSPinput schema removed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.77 (external, cli) -> claude-cli/2.1.0 (external, cli)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsLSP	present	—
toolstool count	18	17
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.77 (external, cli)	claude-cli/2.1.0 (external, cli)

v2.0.77

Apr 22

notable Apr 22, 2026

Remove doc-lookup agent, add colon-before-tool rule

The self-documentation lookup block — which directed Claude to use a `claude-code-guide` subagent when users asked about Claude Code features or the Agent SDK — was removed entirely. A new style rule was added instructing the model not to place a colon before tool calls, since tool output may not be visible in the rendered response. A stale working-directory path was also refreshed.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / AskUserQuestiondescription +236 chars
Tool schema / AskUserQuestionschema changed
Tool description / Bashdescription -67 chars
Tool schema / Bashschema changed
Tool schema / Editschema changed
Tool schema / EnterPlanModeschema changed
Tool description / ExitPlanModedescription -79 chars
Tool schema / ExitPlanModeschema changed
Tool schema / Globschema changed
Tool schema / Grepschema changed
Tool schema / KillShellschema changed
Tool schema / LSPschema changed
Tool schema / NotebookEditschema changed
Tool schema / Readschema changed
Tool description / Skilldescription +191 chars
Tool schema / Skillschema changed
Tool description / Taskdescription +140 chars
Tool schema / Taskschema changed
Tool schema / TaskOutputrequired changed
Tool schema / TodoWriteschema changed
Tool schema / WebFetchschema changed
Tool schema / WebSearchschema changed
Tool schema / Writeschema changed
Prompt block / 1-501 chars
Header / user_agentclaude-cli/2.0.76 (external, cli) -> claude-cli/2.0.77 (external, cli)

Split-view diff26 fields changedschemas · 18tools · 5prompts · 2transport · 1

Field	Before	After
toolsAskUserQuestion / description	previous description	description changed (+236 chars, +2 lines)
schemasAskUserQuestion	previous schema	updated schema
toolsBash / description	previous description	description changed (-67 chars, -4 lines)
schemasBash	previous schema	updated schema
schemasEdit	previous schema	updated schema
schemasEnterPlanMode	previous schema	updated schema
toolsExitPlanMode / description	previous description	description changed (-79 chars, -1 lines)
schemasExitPlanMode	previous schema	updated schema
schemasGlob	previous schema	updated schema
schemasGrep	previous schema	updated schema
schemasKillShell	previous schema	updated schema
schemasLSP	previous schema	updated schema
schemasNotebookEdit	previous schema	updated schema
schemasRead	previous schema	updated schema
toolsSkill / description	previous description	description changed (+191 chars, -3 lines)
schemasSkill	previous schema	updated schema
toolsTask / description	previous description	description changed (+140 chars, +1 lines)
schemasTask	previous schema	updated schema
schemasTaskOutput	required list changed	required list changed
schemasTodoWrite	previous schema	updated schema
schemasWebFetch	previous schema	updated schema
schemasWebSearch	previous schema	updated schema
schemasWrite	previous schema	updated schema
promptstotal prompt size	12,913 chars	12,412 chars (-501)
promptsblock 1	previous text	text changed (-501 chars)
transportheader / user_agent	claude-cli/2.0.76 (external, cli)	claude-cli/2.0.77 (external, cli)

v2.0.76

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.WkDvEUSyAP` to `/tmp/tmp.bzqoRjKtT8`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.75 (external, cli) -> claude-cli/2.0.76 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.75 (external, cli)	claude-cli/2.0.76 (external, cli)

v2.0.75

Apr 22

minor Apr 22, 2026

Remove colon-before-tool-call rule

The instruction prohibiting colons immediately before tool calls ("Let me read the file:" → "Let me read the file.") was removed from the formatting guidelines. The working directory path was also updated to a new temp directory, which is a routine environmental change.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-217 chars
Header / user_agentclaude-cli/2.0.74 (external, cli) -> claude-cli/2.0.75 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,130 chars	12,913 chars (-217)
promptsblock 1	previous text	text changed (-217 chars)
transportheader / user_agent	claude-cli/2.0.74 (external, cli)	claude-cli/2.0.75 (external, cli)

v2.0.74

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.qOkV3IqaXG` to `/tmp/tmp.E3pfNuAFbS`, reflecting a new temporary session directory. This is an automated environment value update with no semantic or behavioral change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / LSPnew tool description
Schema added / LSPnew input schema
Tool description / Bashdescription -369 chars
Tool schema / ExitPlanModeproperties -launchSwarm, -teammateCount
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.73 (external, cli) -> claude-cli/2.0.74 (external, cli)

Split-view diff6 fields changedtools · 3schemas · 1prompts · 1transport · 1

Field	Before	After
toolsLSP	—	added
toolsBash / description	previous description	description changed (-369 chars, -5 lines)
schemasExitPlanMode	had: launchSwarm, teammateCount	updated schema
toolstool count	17	18
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.73 (external, cli)	claude-cli/2.0.74 (external, cli)

v2.0.73

Apr 22

notable Apr 22, 2026

Remove task-completion mandate, minor wording updates

The prominent "IMPORTANT" directive instructing the assistant to never stop mid-task and always claim unlimited context was removed entirely. The example for using a specific Claude Code feature was updated from "write a slash command" to "write a skill", and the working directory path was refreshed to a new temp directory.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool removed / SlashCommandtool removed
Schema removed / SlashCommandinput schema removed
Tool description / Skilldescription +368 chars
Tool schema / Skillproperties +args
Prompt block / 1-298 chars
Header / user_agentclaude-cli/2.0.72 (external, cli) -> claude-cli/2.0.73 (external, cli)

Split-view diff7 fields changedtools · 3prompts · 2schemas · 1transport · 1

Field	Before	After
toolsSlashCommand	present	—
toolsSkill / description	previous description	description changed (+368 chars, +8 lines)
schemasSkill	previous schema	now has: args
toolstool count	18	17
promptstotal prompt size	13,428 chars	13,130 chars (-298)
promptsblock 1	previous text	text changed (-298 chars)
transportheader / user_agent	claude-cli/2.0.72 (external, cli)	claude-cli/2.0.73 (external, cli)

v2.0.72

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.36dukfwfFF` to `/tmp/tmp.mpUpQXM1wE`, reflecting a new ephemeral temp directory for this version's runtime snapshot. This is an automatically generated path with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +84 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.71 (external, cli) -> claude-cli/2.0.72 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+84 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.71 (external, cli)	claude-cli/2.0.72 (external, cli)

v2.0.71

Apr 22

notable Apr 22, 2026

AskUserQuestion tool formally introduced

A new dedicated section on asking questions was added, documenting the AskUserQuestion tool and instructing the assistant to use it for clarification, assumption validation, and decision-making. The previously empty workflow bullet for gathering information was replaced with an explicit directive to use this tool. A working-directory path was also bumped, which is a trivial environment change.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / AskUserQuestionnew tool description
Schema added / AskUserQuestionnew input schema
Tool description / Bashdescription +426 chars
Prompt block / 1+422 chars
Header / user_agentclaude-cli/2.0.70 (external, cli) -> claude-cli/2.0.71 (external, cli)

Split-view diff6 fields changedtools · 3prompts · 2transport · 1

Field	Before	After
toolsAskUserQuestion	—	added
toolsBash / description	previous description	description changed (+426 chars, +6 lines)
toolstool count	17	18
promptstotal prompt size	13,006 chars	13,428 chars (+422)
promptsblock 1	previous text	text changed (+422 chars)
transportheader / user_agent	claude-cli/2.0.70 (external, cli)	claude-cli/2.0.71 (external, cli)

v2.0.70

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.mn3WJcPrrR` to `/tmp/tmp.TKMgpD5llf`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.69 (external, cli) -> claude-cli/2.0.70 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.69 (external, cli)	claude-cli/2.0.70 (external, cli)

v2.0.69

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.xzLVTny6fs` to `/tmp/tmp.mn3WJcPrrR`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.68 (external, cli) -> claude-cli/2.0.69 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.68 (external, cli)	claude-cli/2.0.69 (external, cli)

v2.0.68

Apr 22

notable Apr 22, 2026

No colon before tool calls rule

A new formatting instruction was added requiring that text preceding a tool call use a period instead of a colon, since tool calls may not be visible in output. The working directory path was also updated to a new temp directory, which is a routine environment change with no behavioral significance.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+217 chars
Header / user_agentclaude-cli/2.0.67 (external, cli) -> claude-cli/2.0.68 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,789 chars	13,006 chars (+217)
promptsblock 1	previous text	text changed (+217 chars)
transportheader / user_agent	claude-cli/2.0.67 (external, cli)	claude-cli/2.0.68 (external, cli)

v2.0.67

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.ek9xrcb866` to `/tmp/tmp.W9JGvvxnmF`, reflecting a new ephemeral temp directory for the runner session. This is an automatic environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.66 (external, cli) -> claude-cli/2.0.67 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.66 (external, cli)	claude-cli/2.0.67 (external, cli)

v2.0.66

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.KBVap50gLC` to `/tmp/tmp.ek9xrcb866`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.65 (external, cli) -> claude-cli/2.0.66 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.65 (external, cli)	claude-cli/2.0.66 (external, cli)

v2.0.65

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.fm5xPFZ1Ab` to `/tmp/tmp.KBVap50gLC`, reflecting a new ephemeral temp directory for this version's runtime snapshot. This is a session-specific value with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / TaskOutputnew tool description
Schema added / TaskOutputnew input schema
Tool removed / AgentOutputTooltool removed
Schema removed / AgentOutputToolinput schema removed
Tool removed / BashOutputtool removed
Schema removed / BashOutputinput schema removed
Tool schema / Bashschema changed
Tool schema / Grepschema changed
Tool description / Taskdescription -10 chars
Tool schema / Taskschema changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.64 (external, cli) -> claude-cli/2.0.65 (external, cli)

Split-view diff10 fields changedtools · 5schemas · 3prompts · 1transport · 1

Field	Before	After
toolsTaskOutput	—	added
toolsAgentOutputTool	present	—
toolsBashOutput	present	—
schemasBash	previous schema	updated schema
schemasGrep	previous schema	updated schema
toolsTask / description	previous description	description changed (-10 chars)
schemasTask	previous schema	updated schema
toolstool count	18	17
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.64 (external, cli)	claude-cli/2.0.65 (external, cli)

v2.0.64

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.AHOws1qVgx` to `/tmp/tmp.fm5xPFZ1Ab`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.63 (external, cli) -> claude-cli/2.0.64 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.63 (external, cli)	claude-cli/2.0.64 (external, cli)

v2.0.63

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.lQfWHZUm7Z` to `/tmp/tmp.AHOws1qVgx`, reflecting a new ephemeral temp directory for the runner session. This is an automatic environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.62 (external, cli) -> claude-cli/2.0.63 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.62 (external, cli)	claude-cli/2.0.63 (external, cli)

v2.0.62

Apr 22

notable Apr 22, 2026

Adds task-completion persistence directive

A new IMPORTANT instruction was added explicitly forbidding the assistant from stopping mid-task, claiming a task is too large, or citing context limits as a reason for incomplete work. The directive reinforces that unlimited context via summarization is available and the assistant must continue until the task is done or the user intervenes. The working directory path also changed, reflecting a new ephemeral temp directory for this version's environment.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / BashOutputdescription -1 chars
Tool description / EnterPlanModedescription +822 chars
Tool description / Skilldescription +82 chars
Tool description / Taskdescription +179 chars
Tool description / WebFetchdescription -43 chars
Prompt block / 1+290 chars
Header / user_agentclaude-cli/2.0.61 (external, cli) -> claude-cli/2.0.62 (external, cli)

Split-view diff8 fields changedtools · 5prompts · 2transport · 1

Field	Before	After
toolsBashOutput / description	previous description	description changed (-1 chars)
toolsEnterPlanMode / description	previous description	description changed (+822 chars, +12 lines)
toolsSkill / description	previous description	description changed (+82 chars, +1 lines)
toolsTask / description	previous description	description changed (+179 chars, +2 lines)
toolsWebFetch / description	previous description	description changed (-43 chars)
promptstotal prompt size	12,499 chars	12,789 chars (+290)
promptsblock 1	previous text	text changed (+290 chars)
transportheader / user_agent	claude-cli/2.0.61 (external, cli)	claude-cli/2.0.62 (external, cli)

v2.0.61

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.AMNixITqvn` to `/tmp/tmp.7fGqLmyEmW`, reflecting a new ephemeral temp directory for the runner. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.60 (external, cli) -> claude-cli/2.0.61 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.60 (external, cli)	claude-cli/2.0.61 (external, cli)

v2.0.60

Apr 22

minor Apr 22, 2026

Environment block moved to end

The `<env>` block, model identity, knowledge cutoff, and background info were relocated from before the security policy section to after the example block at the end of the prompt. The working directory path also changed from `/tmp/tmp.U9VKXD0TkD` to `/tmp/tmp.AMNixITqvn`, reflecting a new ephemeral session. No substantive content was added or removed.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / AgentOutputToolnew tool description
Schema added / AgentOutputToolnew input schema
Tool description / Bashdescription +22 chars
Tool schema / ExitPlanModeproperties +launchSwarm, +teammateCount
Tool description / Taskdescription +331 chars
Tool schema / Taskproperties +run_in_background
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.59 (external, cli) -> claude-cli/2.0.60 (external, cli)

Split-view diff8 fields changedtools · 4schemas · 2prompts · 1transport · 1

Field	Before	After
toolsAgentOutputTool	—	added
toolsBash / description	previous description	description changed (+22 chars)
schemasExitPlanMode	previous schema	now has: launchSwarm, teammateCount
toolsTask / description	previous description	description changed (+331 chars, +1 lines)
schemasTask	previous schema	now has: run_in_background
toolstool count	17	18
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.59 (external, cli)	claude-cli/2.0.60 (external, cli)

v2.0.59

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.sjwXBGCTCK` to `/tmp/tmp.U9VKXD0TkD`, reflecting a new ephemeral temp directory for this prompt snapshot. This is a routine session/environment value rotation with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.58 (external, cli) -> claude-cli/2.0.59 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.58 (external, cli)	claude-cli/2.0.59 (external, cli)

v2.0.58

Apr 22

notable Apr 22, 2026

Frontier model updated to Opus 4.5

The referenced "most recent frontier Claude model" was updated from Claude Sonnet 4.5 (claude-sonnet-4-5-20250929) to Claude Opus 4.5 (claude-opus-4-5-20251101). The working directory path also changed, which is an ephemeral environment artifact with no semantic significance.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-4 chars
Header / user_agentclaude-cli/2.0.57 (external, cli) -> claude-cli/2.0.58 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,503 chars	12,499 chars (-4)
promptsblock 1	previous text	text changed (-4 chars)
transportheader / user_agent	claude-cli/2.0.57 (external, cli)	claude-cli/2.0.58 (external, cli)

v2.0.57

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.8912vq3S5V` to `/tmp/tmp.b9zAgoYFml`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an auto-generated path with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.56 (external, cli) -> claude-cli/2.0.57 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.56 (external, cli)	claude-cli/2.0.57 (external, cli)

v2.0.56

Apr 22

minor Apr 22, 2026

Adds unlimited context via summarization note

A new bullet was added stating that the conversation has unlimited context through automatic summarization. The working directory path was also updated, reflecting a new ephemeral runner environment.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +44 chars
Tool description / Taskdescription -258 chars
Tool description / WebSearchdescription +151 chars
Prompt block / 1+74 chars
Header / user_agentclaude-cli/2.0.55 (external, cli) -> claude-cli/2.0.56 (external, cli)

Split-view diff6 fields changedtools · 3prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+44 chars)
toolsTask / description	previous description	description changed (-258 chars)
toolsWebSearch / description	previous description	description changed (+151 chars, +3 lines)
promptstotal prompt size	12,429 chars	12,503 chars (+74)
promptsblock 1	previous text	text changed (+74 chars)
transportheader / user_agent	claude-cli/2.0.55 (external, cli)	claude-cli/2.0.56 (external, cli)

v2.0.55

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.Dw0UmYJQlv` to `/tmp/tmp.9EUhBUbJjl`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated path with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.54 (external, cli) -> claude-cli/2.0.55 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.54 (external, cli)	claude-cli/2.0.55 (external, cli)

v2.0.54

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.rJB5KxUg7D` to `/tmp/tmp.Dw0UmYJQlv`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / ExitPlanModeschema changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.53 (external, cli) -> claude-cli/2.0.54 (external, cli)

Split-view diff3 fields changedschemas · 1prompts · 1transport · 1

Field	Before	After
schemasExitPlanMode	previous schema	updated schema
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.53 (external, cli)	claude-cli/2.0.54 (external, cli)

v2.0.53

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.o9KB1c0d3H` to `/tmp/tmp.rJB5KxUg7D`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment-state change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.52 (external, cli) -> claude-cli/2.0.53 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.52 (external, cli)	claude-cli/2.0.53 (external, cli)

v2.0.52

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.IpCGF2RQVx` to `/tmp/tmp.o9KB1c0d3H`, reflecting a new randomly generated temporary directory. This is a routine environment value refresh with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.51 (external, cli) -> claude-cli/2.0.52 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.51 (external, cli)	claude-cli/2.0.52 (external, cli)

v2.0.51

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.ylDjq0pdAC` to `/tmp/tmp.IpCGF2RQVx`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatically generated path with no semantic impact on behavior.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / EnterPlanModenew tool description
Schema added / EnterPlanModenew input schema
Tool description / ExitPlanModedescription +486 chars
Tool schema / ExitPlanModeproperties -plan / required changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.50 (external, cli) -> claude-cli/2.0.51 (external, cli)

Split-view diff6 fields changedtools · 3schemas · 1prompts · 1transport · 1

Field	Before	After
toolsEnterPlanMode	—	added
toolsExitPlanMode / description	previous description	description changed (+486 chars, +9 lines)
schemasExitPlanMode	had: plan · required list changed	required list changed
toolstool count	16	17
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.50 (external, cli)	claude-cli/2.0.51 (external, cli)

v2.0.50

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was changed from `/tmp/tmp.UZlkbI2Q42` to `/tmp/tmp.ylDjq0pdAC`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatically generated path with no semantic impact on behavior.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / WebSearchdescription +525 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.49 (external, cli) -> claude-cli/2.0.50 (external, cli)
Header / anthropic_beta-1

Split-view diff4 fields changedtransport · 2tools · 1prompts · 1

Field	Before	After
toolsWebSearch / description	previous description	description changed (+525 chars, +12 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.49 (external, cli)	claude-cli/2.0.50 (external, cli)
transportheader / anthropic_beta	—	{"added": [], "removed": ["fine-grained-tool-streaming-2025-05-14"]}

v2.0.49

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.4Q7aeWmnCo` to `/tmp/tmp.UZlkbI2Q42`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an auto-generated path with no semantic significance.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.47 (external, cli) -> claude-cli/2.0.49 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.47 (external, cli)	claude-cli/2.0.49 (external, cli)

v2.0.47

Apr 22

notable Apr 22, 2026

Anti-over-engineering and read-before-edit rules added

Three new workflow directives were added to the task-execution section: a hard rule requiring the assistant to read any file before proposing changes to it, and two detailed anti-over-engineering rules discouraging unsolicited features, abstractions, error handling, and code cleanup. The working directory path was also updated, which is a routine environment stamp change.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+1,188 chars
Header / user_agentclaude-cli/2.0.46 (external, cli) -> claude-cli/2.0.47 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	11,241 chars	12,429 chars (+1,188)
promptsblock 1	previous text	text changed (+1,188 chars)
transportheader / user_agent	claude-cli/2.0.46 (external, cli)	claude-cli/2.0.47 (external, cli)

v2.0.46

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.aMmsPyXYi9` to `/tmp/tmp.0mHHu8ldzC`, reflecting a new ephemeral temp directory for this version's runtime environment. This is a routine session-specific value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.45 (external, cli) -> claude-cli/2.0.46 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.45 (external, cli)	claude-cli/2.0.46 (external, cli)

v2.0.45

Apr 22

notable Apr 22, 2026

Doc lookup switched to subagent tool

The mechanism for answering Claude Code documentation questions was changed from a direct `WebFetch` call against a docs map URL to invoking the `Task` tool with `subagent_type='claude-code-guide'`. The trigger conditions were also expanded to include questions about "how to do something with Claude Code" and questions about the Claude Agent SDK. The working directory path was updated to a new temp directory, which is a routine environment refresh.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / BashOutputdescription -1 chars
Tool description / KillShelldescription -1 chars
Tool description / Taskdescription +654 chars
Prompt block / 1+239 chars
Header / user_agentclaude-cli/2.0.44 (external, cli) -> claude-cli/2.0.45 (external, cli)

Split-view diff6 fields changedtools · 3prompts · 2transport · 1

Field	Before	After
toolsBashOutput / description	previous description	description changed (-1 chars)
toolsKillShell / description	previous description	description changed (-1 chars)
toolsTask / description	previous description	description changed (+654 chars, +1 lines)
promptstotal prompt size	11,002 chars	11,241 chars (+239)
promptsblock 1	previous text	text changed (+239 chars)
transportheader / user_agent	claude-cli/2.0.44 (external, cli)	claude-cli/2.0.45 (external, cli)

v2.0.44

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.XjubiUAo28` to `/tmp/tmp.jqr3y2Baix`, reflecting a new ephemeral temp directory for this version's runtime environment. This is a routine session-specific value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.43 (external, cli) -> claude-cli/2.0.44 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.43 (external, cli)	claude-cli/2.0.44 (external, cli)

v2.0.43

Apr 22

notable Apr 22, 2026

Planning guidance and cleanup rules added

Two new behavioral rules were added: one instructing the assistant to omit time estimates when planning tasks, and another directing it to fully delete unused code rather than leaving backwards-compatibility stubs or comments. The working directory path was also updated, reflecting a new sandbox session.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+490 chars
Header / user_agentclaude-cli/2.0.42 (external, cli) -> claude-cli/2.0.43 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	10,512 chars	11,002 chars (+490)
promptsblock 1	previous text	text changed (+490 chars)
transportheader / user_agent	claude-cli/2.0.42 (external, cli)	claude-cli/2.0.43 (external, cli)

v2.0.42

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.fFcmMOCoFu` to `/tmp/tmp.EJ4IUOhyBy`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.41 (external, cli) -> claude-cli/2.0.42 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.41 (external, cli)	claude-cli/2.0.42 (external, cli)

v2.0.41

Apr 22

minor Apr 22, 2026

Docs URL domain and temp dir updated

The Claude Code docs map URL was changed from `docs.claude.com/en/docs/claude-code/` to `code.claude.com/docs/en/`, reflecting a domain/path reorganization for the documentation site. The working directory path was also bumped to a new temporary directory, which is a routine environment change between runs.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-12 chars
Header / user_agentclaude-cli/2.0.37 (external, cli) -> claude-cli/2.0.41 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	10,524 chars	10,512 chars (-12)
promptsblock 1	previous text	text changed (-12 chars)
transportheader / user_agent	claude-cli/2.0.37 (external, cli)	claude-cli/2.0.41 (external, cli)

v2.0.37

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.PjhWmOPqcZ` to `/tmp/tmp.eImHNENSce`, reflecting a new ephemeral temp directory for the runner. This is an automatically generated path with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.36 (external, cli) -> claude-cli/2.0.37 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.36 (external, cli)	claude-cli/2.0.37 (external, cli)

v2.0.36

Apr 22

trivial Apr 22, 2026

Temp directory path and blank line cleanup

A stray blank bullet line was removed from the "Doing tasks" section, and the ephemeral working directory path was updated to a new temp directory. Neither change affects assistant behavior.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Skilldescription -6 chars
Tool description / SlashCommanddescription -204 chars
Prompt block / 1-3 chars
Header / user_agentclaude-cli/2.0.35 (external, cli) -> claude-cli/2.0.36 (external, cli)

Split-view diff5 fields changedtools · 2prompts · 2transport · 1

Field	Before	After
toolsSkill / description	previous description	description changed (-6 chars)
toolsSlashCommand / description	previous description	description changed (-204 chars, -3 lines)
promptstotal prompt size	10,527 chars	10,524 chars (-3)
promptsblock 1	previous text	text changed (-3 chars)
transportheader / user_agent	claude-cli/2.0.35 (external, cli)	claude-cli/2.0.36 (external, cli)

v2.0.35

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.0jOX3z88yU` to `/tmp/tmp.fqGENiLXEL`, reflecting a new ephemeral temporary directory for the runner session. This is an automatically generated path with no semantic or behavioral impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / Skillproperties +skill / properties -command / required changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.34 (external, cli) -> claude-cli/2.0.35 (external, cli)

Split-view diff3 fields changedschemas · 1prompts · 1transport · 1

Field	Before	After
schemasSkill	had: command · required list changed	now has: skill · required list changed
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.34 (external, cli)	claude-cli/2.0.35 (external, cli)

v2.0.34

Apr 22

trivial Apr 22, 2026

Temp directory bump and blank lines

The working directory path was updated from `/tmp/tmp.THYLTDaS2u` to `/tmp/tmp.0jOX3z88yU`, reflecting a new ephemeral runner environment. A few blank lines were also added around the hooks and task-planning sections, with no semantic change to instructions.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +340 chars
Prompt block / 1+5 chars
Header / user_agentclaude-cli/2.0.33 (external, cli) -> claude-cli/2.0.34 (external, cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+340 chars, +1 lines)
promptstotal prompt size	10,522 chars	10,527 chars (+5)
promptsblock 1	previous text	text changed (+5 chars)
transportheader / user_agent	claude-cli/2.0.33 (external, cli)	claude-cli/2.0.34 (external, cli)

v2.0.33

Apr 22

trivial Apr 22, 2026

Temp directory path and blank line update

The working directory path was updated from `/tmp/tmp.G2bKi8MAmO` to `/tmp/tmp.THYLTDaS2u`, reflecting a new ephemeral environment instance. A redundant blank line before the environment block was also removed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1-1 chars
Header / user_agentclaude-cli/2.0.32 (external, cli) -> claude-cli/2.0.33 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	10,523 chars	10,522 chars (-1)
promptsblock 1	previous text	text changed (-1 chars)
transportheader / user_agent	claude-cli/2.0.32 (external, cli)	claude-cli/2.0.33 (external, cli)

v2.0.32

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.hOfqHgjtxG` to `/tmp/tmp.G2bKi8MAmO`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatically generated value with no semantic or behavioral impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / Grepproperties +offset
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.31 (external, cli) -> claude-cli/2.0.32 (external, cli)

Split-view diff3 fields changedschemas · 1prompts · 1transport · 1

Field	Before	After
schemasGrep	previous schema	now has: offset
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.31 (external, cli)	claude-cli/2.0.32 (external, cli)

v2.0.31

Apr 22

minor Apr 22, 2026

Adds claude_background_info model context

A new `<claude_background_info>` block was injected into the prompt, explicitly identifying Claude Sonnet 4.5 as the most recent frontier model. The working directory value also changed, reflecting a new ephemeral temp path. The background info block likely ensures the assistant can accurately self-report its model version in responses.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+153 chars
Header / user_agentclaude-cli/2.0.30 (external, cli) -> claude-cli/2.0.31 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	10,370 chars	10,523 chars (+153)
promptsblock 1	previous text	text changed (+153 chars)
transportheader / user_agent	claude-cli/2.0.30 (external, cli)	claude-cli/2.0.31 (external, cli)

v2.0.30

Apr 22

notable Apr 22, 2026

Security vulnerability guidance added to workflow

A new instruction was added to the software engineering task workflow explicitly warning against introducing common security vulnerabilities (command injection, XSS, SQL injection, OWASP Top 10) and requiring the assistant to immediately fix any insecure code it writes. The working directory path was also updated, reflecting a new ephemeral session environment.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / ExitPlanModedescription -1 chars
Tool description / Taskdescription -308 chars
Prompt block / 1+206 chars
Header / user_agentclaude-cli/2.0.29 (external, cli) -> claude-cli/2.0.30 (external, cli)

Split-view diff5 fields changedtools · 2prompts · 2transport · 1

Field	Before	After
toolsExitPlanMode / description	previous description	description changed (-1 chars, -1 lines)
toolsTask / description	previous description	description changed (-308 chars)
promptstotal prompt size	10,164 chars	10,370 chars (+206)
promptsblock 1	previous text	text changed (+206 chars)
transportheader / user_agent	claude-cli/2.0.29 (external, cli)	claude-cli/2.0.30 (external, cli)

v2.0.29

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.t3CSbdxDFC` to `/tmp/tmp.DU03ZZOzZb`, reflecting a new ephemeral temporary directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +314 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.28 (external, cli) -> claude-cli/2.0.29 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+314 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.28 (external, cli)	claude-cli/2.0.29 (external, cli)

v2.0.28

Apr 22

notable Apr 22, 2026

Explicit ban on excessive validation phrases

The "Professional objectivity" section was extended with a concrete instruction to avoid over-the-top validation or excessive praise such as "You're absolutely right." The working directory path was also updated to a new temp directory, reflecting a fresh runner environment. The first change strengthens the anti-sycophancy stance with a specific, actionable example.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Taskdescription +211 chars
Tool schema / Taskproperties +model, +resume
Prompt block / 1+135 chars
Header / user_agentclaude-cli/2.0.27 (external, cli) -> claude-cli/2.0.28 (external, cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+211 chars)
schemasTask	previous schema	now has: model, resume
promptstotal prompt size	10,029 chars	10,164 chars (+135)
promptsblock 1	previous text	text changed (+135 chars)
transportheader / user_agent	claude-cli/2.0.27 (external, cli)	claude-cli/2.0.28 (external, cli)

v2.0.27

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.qX9r9hJuUo` to `/tmp/tmp.DeJ3Qql5Vd`, reflecting a new ephemeral temporary directory for the runner session. This is a routine environment value refresh with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.26 (external, cli) -> claude-cli/2.0.27 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.26 (external, cli)	claude-cli/2.0.27 (external, cli)

v2.0.26

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.h6r9gmeO0S` to `/tmp/tmp.qX9r9hJuUo`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated path with no semantic impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / Bashproperties +dangerouslyDisableSandbox / properties -dangerouslyOverrideSandbox
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.25 (external, cli) -> claude-cli/2.0.26 (external, cli)

Split-view diff3 fields changedschemas · 1prompts · 1transport · 1

Field	Before	After
schemasBash	had: dangerouslyOverrideSandbox	now has: dangerouslyDisableSandbox
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.25 (external, cli)	claude-cli/2.0.26 (external, cli)

v2.0.25

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.vhtDaaGOiK` to `/tmp/tmp.h6r9gmeO0S`, reflecting a new temporary session directory. This is an automatically generated path with no semantic impact on behavior.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -76 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.24 (external, cli) -> claude-cli/2.0.25 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-76 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.24 (external, cli)	claude-cli/2.0.25 (external, cli)

v2.0.24

Apr 22

notable Apr 22, 2026

Expanded security policy with dual-use nuance

The security guidance was rewritten from a narrow "defensive only" stance to a more nuanced policy that explicitly permits authorized pentesting, CTF challenges, and educational contexts while still refusing destructive or evasion-focused requests. Dual-use tools such as C2 frameworks and exploit development are now allowed when clear authorization context is provided. The working directory path also changed, reflecting a new environment snapshot.

PromptsSchemasTransport

Change details

Changed artifacts

Tool schema / Bashproperties +dangerouslyOverrideSandbox
Prompt block / 1+166 chars
Header / user_agentclaude-cli/2.0.23 (external, cli) -> claude-cli/2.0.24 (external, cli)

Split-view diff4 fields changedprompts · 2schemas · 1transport · 1

Field	Before	After
schemasBash	previous schema	now has: dangerouslyOverrideSandbox
promptstotal prompt size	9,863 chars	10,029 chars (+166)
promptsblock 1	previous text	text changed (+166 chars)
transportheader / user_agent	claude-cli/2.0.23 (external, cli)	claude-cli/2.0.24 (external, cli)

v2.0.23

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was changed from `/tmp/tmp.T1GBmV6Smc` to `/tmp/tmp.MBDR8arj03`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.22 (external, cli) -> claude-cli/2.0.23 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.22 (external, cli)	claude-cli/2.0.23 (external, cli)

v2.0.22

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.OxwHKDfHW3` to `/tmp/tmp.T1GBmV6Smc`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact on behavior.

ModelPromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Model setting / temperature1 -> null
Header / user_agentclaude-cli/2.0.21 (external, cli) -> claude-cli/2.0.22 (external, cli)

Split-view diff3 fields changedprompts · 1model · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
modeltemperature	1	null
transportheader / user_agent	claude-cli/2.0.21 (external, cli)	claude-cli/2.0.22 (external, cli)

v2.0.21

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.eBGBFcQKrx` to `/tmp/tmp.OxwHKDfHW3`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment refresh with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / ExitPlanModedescription +649 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.20 (external, cli) -> claude-cli/2.0.21 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsExitPlanMode / description	previous description	description changed (+649 chars, +9 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.20 (external, cli)	claude-cli/2.0.21 (external, cli)

v2.0.20

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path changed from `/tmp/tmp.GUJvmTcxbr` to `/tmp/tmp.eBGBFcQKrx`, reflecting a new ephemeral temp directory for the runner environment. This is an auto-generated path with no semantic impact on behavior.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / Skillnew tool description
Schema added / Skillnew input schema
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.19 (external, cli) -> claude-cli/2.0.20 (external, cli)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsSkill	—	added
toolstool count	15	16
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.19 (external, cli)	claude-cli/2.0.20 (external, cli)

v2.0.19

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path changed from `/tmp/tmp.5iBqwPhsmr` to `/tmp/tmp.GUJvmTcxbr`, reflecting a new temporary directory generated for the runner environment. This is a routine session-level change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.18 (external, cli) -> claude-cli/2.0.19 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.18 (external, cli)	claude-cli/2.0.19 (external, cli)

v2.0.18

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.TD0BiH1sUK` to `/tmp/tmp.5iBqwPhsmr`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact on behavior.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +225 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.17 (external, cli) -> claude-cli/2.0.18 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+225 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.17 (external, cli)	claude-cli/2.0.18 (external, cli)

v2.0.17

Apr 22

notable Apr 22, 2026

Mandates Explore subagent for codebase queries

A new "VERY IMPORTANT" directive was added requiring the assistant to use the Task tool with `subagent_type=Explore` instead of direct search commands (Glob, Grep, etc.) when exploring the codebase or answering broad context questions. Two illustrative examples were included to clarify when this rule applies. The working directory path was also updated to a new temp directory, which is a routine environmental change.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Taskdescription +303 chars
Prompt block / 1+594 chars
Header / user_agentclaude-cli/2.0.15 (external, cli) -> claude-cli/2.0.17 (external, cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+303 chars, +1 lines)
promptstotal prompt size	9,269 chars	9,863 chars (+594)
promptsblock 1	previous text	text changed (+594 chars)
transportheader / user_agent	claude-cli/2.0.15 (external, cli)	claude-cli/2.0.17 (external, cli)

v2.0.15

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.jALf1EJ79O` to `/tmp/tmp.M3KF2aFl8F`, reflecting a new temporary directory generated for the session. This is a routine runtime value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / ExitPlanModedescription +9 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.14 (external, cli) -> claude-cli/2.0.15 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsExitPlanMode / description	previous description	description changed (+9 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.14 (external, cli)	claude-cli/2.0.15 (external, cli)

v2.0.14

Apr 22

notable Apr 22, 2026

New file-creation and comms restraint rules

Two new style directives were added: one prohibiting the use of tools (e.g. Bash or code comments) as a substitute for direct user communication, and another strongly discouraging creation of new files in favour of editing existing ones. The working directory path was also updated, which is a routine environment stamp change.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+419 chars
Header / user_agentclaude-cli/2.0.13 (external, cli) -> claude-cli/2.0.14 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	8,850 chars	9,269 chars (+419)
promptsblock 1	previous text	text changed (+419 chars)
transportheader / user_agent	claude-cli/2.0.13 (external, cli)	claude-cli/2.0.14 (external, cli)

v2.0.13

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.PEyzHsqSXi` to `/tmp/tmp.ESS7ttvcAx`. This is a routine change reflecting a new ephemeral temp directory for the runner session and has no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.12 (external, cli) -> claude-cli/2.0.13 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.12 (external, cli)	claude-cli/2.0.13 (external, cli)

v2.0.12

Apr 22

trivial Apr 22, 2026

Trailing whitespace cleanup and temp dir bump

Two trailing spaces were removed from inline prose lines ("inform them of the following:" and "write the following items to the todo list:"). A blank bullet point was accidentally inserted in the "Doing tasks" section, and the ephemeral working-directory path was updated to a new temp directory.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / SlashCommanddescription +182 chars
Prompt block / 1+1 chars
Header / user_agentclaude-cli/2.0.11 (external, cli) -> claude-cli/2.0.12 (external, cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsSlashCommand / description	previous description	description changed (+182 chars)
promptstotal prompt size	8,849 chars	8,850 chars (+1)
promptsblock 1	previous text	text changed (+1 chars)
transportheader / user_agent	claude-cli/2.0.11 (external, cli)	claude-cli/2.0.12 (external, cli)

v2.0.11

Apr 22

major Apr 22, 2026

Tone and style section heavily trimmed

The verbose "Tone and style" section was drastically cut, removing detailed verbosity guidelines, all worked examples, the proactiveness policy, and the preamble/postamble rules. It was replaced with just two concise bullet points covering emoji usage and CLI formatting. The working directory path was also updated to a new temp directory.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-3,637 chars
Header / user_agentclaude-cli/2.0.10 (external, cli) -> claude-cli/2.0.11 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,486 chars	8,849 chars (-3,637)
promptsblock 1	previous text	text changed (-3,637 chars)
transportheader / user_agent	claude-cli/2.0.10 (external, cli)	claude-cli/2.0.11 (external, cli)

v2.0.10

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.MozVwEjbo4` to `/tmp/tmp.wonvXDyV7E`, reflecting a new ephemeral temp directory for the runner session. This is an automatic environment value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / ExitPlanModedescription -2 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.9 (external, cli) -> claude-cli/2.0.10 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsExitPlanMode / description	previous description	description changed (-2 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.9 (external, cli)	claude-cli/2.0.10 (external, cli)

v2.0.9

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.3S5NhUpi1g` to `/tmp/tmp.MozVwEjbo4`, reflecting a new temporary directory generated for this session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.8 (external, cli) -> claude-cli/2.0.9 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.8 (external, cli)	claude-cli/2.0.9 (external, cli)

v2.0.8

Apr 22

notable Apr 22, 2026

Parallel tool-call guidance expanded

The parallel tool-calling instruction was rewritten to more precisely distinguish independent from dependent calls, explicitly prohibit placeholders or guessed parameters, and emphasize maximizing parallelism where safe. The working-directory path was also updated to a new temp directory, reflecting a fresh runner environment.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +363 chars
Tool description / Globdescription -15 chars
Tool description / Readdescription -113 chars
Tool description / SlashCommanddescription +765 chars
Tool description / Taskdescription +307 chars
Prompt block / 1+135 chars
Header / user_agentclaude-cli/2.0.5 (external, cli) -> claude-cli/2.0.8 (external, cli)

Split-view diff8 fields changedtools · 5prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+363 chars, +1 lines)
toolsGlob / description	previous description	description changed (-15 chars)
toolsRead / description	previous description	description changed (-113 chars)
toolsSlashCommand / description	previous description	description changed (+765 chars, +10 lines)
toolsTask / description	previous description	description changed (+307 chars, +1 lines)
promptstotal prompt size	12,351 chars	12,486 chars (+135)
promptsblock 1	previous text	text changed (+135 chars)
transportheader / user_agent	claude-cli/2.0.5 (external, cli)	claude-cli/2.0.8 (external, cli)

v2.0.5

Apr 22

minor Apr 22, 2026

Parallel tool-call guidance made explicit

The parallel tool-calling instruction was reworded to more strongly emphasize batching independent calls into a single message, and now includes a concrete `git status` / `git diff` example. The working-directory path was also updated, reflecting a new ephemeral temp directory with no semantic impact.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription -363 chars
Tool description / Globdescription +15 chars
Tool description / Readdescription +113 chars
Tool description / SlashCommanddescription -765 chars
Prompt block / 1-135 chars
Header / user_agentclaude-cli/2.0.3 (external, cli) -> claude-cli/2.0.5 (external, cli)

Split-view diff7 fields changedtools · 4prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-363 chars, -1 lines)
toolsGlob / description	previous description	description changed (+15 chars)
toolsRead / description	previous description	description changed (+113 chars)
toolsSlashCommand / description	previous description	description changed (-765 chars, -10 lines)
promptstotal prompt size	12,486 chars	12,351 chars (-135)
promptsblock 1	previous text	text changed (-135 chars)
transportheader / user_agent	claude-cli/2.0.3 (external, cli)	claude-cli/2.0.5 (external, cli)

v2.0.3

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.YJq1qn942c` to `/tmp/tmp.4jEBJAOMwA`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated path with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.2 (external, cli) -> claude-cli/2.0.3 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.2 (external, cli)	claude-cli/2.0.3 (external, cli)

v2.0.2

Apr 22

notable Apr 22, 2026

Parallel tool-call guidance expanded

The parallel tool-calling instruction was rewritten to add explicit rules about sequential fallback when calls have dependencies, a prohibition on using placeholders or guessing missing parameters, and clearer language promoting parallel calls for efficiency. The working directory path was also updated to a new temp directory, which is a routine environment refresh with no semantic impact.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +363 chars
Tool description / Globdescription -15 chars
Tool description / Readdescription -113 chars
Tool description / SlashCommanddescription +765 chars
Prompt block / 1+135 chars
Header / user_agentclaude-cli/2.0.1 (external, cli) -> claude-cli/2.0.2 (external, cli)

Split-view diff7 fields changedtools · 4prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+363 chars, +1 lines)
toolsGlob / description	previous description	description changed (-15 chars)
toolsRead / description	previous description	description changed (-113 chars)
toolsSlashCommand / description	previous description	description changed (+765 chars, +10 lines)
promptstotal prompt size	12,351 chars	12,486 chars (+135)
promptsblock 1	previous text	text changed (+135 chars)
transportheader / user_agent	claude-cli/2.0.1 (external, cli)	claude-cli/2.0.2 (external, cli)

v2.0.1

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.39wTIShymi` to `/tmp/tmp.yaqG8hu4Ry`, reflecting a new randomly-generated temporary directory. This is a session- or build-specific value with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/2.0.0 (external, cli) -> claude-cli/2.0.1 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/2.0.0 (external, cli)	claude-cli/2.0.1 (external, cli)

v2.0.0

Apr 22

major Apr 22, 2026

Major workflow and convention guidance removed

The "Following conventions", "Code style", and most of the "Doing tasks" workflow sections were deleted, removing guidance on mimicking code style, checking for library availability, avoiding comments, using search tools, running lint/typecheck, and the explicit prohibition on committing without user consent. A new tool-use directive was added instructing the model to prefer dedicated file tools (Read, Edit, Write) over equivalent Bash commands. The backing model was also bumped from claude-sonnet-4 to claude-sonnet-4-5.

ModelPromptsSchemasToolsTransport

Change details

Changed artifacts

Tool removed / MultiEdittool removed
Schema removed / MultiEditinput schema removed
Tool description / Bashdescription +1,052 chars
Prompt block / 1-1,539 chars
Model setting / modelclaude-sonnet-4-20250514 -> claude-sonnet-4-5-20250929
Header / user_agentclaude-cli/1.0.128 (external, cli) -> claude-cli/2.0.0 (external, cli)

Split-view diff7 fields changedtools · 3prompts · 2model · 1transport · 1

Field	Before	After
toolsMultiEdit	present	—
toolsBash / description	previous description	description changed (+1,052 chars, +10 lines)
toolstool count	16	15
promptstotal prompt size	13,890 chars	12,351 chars (-1,539)
promptsblock 1	previous text	text changed (-1,539 chars)
modelmodel	claude-sonnet-4-20250514	claude-sonnet-4-5-20250929
transportheader / user_agent	claude-cli/1.0.128 (external, cli)	claude-cli/2.0.0 (external, cli)

v1.0.128

Apr 22

notable Apr 22, 2026

Persona rename and softened verbosity rules

The assistant's self-identity was changed from "Claude Code, Anthropic's official CLI" to "a Claude agent, built on Anthropic's Claude Agent SDK," signaling a rebranding or generalization of the persona. Tone-and-style rules were relaxed: the hard 4-line response cap became a soft guideline, and "one word answers are best" was replaced with "brief answers are best, but be sure to provide complete information." After completing file work, the assistant is now instructed to briefly confirm completion rather than simply stopping.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription -766 chars
Tool schema / Bashproperties -dangerouslyOverrideSandbox
Prompt block / 0+5 chars
Prompt block / 1+327 chars
Header / user_agentclaude-cli/1.0.127 (external, cli) -> claude-cli/1.0.128 (external, cli)

Split-view diff6 fields changedprompts · 3tools · 1schemas · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-766 chars, -3 lines)
schemasBash	had: dangerouslyOverrideSandbox	updated schema
promptstotal prompt size	13,558 chars	13,890 chars (+332)
promptsblock 0	previous text	text changed (+5 chars)
promptsblock 1	previous text	text changed (+327 chars)
transportheader / user_agent	claude-cli/1.0.127 (external, cli)	claude-cli/1.0.128 (external, cli)

v1.0.127

Apr 22

trivial Apr 22, 2026

Whitespace tweaks and temp dir bump

Two blank lines were added for section separation (after "Professional objectivity" and before the git-commit warning), and the ephemeral working-directory path was updated to a new temp value. No behavioral or semantic content changed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+2 chars
Header / user_agentclaude-cli/1.0.126 (external, cli) -> claude-cli/1.0.127 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,556 chars	13,558 chars (+2)
promptsblock 1	previous text	text changed (+2 chars)
transportheader / user_agent	claude-cli/1.0.126 (external, cli)	claude-cli/1.0.127 (external, cli)

v1.0.126

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.vrk6tRrqPn` to `/tmp/tmp.ZA32ztOl8Y`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value bump with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.125 (external, cli) -> claude-cli/1.0.126 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.125 (external, cli)	claude-cli/1.0.126 (external, cli)

v1.0.125

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.3nP4P6kXoZ` to `/tmp/tmp.vrk6tRrqPn`, reflecting a new temporary directory for the runner session. This is a routine environment value change with no semantic impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +292 chars
Tool schema / Bashproperties +dangerouslyOverrideSandbox / properties -sandbox
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.124 (external, cli) -> claude-cli/1.0.125 (external, cli)

Split-view diff4 fields changedtools · 1schemas · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+292 chars, +1 lines)
schemasBash	had: sandbox	now has: dangerouslyOverrideSandbox
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.124 (external, cli)	claude-cli/1.0.125 (external, cli)

v1.0.124

Apr 22

trivial Apr 22, 2026

Ephemeral working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.6mTyExBTxg` to `/tmp/tmp.3nP4P6kXoZ`, reflecting a new temporary directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +1,308 chars
Tool schema / Bashproperties +sandbox
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.123 (external, cli) -> claude-cli/1.0.124 (external, cli)

Split-view diff4 fields changedtools · 1schemas · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+1,308 chars, +13 lines)
schemasBash	previous schema	now has: sandbox
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.123 (external, cli)	claude-cli/1.0.124 (external, cli)

v1.0.123

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.BNhHqnxmf1` to `/tmp/tmp.6mTyExBTxg`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.122 (external, cli) -> claude-cli/1.0.123 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.122 (external, cli)	claude-cli/1.0.123 (external, cli)

v1.0.122

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.W0vVqOu35k` to `/tmp/tmp.BNhHqnxmf1`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value refresh with no semantic or behavioral change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / SlashCommandnew tool description
Schema added / SlashCommandnew input schema
Tool description / Bashdescription +1 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.120 (external, cli) -> claude-cli/1.0.122 (external, cli)

Split-view diff5 fields changedtools · 3prompts · 1transport · 1

Field	Before	After
toolsSlashCommand	—	added
toolsBash / description	previous description	description changed (+1 chars, +1 lines)
toolstool count	15	16
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.120 (external, cli)	claude-cli/1.0.122 (external, cli)

v1.0.120

Apr 22

minor Apr 22, 2026

Docs URL domain updated to claude.com

The docs map URL for Claude Code documentation was updated from `docs.anthropic.com` to `docs.claude.com`, reflecting a domain change for Anthropic's documentation site. The working directory path also changed, which is a routine ephemeral environment difference between runs.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-3 chars
Header / user_agentclaude-cli/1.0.119 (external, cli) -> claude-cli/1.0.120 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,559 chars	13,556 chars (-3)
promptsblock 1	previous text	text changed (-3 chars)
transportheader / user_agent	claude-cli/1.0.119 (external, cli)	claude-cli/1.0.120 (external, cli)

v1.0.119

Apr 22

minor Apr 22, 2026

Clarifies system-reminder tag origin

The description of `<system-reminder>` tags was updated to explain that they are automatically injected by the system and do not directly relate to the specific tool results or user messages they appear in, replacing the vaguer phrasing that they are "not part of the user's provided input or the tool result." The working directory path in the environment block was also bumped to a new temp directory, which is a routine runtime artifact.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+72 chars
Header / user_agentclaude-cli/1.0.118 (external, cli) -> claude-cli/1.0.119 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,487 chars	13,559 chars (+72)
promptsblock 1	previous text	text changed (+72 chars)
transportheader / user_agent	claude-cli/1.0.118 (external, cli)	claude-cli/1.0.119 (external, cli)

v1.0.118

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was changed from `/tmp/tmp.eiitZJalXx` to `/tmp/tmp.VsdCiTpWV0`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatic value with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.117 (external, cli) -> claude-cli/1.0.118 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.117 (external, cli)	claude-cli/1.0.118 (external, cli)

v1.0.117

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.QZPKbNllsb` to `/tmp/tmp.eiitZJalXx`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.116 (external, cli) -> claude-cli/1.0.117 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.116 (external, cli)	claude-cli/1.0.117 (external, cli)

v1.0.116

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.61TdzOFpJ5` to `/tmp/tmp.QZPKbNllsb`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value bump with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.115 (external, cli) -> claude-cli/1.0.116 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.115 (external, cli)	claude-cli/1.0.116 (external, cli)

v1.0.115

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.UA7ZluFTup` to `/tmp/tmp.61TdzOFpJ5`, reflecting a new ephemeral temp directory for this build or run. This is an automated environment value with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.114 (external, cli) -> claude-cli/1.0.115 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.114 (external, cli)	claude-cli/1.0.115 (external, cli)

v1.0.114

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.oHP4UMVOYK` to `/tmp/tmp.UA7ZluFTup`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.113 (external, cli) -> claude-cli/1.0.114 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.113 (external, cli)	claude-cli/1.0.114 (external, cli)

v1.0.113

Apr 22

trivial Apr 22, 2026

Temporary working directory path refreshed

The working directory path in the environment block was updated from `/tmp/tmp.f0wUCCoH1g` to `/tmp/tmp.oHP4UMVOYK`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value rotation with no semantic or behavioral change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / KillShellnew tool description
Schema added / KillShellnew input schema
Tool removed / KillBashtool removed
Schema removed / KillBashinput schema removed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.112 (external, cli) -> claude-cli/1.0.113 (external, cli)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsKillShell	—	added
toolsKillBash	present	—
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.112 (external, cli)	claude-cli/1.0.113 (external, cli)

v1.0.112

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.y51l84FADk` to `/tmp/tmp.f0wUCCoH1g`, reflecting a new ephemeral temp directory for the runner. This is a routine session-specific value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.111 (external, cli) -> claude-cli/1.0.112 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.111 (external, cli)	claude-cli/1.0.112 (external, cli)

v1.0.111

Apr 22

notable Apr 22, 2026

Explicit parallel tool-use instruction added

A new bullet was added clarifying that when the user explicitly requests parallel execution, the assistant must send a single message with multiple tool-use content blocks — using the Task tool as a concrete example. The working directory path was also updated, reflecting a new ephemeral temp directory.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Taskdescription +291 chars
Prompt block / 1+258 chars
Header / user_agentclaude-cli/1.0.110 (external, cli) -> claude-cli/1.0.111 (external, cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+291 chars, +1 lines)
promptstotal prompt size	13,229 chars	13,487 chars (+258)
promptsblock 1	previous text	text changed (+258 chars)
transportheader / user_agent	claude-cli/1.0.110 (external, cli)	claude-cli/1.0.111 (external, cli)

v1.0.110

Apr 22

trivial Apr 22, 2026

Temp working directory path rotated

The working directory path in the environment block was updated from `/tmp/tmp.W77Cv04fVb` to `/tmp/tmp.Nd5VxqqaDm`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated path change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.109 (external, cli) -> claude-cli/1.0.110 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.109 (external, cli)	claude-cli/1.0.110 (external, cli)

v1.0.109

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.6lSyS34HnV` to `/tmp/tmp.W77Cv04fVb`, reflecting a new ephemeral temp directory for the runner session. This is an automatic environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.108 (external, cli) -> claude-cli/1.0.109 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.108 (external, cli)	claude-cli/1.0.109 (external, cli)

v1.0.108

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from one temporary directory name to another. This is a routine snapshot artifact reflecting a different ephemeral build or test environment, with no semantic change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -1 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.107 (external, cli) -> claude-cli/1.0.108 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-1 chars, -1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.107 (external, cli)	claude-cli/1.0.108 (external, cli)

v1.0.107

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.ssRpaiKQaB` to `/tmp/tmp.Fmefo4hnCI`, reflecting a new ephemeral temp directory for this build or run. This is an automatically generated path with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.106 (external, cli) -> claude-cli/1.0.107 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.106 (external, cli)	claude-cli/1.0.107 (external, cli)

v1.0.106

Apr 22

notable Apr 22, 2026

Adds professional objectivity persona guidance

A new "Professional objectivity" section was added, instructing the assistant to prioritize technical accuracy and honest disagreement over validating user beliefs, avoiding unnecessary praise or emotional validation. Minor wording tweaks were also made to the verbosity/tone instructions, consolidating redundant phrasing and splitting a long sentence for readability. The working directory path was updated, reflecting a new runtime environment.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+637 chars
Header / user_agentclaude-cli/1.0.105 (external, cli) -> claude-cli/1.0.106 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,592 chars	13,229 chars (+637)
promptsblock 1	previous text	text changed (+637 chars)
transportheader / user_agent	claude-cli/1.0.105 (external, cli)	claude-cli/1.0.106 (external, cli)

v1.0.105

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.ZWCab043jE` to `/tmp/tmp.E08SlSonOH`, reflecting a new temporary directory generated for this version's runtime environment. This is a session-specific value with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.103 (external, cli) -> claude-cli/1.0.105 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.103 (external, cli)	claude-cli/1.0.105 (external, cli)

v1.0.103

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.TezWGV69HK` to `/tmp/tmp.ZWCab043jE`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact on behavior.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -1 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.102 (external, cli) -> claude-cli/1.0.103 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-1 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.102 (external, cli)	claude-cli/1.0.103 (external, cli)

v1.0.102

Apr 22

notable Apr 22, 2026

Switches model from Opus 4.1 to Sonnet 4

The underlying model was changed from claude-opus-4-1-20250805 to claude-sonnet-4-20250514, and the working directory temp path was updated to reflect a new session. The model downgrade from Opus to Sonnet may affect response quality and capability for complex tasks.

ModelPromptsSchemasTransport

Change details

Changed artifacts

Tool schema / Bashschema changed
Prompt block / 1+0 chars
Model setting / modelclaude-opus-4-1-20250805 -> claude-sonnet-4-20250514
Header / user_agentclaude-cli/1.0.100 (external, cli) -> claude-cli/1.0.102 (external, cli)

Split-view diff4 fields changedschemas · 1prompts · 1model · 1transport · 1

Field	Before	After
schemasBash	previous schema	updated schema
promptsblock 1	previous text	text changed (0 chars net)
modelmodel	claude-opus-4-1-20250805	claude-sonnet-4-20250514
transportheader / user_agent	claude-cli/1.0.100 (external, cli)	claude-cli/1.0.102 (external, cli)

v1.0.100

Apr 22

notable Apr 22, 2026

Upgrades model to Opus 4.1

The underlying model was changed from claude-sonnet-4-20250514 to claude-opus-4-1-20250805, and the working directory temp path was updated. The model upgrade from Sonnet 4 to Opus 4.1 represents a shift to a more capable (and typically slower/costlier) model tier.

ModelPromptsTransport

Change details

Changed artifacts

Prompt block / 1+0 chars
Model setting / modelclaude-sonnet-4-20250514 -> claude-opus-4-1-20250805
Header / user_agentclaude-cli/1.0.98 (external, cli) -> claude-cli/1.0.100 (external, cli)

Split-view diff3 fields changedprompts · 1model · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
modelmodel	claude-sonnet-4-20250514	claude-opus-4-1-20250805
transportheader / user_agent	claude-cli/1.0.98 (external, cli)	claude-cli/1.0.100 (external, cli)

v1.0.98

Apr 22

notable Apr 22, 2026

Explicit credential-harvesting refusal added

Both instances of the defensive-security policy statement were updated to explicitly prohibit assistance with credential discovery or harvesting, citing bulk crawling for SSH keys, browser cookies, and cryptocurrency wallets as concrete examples. The working directory temp path also changed, which is a routine environment value bump with no semantic effect.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool removed / LStool removed
Schema removed / LSinput schema removed
Tool description / Bashdescription -13 chars
Tool description / Readdescription +108 chars
Tool description / Taskdescription -6 chars
Prompt block / 1+274 chars
Header / user_agentclaude-cli/1.0.96 (external, cli) -> claude-cli/1.0.98 (external, cli)

Split-view diff8 fields changedtools · 5prompts · 2transport · 1

Field	Before	After
toolsLS	present	—
toolsBash / description	previous description	description changed (-13 chars)
toolsRead / description	previous description	description changed (+108 chars, +1 lines)
toolsTask / description	previous description	description changed (-6 chars, -2 lines)
toolstool count	16	15
promptstotal prompt size	12,318 chars	12,592 chars (+274)
promptsblock 1	previous text	text changed (+274 chars)
transportheader / user_agent	claude-cli/1.0.96 (external, cli)	claude-cli/1.0.98 (external, cli)

v1.0.96

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.24h1vlpX72` to `/tmp/tmp.Qb2LEnKli6`, reflecting a new ephemeral temp directory for the runner. This is a routine environment-snapshot change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.95 (external, cli) -> claude-cli/1.0.96 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.95 (external, cli)	claude-cli/1.0.96 (external, cli)

v1.0.95

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.jYwvS8pSct` to `/tmp/tmp.24h1vlpX72`, reflecting a new temporary directory generated for the runner session. This is a routine environmental value bump with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.94 (external, cli) -> claude-cli/1.0.95 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.94 (external, cli)	claude-cli/1.0.95 (external, cli)

v1.0.94

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.4QSD2nKGAj` to `/tmp/tmp.jYwvS8pSct`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.93 (external, cli) -> claude-cli/1.0.94 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.93 (external, cli)	claude-cli/1.0.94 (external, cli)

v1.0.93

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.L7czyfWbWZ` to `/tmp/tmp.4QSD2nKGAj`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatic change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.92 (external, cli) -> claude-cli/1.0.93 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.92 (external, cli)	claude-cli/1.0.93 (external, cli)

v1.0.92

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.OxjEDtpu3s` to `/tmp/tmp.L7czyfWbWZ`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automated session-specific value with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.91 (external, cli) -> claude-cli/1.0.92 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.91 (external, cli)	claude-cli/1.0.92 (external, cli)

v1.0.91

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.NFYDKBwnU8` to `/tmp/tmp.OxjEDtpu3s`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.90 (external, cli) -> claude-cli/1.0.91 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.90 (external, cli)	claude-cli/1.0.91 (external, cli)

v1.0.90

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.slL9CNIbHC` to `/tmp/tmp.NFYDKBwnU8`, reflecting a new temporary directory generated for the runner session. This is a routine session-level change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.89 (external, cli) -> claude-cli/1.0.90 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.89 (external, cli)	claude-cli/1.0.90 (external, cli)

v1.0.89

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.aYFHLjg5NS` to `/tmp/tmp.slL9CNIbHC`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment variable change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / TodoWritedescription +433 chars
Tool schema / TodoWriteschema changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.88 (external, cli) -> claude-cli/1.0.89 (external, cli)

Split-view diff4 fields changedtools · 1schemas · 1prompts · 1transport · 1

Field	Before	After
toolsTodoWrite / description	previous description	description changed (+433 chars, +7 lines)
schemasTodoWrite	previous schema	updated schema
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.88 (external, cli)	claude-cli/1.0.89 (external, cli)

v1.0.88

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.D4QYdBx9xn` to `/tmp/tmp.aYFHLjg5NS`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.87 (external, cli) -> claude-cli/1.0.88 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.87 (external, cli)	claude-cli/1.0.88 (external, cli)

v1.0.87

Apr 22

notable Apr 22, 2026

Docs lookup switched to map URL

The instruction for answering Claude Code questions was updated to point to a centralized docs map file (`claude_code_docs_map.md`) instead of enumerating a hardcoded list of sub-pages inline. The trigger conditions were also expanded to include questions about how to use a specific feature (e.g. implementing a hook or writing a slash command). The working directory path was incidentally bumped to a new temp value.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-465 chars
Header / user_agentclaude-cli/1.0.86 (external, cli) -> claude-cli/1.0.87 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,783 chars	12,318 chars (-465)
promptsblock 1	previous text	text changed (-465 chars)
transportheader / user_agent	claude-cli/1.0.86 (external, cli)	claude-cli/1.0.87 (external, cli)

v1.0.86

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.HooueRxvsB` to `/tmp/tmp.gAtDogMXKU`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / TodoWritedescription +27 chars
Tool schema / TodoWriteschema changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.85 (external, cli) -> claude-cli/1.0.86 (external, cli)

Split-view diff4 fields changedtools · 1schemas · 1prompts · 1transport · 1

Field	Before	After
toolsTodoWrite / description	previous description	description changed (+27 chars)
schemasTodoWrite	previous schema	updated schema
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.85 (external, cli)	claude-cli/1.0.86 (external, cli)

v1.0.85

Apr 22

trivial Apr 22, 2026

Ephemeral working directory path updated

The working directory path in the environment block was updated from one temporary directory name to another, reflecting a new ephemeral session environment. This is a routine snapshot artifact with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.84 (external, cli) -> claude-cli/1.0.85 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.84 (external, cli)	claude-cli/1.0.85 (external, cli)

v1.0.84

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.bAfEogMqMT` to `/tmp/tmp.pOQUcvYwRW`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated value with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.83 (external, cli) -> claude-cli/1.0.84 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.83 (external, cli)	claude-cli/1.0.84 (external, cli)

v1.0.83

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.WmhMrcuUR6` to `/tmp/tmp.bAfEogMqMT`, reflecting a new ephemeral temp directory for this version's runtime session. This is an automated environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.82 (external, cli) -> claude-cli/1.0.83 (external, cli)
Header / anthropic_beta+1

Split-view diff3 fields changedtransport · 2prompts · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.82 (external, cli)	claude-cli/1.0.83 (external, cli)
transportheader / anthropic_beta	—	{"added": ["interleaved-thinking-2025-05-14"], "removed": []}

v1.0.82

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.B9lHWwgtiE` to `/tmp/tmp.WmhMrcuUR6`, reflecting a new temporary directory for the runner session. This is a routine session-specific value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.81 (external, cli) -> claude-cli/1.0.82 (external, cli)
Header / anthropic_beta-1

Split-view diff3 fields changedtransport · 2prompts · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.81 (external, cli)	claude-cli/1.0.82 (external, cli)
transportheader / anthropic_beta	—	{"added": [], "removed": ["interleaved-thinking-2025-05-14"]}

v1.0.81

Apr 22

trivial Apr 22, 2026

Temp working directory path rotated

The working directory path in the environment block was updated from `/tmp/tmp.ea186pXRUY` to `/tmp/tmp.B9lHWwgtiE`, reflecting a new temporary directory assigned at prompt generation time. This is a routine environment value change with no semantic impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -2 chars
Tool description / Taskdescription +6 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.80 (external, cli) -> claude-cli/1.0.81 (external, cli)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-2 chars, -2 lines)
toolsTask / description	previous description	description changed (+6 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.80 (external, cli)	claude-cli/1.0.81 (external, cli)

v1.0.80

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.kC6GvGb1WL` to `/tmp/tmp.ea186pXRUY`, reflecting a new ephemeral temp directory. This is an automated runtime value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.79 (external, cli) -> claude-cli/1.0.80 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.79 (external, cli)	claude-cli/1.0.80 (external, cli)

v1.0.79

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.bRVJcqIWwV` to `/tmp/tmp.kC6GvGb1WL`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.78 (external, cli) -> claude-cli/1.0.79 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.78 (external, cli)	claude-cli/1.0.79 (external, cli)

v1.0.78

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was changed from `/tmp/tmp.7hbN75Z89b` to `/tmp/tmp.bRVJcqIWwV`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact on behavior.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +2 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.77 (external, cli) -> claude-cli/1.0.78 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+2 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.77 (external, cli)	claude-cli/1.0.78 (external, cli)

v1.0.77

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.9l01diD6in` to `/tmp/tmp.7hbN75Z89b`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.76 (external, cli) -> claude-cli/1.0.77 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.76 (external, cli)	claude-cli/1.0.77 (external, cli)

v1.0.76

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from one temporary directory name to another. This is a routine artifact of snapshot generation and carries no semantic change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.74 (external, cli) -> claude-cli/1.0.76 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.74 (external, cli)	claude-cli/1.0.76 (external, cli)

v1.0.74

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.5gpFzF1JDb` to `/tmp/tmp.7y3zu2WReN`, reflecting a new ephemeral temp directory for this build or run. This is an automatically generated value with no semantic impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +110 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.73 (external, cli) -> claude-cli/1.0.74 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+110 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.73 (external, cli)	claude-cli/1.0.74 (external, cli)

v1.0.73

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.BNWOUXVJhf` to `/tmp/tmp.5gpFzF1JDb`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.72 (external, cli) -> claude-cli/1.0.73 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.72 (external, cli)	claude-cli/1.0.73 (external, cli)

v1.0.72

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.ygrMxnSixj` to `/tmp/tmp.BNWOUXVJhf`, reflecting a new temporary directory generated for the session. This is a routine environment value change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / BashOutputnew tool description
Schema added / BashOutputnew input schema
Tool added / KillBashnew tool description
Schema added / KillBashnew input schema
Tool description / Bashdescription +377 chars
Tool schema / Bashproperties +run_in_background
Tool description / Taskdescription +1 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.71 (external, cli) -> claude-cli/1.0.72 (external, cli)

Split-view diff8 fields changedtools · 5schemas · 1prompts · 1transport · 1

Field	Before	After
toolsBashOutput	—	added
toolsKillBash	—	added
toolsBash / description	previous description	description changed (+377 chars, +1 lines)
schemasBash	previous schema	now has: run_in_background
toolsTask / description	previous description	description changed (+1 chars)
toolstool count	14	16
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.71 (external, cli)	claude-cli/1.0.72 (external, cli)

v1.0.71

Apr 22

trivial Apr 22, 2026

Temporary working directory path refreshed

The working directory path in the environment block was updated from `/tmp/tmp.Izu7XYBcDi` to `/tmp/tmp.ygrMxnSixj`, reflecting a new ephemeral temp directory for this version's run. This is an automated environment value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +111 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.70 (external, cli) -> claude-cli/1.0.71 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+111 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.70 (external, cli)	claude-cli/1.0.71 (external, cli)

v1.0.70

Apr 22

trivial Apr 22, 2026

Temp dir bump and example wording tweak

The working directory path in the environment block was updated to a new temporary directory, reflecting a routine runner refresh. A minor phrasing change in an example updated "use the ls tool to list" to "runs ls to list," making the assistant's action description more concise and natural.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1-8 chars
Header / user_agentclaude-cli/1.0.69 (external, cli) -> claude-cli/1.0.70 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,791 chars	12,783 chars (-8)
promptsblock 1	previous text	text changed (-8 chars)
transportheader / user_agent	claude-cli/1.0.69 (external, cli)	claude-cli/1.0.70 (external, cli)

v1.0.69

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.FnwH2kEF7j` to `/tmp/tmp.pwjhD3tXWV`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path with no semantic impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / TodoWriteschema changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.68 (external, cli) -> claude-cli/1.0.69 (external, cli)

Split-view diff3 fields changedschemas · 1prompts · 1transport · 1

Field	Before	After
schemasTodoWrite	previous schema	updated schema
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.68 (external, cli)	claude-cli/1.0.69 (external, cli)

v1.0.68

Apr 22

trivial Apr 22, 2026

Ephemeral working directory path updated

The temporary working directory path in the environment block was updated from `/tmp/tmp.NiOiE4ArkM` to `/tmp/tmp.FnwH2kEF7j`, reflecting a new ephemeral sandbox session. This is a routine environment snapshot change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool removed / NotebookReadtool removed
Schema removed / NotebookReadinput schema removed
Tool description / Bashdescription -4 chars
Tool description / Readdescription +69 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.67 (external, cli) -> claude-cli/1.0.68 (external, cli)

Split-view diff6 fields changedtools · 4prompts · 1transport · 1

Field	Before	After
toolsNotebookRead	present	—
toolsBash / description	previous description	description changed (-4 chars)
toolsRead / description	previous description	description changed (+69 chars)
toolstool count	15	14
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.67 (external, cli)	claude-cli/1.0.68 (external, cli)

v1.0.67

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.RB89b4BmcG` to `/tmp/tmp.NiOiE4ArkM`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.66 (external, cli) -> claude-cli/1.0.67 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.66 (external, cli)	claude-cli/1.0.67 (external, cli)

v1.0.66

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.VdENJsWewx` to `/tmp/tmp.RB89b4BmcG`, reflecting a new ephemeral temp directory for the runner. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.65 (external, cli) -> claude-cli/1.0.66 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.65 (external, cli)	claude-cli/1.0.66 (external, cli)

v1.0.65

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.X6a40hrlbP` to `/tmp/tmp.VdENJsWewx`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated value with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.64 (external, cli) -> claude-cli/1.0.65 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.64 (external, cli)	claude-cli/1.0.65 (external, cli)

v1.0.64

Apr 22

notable Apr 22, 2026

Slash command instruction removed

The sentence explaining how to handle custom slash commands (using the Task tool with the slash command as the prompt) was removed from the tool usage policy, replaced by a blank line. The working directory path also changed, which is a routine environment value update.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Taskdescription -286 chars
Prompt block / 1-297 chars
Header / user_agentclaude-cli/1.0.63 (external, cli) -> claude-cli/1.0.64 (external, cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (-286 chars, -1 lines)
promptstotal prompt size	13,088 chars	12,791 chars (-297)
promptsblock 1	previous text	text changed (-297 chars)
transportheader / user_agent	claude-cli/1.0.63 (external, cli)	claude-cli/1.0.64 (external, cli)

v1.0.63

Apr 22

notable Apr 22, 2026

Removes 4-line conciseness mandate

The hard rule requiring responses to be fewer than 4 lines (excluding tool use and code generation) was removed entirely. A trailing whitespace on the CLI brevity reminder was also cleaned up, and the working directory temp path was updated to reflect a new runner session.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-134 chars
Header / user_agentclaude-cli/1.0.62 (external, cli) -> claude-cli/1.0.63 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,222 chars	13,088 chars (-134)
promptsblock 1	previous text	text changed (-134 chars)
transportheader / user_agent	claude-cli/1.0.62 (external, cli)	claude-cli/1.0.63 (external, cli)

v1.0.62

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.n8O8uQQu7N` to `/tmp/tmp.8BQCBWWLkA`, reflecting a new ephemeral temp directory for the runner. This is an automatic environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.61 (external, cli) -> claude-cli/1.0.62 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.61 (external, cli)	claude-cli/1.0.62 (external, cli)

v1.0.61

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from one temporary directory to another, reflecting a new sandbox or runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.60 (external, cli) -> claude-cli/1.0.61 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.60 (external, cli)	claude-cli/1.0.61 (external, cli)

v1.0.60

Apr 22

notable Apr 22, 2026

Proactive specialized-agent Task tool guidance

A new policy line instructs the assistant to proactively use the Task tool with specialized agents whenever the task matches an agent's description, encouraging smarter agent delegation beyond just file search. The working directory path was also updated, reflecting a new ephemeral temp directory for the runner environment — a routine session-level change with no semantic impact.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Taskdescription +1,681 chars
Tool schema / Taskproperties +subagent_type / required changed
Prompt block / 1+122 chars
Header / user_agentclaude-cli/1.0.59 (external, cli) -> claude-cli/1.0.60 (external, cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+1,681 chars, +43 lines)
schemasTask	required list changed	now has: subagent_type · required list changed
promptstotal prompt size	13,100 chars	13,222 chars (+122)
promptsblock 1	previous text	text changed (+122 chars)
transportheader / user_agent	claude-cli/1.0.59 (external, cli)	claude-cli/1.0.60 (external, cli)

v1.0.59

Apr 22

minor Apr 22, 2026

Tone section reordered and tightened

The "Tone and style" section was restructured: brevity rules were promoted to the top, several instructions were reordered, and the "no code summary" directive was moved out of the Proactiveness section into Tone. The numbered list in the Proactiveness section was converted to a bullet list. A working-directory path was also updated to reflect a new temp directory.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-3 chars
Header / user_agentclaude-cli/1.0.58 (external, cli) -> claude-cli/1.0.59 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,103 chars	13,100 chars (-3)
promptsblock 1	previous text	text changed (-3 chars)
transportheader / user_agent	claude-cli/1.0.58 (external, cli)	claude-cli/1.0.59 (external, cli)

v1.0.58

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.I32u2uv47i` to `/tmp/tmp.rJM9r0fHe0`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated path with no semantic impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Readdescription +126 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.57 (external, cli) -> claude-cli/1.0.58 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsRead / description	previous description	description changed (+126 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.57 (external, cli)	claude-cli/1.0.58 (external, cli)

v1.0.57

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.cliwVBMEYO` to `/tmp/tmp.I32u2uv47i`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an auto-generated path with no semantic impact on behavior.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / ExitPlanModenew tool description
Schema added / ExitPlanModenew input schema
Tool removed / exit_plan_modetool removed
Schema removed / exit_plan_modeinput schema removed
Tool description / Taskdescription -2 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.56 (external, cli) -> claude-cli/1.0.57 (external, cli)

Split-view diff5 fields changedtools · 3prompts · 1transport · 1

Field	Before	After
toolsExitPlanMode	—	added
toolsexit_plan_mode	present	—
toolsTask / description	previous description	description changed (-2 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.56 (external, cli)	claude-cli/1.0.57 (external, cli)

v1.0.56

Apr 22

notable Apr 22, 2026

Adds explicit knowledge cutoff date

A line was added to the environment block stating that the assistant's knowledge cutoff is January 2025. The working directory temp path also changed, which is a routine runtime artifact. The knowledge cutoff disclosure may affect how the model responds to queries about recent events or information.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+45 chars
Header / user_agentclaude-cli/1.0.55 (external, cli) -> claude-cli/1.0.56 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,058 chars	13,103 chars (+45)
promptsblock 1	previous text	text changed (+45 chars)
transportheader / user_agent	claude-cli/1.0.55 (external, cli)	claude-cli/1.0.56 (external, cli)

v1.0.55

Apr 22

trivial Apr 22, 2026

Temporary working directory path refreshed

The working directory path in the environment block was updated from `/tmp/tmp.JmVkmTpDE1` to `/tmp/tmp.w7wP4HOzAU`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.54 (external, cli) -> claude-cli/1.0.55 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.54 (external, cli)	claude-cli/1.0.55 (external, cli)

v1.0.54

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.9PIHzjvWIW` to `/tmp/tmp.JmVkmTpDE1`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.53 (external, cli) -> claude-cli/1.0.54 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.53 (external, cli)	claude-cli/1.0.54 (external, cli)

v1.0.53

Apr 22

notable Apr 22, 2026

Hooks feedback and slash-command dispatch added

Hook output (including `<user-prompt-submit-hook>`) is now explicitly treated as user-originating feedback, raising its authority in the model's reasoning. A new tool-usage policy line instructs the assistant to execute custom slash commands (Markdown-backed `/`-prefixed prompts) by delegating to the Task tool with the full invocation as the prompt. A temporary working-directory path was also updated, which is a trivial environment stamp change.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+387 chars
Header / user_agentclaude-cli/1.0.52 (external, cli) -> claude-cli/1.0.53 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,671 chars	13,058 chars (+387)
promptsblock 1	previous text	text changed (+387 chars)
transportheader / user_agent	claude-cli/1.0.52 (external, cli)	claude-cli/1.0.53 (external, cli)

v1.0.52

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.hInqFmI4gW` to `/tmp/tmp.n6XvuevBaf`, reflecting a new ephemeral temp directory for the runner. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.51 (external, cli) -> claude-cli/1.0.52 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.51 (external, cli)	claude-cli/1.0.52 (external, cli)

v1.0.51

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.rs5urGVWa0` to `/tmp/tmp.hInqFmI4gW`, reflecting a new temporary directory for the runner session. This is a mechanical environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.50 (external, cli) -> claude-cli/1.0.51 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.50 (external, cli)	claude-cli/1.0.51 (external, cli)

v1.0.50

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.HHCO9T8eTn` to `/tmp/tmp.rs5urGVWa0`, reflecting a new ephemeral temporary directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.49 (external, cli) -> claude-cli/1.0.50 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.49 (external, cli)	claude-cli/1.0.50 (external, cli)

v1.0.49

Apr 22

trivial Apr 22, 2026

Temp directory path and blank line cleanup

The working directory path was updated to a new temporary directory value, reflecting a fresh runtime environment snapshot. A redundant blank line after the TodoWrite instruction was also removed.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1-1 chars
Header / user_agentclaude-cli/1.0.48 (external, cli) -> claude-cli/1.0.49 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,672 chars	12,671 chars (-1)
promptsblock 1	previous text	text changed (-1 chars)
transportheader / user_agent	claude-cli/1.0.48 (external, cli)	claude-cli/1.0.49 (external, cli)

v1.0.48

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.hfWiickH0q` to `/tmp/tmp.2UEDgru2TK`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.47 (external, cli) -> claude-cli/1.0.48 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.47 (external, cli)	claude-cli/1.0.48 (external, cli)

v1.0.47

Apr 22

trivial Apr 22, 2026

Temporary working directory path bump

The working directory path in the environment block was updated from `/tmp/tmp.ueCoq2YDmH` to `/tmp/tmp.hfWiickH0q`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.46 (external, cli) -> claude-cli/1.0.47 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.46 (external, cli)	claude-cli/1.0.47 (external, cli)

v1.0.46

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.AsHuEXpqeA` to `/tmp/tmp.ueCoq2YDmH`, reflecting a new ephemeral temp directory for the runner session. This is an auto-generated path change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.45 (external, cli) -> claude-cli/1.0.46 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.45 (external, cli)	claude-cli/1.0.46 (external, cli)

v1.0.45

Apr 22

trivial Apr 22, 2026

Temp directory path bump

The working directory path changed from `/tmp/tmp.kIfoO0Y4kK` to `/tmp/tmp.AsHuEXpqeA`, reflecting a new temporary session directory. A blank line was also added before the environment block. Neither change has any semantic effect.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Grepdescription +191 chars
Tool schema / Grepproperties +-A, +-B, +-C, +-i, +-n, +glob, +head_limit, +multiline, +output_mode, +type / properties -include
Prompt block / 1+1 chars
Header / user_agentclaude-cli/1.0.44 (external, cli) -> claude-cli/1.0.45 (external, cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsGrep / description	previous description	description changed (+191 chars, +1 lines)
schemasGrep	had: include	now has: -A, -B, -C, -i, -n, glob, head_limit, multiline, output_mode, type
promptstotal prompt size	12,671 chars	12,672 chars (+1)
promptsblock 1	previous text	text changed (+1 chars)
transportheader / user_agent	claude-cli/1.0.44 (external, cli)	claude-cli/1.0.45 (external, cli)

v1.0.44

Apr 22

minor Apr 22, 2026

Remove TodoRead from task management docs

The task management section was updated to reference only the `TodoWrite` tool, dropping the explicit mention of `TodoRead`. The working directory path was also rotated to a new temporary directory, which is a routine environment-state change.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool removed / TodoReadtool removed
Schema removed / TodoReadinput schema removed
Tool description / Taskdescription -10 chars
Prompt block / 1-13 chars
Header / user_agentclaude-cli/1.0.43 (external, cli) -> claude-cli/1.0.44 (external, cli)

Split-view diff6 fields changedtools · 3prompts · 2transport · 1

Field	Before	After
toolsTodoRead	present	—
toolsTask / description	previous description	description changed (-10 chars)
toolstool count	16	15
promptstotal prompt size	12,684 chars	12,671 chars (-13)
promptsblock 1	previous text	text changed (-13 chars)
transportheader / user_agent	claude-cli/1.0.43 (external, cli)	claude-cli/1.0.44 (external, cli)

v1.0.43

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.rMkE2HBTzI` to `/tmp/tmp.FuU4AcIbB0`, reflecting a new ephemeral temp directory for the runner session. This is a routine environmental value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.42 (external, cli) -> claude-cli/1.0.43 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.42 (external, cli)	claude-cli/1.0.43 (external, cli)

v1.0.42

Apr 22

notable Apr 22, 2026

WebFetch redirect-following instruction added

A new tool-use policy rule was added instructing the assistant to automatically follow cross-host redirects returned by WebFetch by issuing a new request to the provided redirect URL. The working directory path was also updated, reflecting a new ephemeral temp directory (no semantic change).

PromptsToolsTransport

Change details

Changed artifacts

Tool description / WebFetchdescription +209 chars
Prompt block / 1+171 chars
Header / user_agentclaude-cli/1.0.41 (external, cli) -> claude-cli/1.0.42 (external, cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsWebFetch / description	previous description	description changed (+209 chars, +1 lines)
promptstotal prompt size	12,513 chars	12,684 chars (+171)
promptsblock 1	previous text	text changed (+171 chars)
transportheader / user_agent	claude-cli/1.0.41 (external, cli)	claude-cli/1.0.42 (external, cli)

v1.0.41

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.OxkRU17ijd` to `/tmp/tmp.Rtv7mCQu0S`, reflecting a new ephemeral temp directory for the runner. This is a routine environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.40 (external, cli) -> claude-cli/1.0.41 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.40 (external, cli)	claude-cli/1.0.41 (external, cli)

v1.0.40

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.Il9YJnUGIj` to `/tmp/tmp.OxkRU17ijd`, reflecting a new temporary directory generated for the runner session. This is a routine environment-state change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / WebSearchdescription +139 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.39 (external, cli) -> claude-cli/1.0.40 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsWebSearch / description	previous description	description changed (+139 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.39 (external, cli)	claude-cli/1.0.40 (external, cli)

v1.0.39

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.0gPTddNsdy` to `/tmp/tmp.Il9YJnUGIj`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.38 (external, cli) -> claude-cli/1.0.39 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.38 (external, cli)	claude-cli/1.0.39 (external, cli)

v1.0.38

Apr 22

notable Apr 22, 2026

Adds hooks configuration guidance

A previously falsy/empty placeholder was replaced with a substantive paragraph explaining that users may configure shell-command hooks tied to tool-call events. The new text instructs the assistant to adapt its actions when blocked by a hook or to ask the user to review their hooks configuration. The working directory path also changed, reflecting a new ephemeral sandbox session.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+267 chars
Header / user_agentclaude-cli/1.0.37 (external, cli) -> claude-cli/1.0.38 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,246 chars	12,513 chars (+267)
promptsblock 1	previous text	text changed (+267 chars)
transportheader / user_agent	claude-cli/1.0.37 (external, cli)	claude-cli/1.0.38 (external, cli)

v1.0.37

Apr 22

trivial Apr 22, 2026

Temporary working directory path refreshed

The working directory path in the environment block was updated from `/tmp/tmp.bY6BvPupAe` to `/tmp/tmp.rq8sWinkxM`, reflecting a new ephemeral temp directory for this snapshot. This is a routine path change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.36 (external, cli) -> claude-cli/1.0.37 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.36 (external, cli)	claude-cli/1.0.37 (external, cli)

v1.0.36

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.uFgNKq1fN7` to `/tmp/tmp.bY6BvPupAe`, reflecting a new ephemeral temp directory for this version's runtime session. This is an automatically generated path with no semantic impact on behavior.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / WebSearchdescription +40 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.35 (external, cli) -> claude-cli/1.0.36 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsWebSearch / description	previous description	description changed (+40 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.35 (external, cli)	claude-cli/1.0.36 (external, cli)

v1.0.35

Apr 22

minor Apr 22, 2026

Working dir bump, example removed

The ephemeral working directory path was updated to a new temp value, reflecting a fresh runner environment. A concurrency-focused example demonstrating parallel tool use (grep, glob, concurrent read) was also removed from the conversation examples section.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +3 chars
Tool schema / TodoReadschema changed
Prompt block / 1-281 chars
Header / user_agentclaude-cli/1.0.34 (external, cli) -> claude-cli/1.0.35 (external, cli)

Split-view diff5 fields changedprompts · 2tools · 1schemas · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+3 chars)
schemasTodoRead	previous schema	updated schema
promptstotal prompt size	12,527 chars	12,246 chars (-281)
promptsblock 1	previous text	text changed (-281 chars)
transportheader / user_agent	claude-cli/1.0.34 (external, cli)	claude-cli/1.0.35 (external, cli)

v1.0.34

Apr 22

trivial Apr 22, 2026

Temp directory path bump

The working directory path in the environment block was updated from `/tmp/tmp.cG40rIAWT0` to `/tmp/tmp.Gdmj2YkNOi`, reflecting a new ephemeral runner session. Two blank lines were also added after the system-reminder note, with no semantic effect.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+2 chars
Header / user_agentclaude-cli/1.0.33 (external, cli) -> claude-cli/1.0.34 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,525 chars	12,527 chars (+2)
promptsblock 1	previous text	text changed (+2 chars)
transportheader / user_agent	claude-cli/1.0.33 (external, cli)	claude-cli/1.0.34 (external, cli)

v1.0.33

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.X4ASq9F9le` to `/tmp/tmp.cG40rIAWT0`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated value with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.32 (external, cli) -> claude-cli/1.0.33 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.32 (external, cli)	claude-cli/1.0.33 (external, cli)

v1.0.32

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.cCTKl8qgp2` to `/tmp/tmp.X4ASq9F9le`, reflecting a new ephemeral temp directory for the runner. This is a routine environment value refresh with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / exit_plan_modedescription +641 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.31 (external, cli) -> claude-cli/1.0.32 (external, cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsexit_plan_mode / description	previous description	description changed (+641 chars, +6 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.31 (external, cli)	claude-cli/1.0.32 (external, cli)

v1.0.31

Apr 22

notable Apr 22, 2026

Security policy rewritten for defensive use

The broad malicious-code refusal policy was replaced with a more nuanced directive that explicitly permits defensive security work (analysis, detection rules, vulnerability explanations, defensive tools, documentation) while still refusing to create or improve offensive/malicious code. The docs sub-page index was substantially expanded to reflect a reorganized documentation site. The working directory path also changed, which is a routine environment bump.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-522 chars
Header / user_agentclaude-cli/1.0.30 (external, cli) -> claude-cli/1.0.31 (external, cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,047 chars	12,525 chars (-522)
promptsblock 1	previous text	text changed (-522 chars)
transportheader / user_agent	claude-cli/1.0.30 (external, cli)	claude-cli/1.0.31 (external, cli)

v1.0.30

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.WGnaRjVKW3` to `/tmp/tmp.lb5GWq2kS5`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automated session-specific value with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.29 (external, cli) -> claude-cli/1.0.30 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.29 (external, cli)	claude-cli/1.0.30 (external, cli)

v1.0.29

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.vXI2kP1Cod` to `/tmp/tmp.WGnaRjVKW3`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.28 (external, cli) -> claude-cli/1.0.29 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.28 (external, cli)	claude-cli/1.0.29 (external, cli)

v1.0.28

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.yLHDUyctni` to `/tmp/tmp.vXI2kP1Cod`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatically generated value with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.27 (external, sdk-cli) -> claude-cli/1.0.28 (external, cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.27 (external, sdk-cli)	claude-cli/1.0.28 (external, cli)

v1.0.27

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.ys7iYW8loM` to `/tmp/tmp.yLHDUyctni`, reflecting a new temporary directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.26 (external, sdk-cli) -> claude-cli/1.0.27 (external, sdk-cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.26 (external, sdk-cli)	claude-cli/1.0.27 (external, sdk-cli)

v1.0.26

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.1jk1T35adb` to `/tmp/tmp.ys7iYW8loM`, reflecting a new ephemeral temp directory for this version's runtime session. This is an automated environment value with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.25 (external, sdk-cli) -> claude-cli/1.0.26 (external, sdk-cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.25 (external, sdk-cli)	claude-cli/1.0.26 (external, sdk-cli)

v1.0.25

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.MPEmUqrohP` to `/tmp/tmp.1jk1T35adb`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated path with no semantic impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Taskdescription +70 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.24 (external, sdk-cli) -> claude-cli/1.0.25 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsTask / description	previous description	description changed (+70 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.24 (external, sdk-cli)	claude-cli/1.0.25 (external, sdk-cli)

v1.0.24

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.ZkNI0QDhT2` to `/tmp/tmp.MPEmUqrohP`, reflecting a new ephemeral temp directory for the runner session. This is an automatic environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.23 (external, sdk-cli) -> claude-cli/1.0.24 (external, sdk-cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.23 (external, sdk-cli)	claude-cli/1.0.24 (external, sdk-cli)

v1.0.23

Apr 22

trivial Apr 22, 2026

Date format and temp dir bump

The working directory path was updated to a new temporary directory, and the date format changed from M/D/YYYY to ISO 8601 (YYYY-MM-DD). These are routine snapshot-level updates with no behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -12 chars
Tool schema / NotebookEditrequired changed
Prompt block / 1+1 chars
Header / user_agentclaude-cli/1.0.22 (external, sdk-cli) -> claude-cli/1.0.23 (external, sdk-cli)
Header / anthropic_beta+1

Split-view diff6 fields changedprompts · 2transport · 2tools · 1schemas · 1

Field	Before	After
toolsBash / description	previous description	description changed (-12 chars)
schemasNotebookEdit	required list changed	required list changed
promptstotal prompt size	13,046 chars	13,047 chars (+1)
promptsblock 1	previous text	text changed (+1 chars)
transportheader / user_agent	claude-cli/1.0.22 (external, sdk-cli)	claude-cli/1.0.23 (external, sdk-cli)
transportheader / anthropic_beta	—	{"added": ["fine-grained-tool-streaming-2025-05-14"], "removed": []}

v1.0.22

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.gnyYlKkyyF` to `/tmp/tmp.DQ9lPSeY7v`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatic environment-level change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -18 chars
Tool schema / NotebookEditproperties +cell_id / properties -cell_number / required changed
Tool schema / NotebookReadproperties +cell_id
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.21 (external, sdk-cli) -> claude-cli/1.0.22 (external, sdk-cli)

Split-view diff5 fields changedschemas · 2tools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-18 chars, +2 lines)
schemasNotebookEdit	had: cell_number · required list changed	now has: cell_id · required list changed
schemasNotebookRead	previous schema	now has: cell_id
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.21 (external, sdk-cli)	claude-cli/1.0.22 (external, sdk-cli)

v1.0.21

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.AaBHFYuGMA` to `/tmp/tmp.gnyYlKkyyF`, reflecting a new randomly-generated temporary directory for the session. This is an auto-generated value with no semantic impact on behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.20 (external, sdk-cli) -> claude-cli/1.0.21 (external, sdk-cli)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.20 (external, sdk-cli)	claude-cli/1.0.21 (external, sdk-cli)

v1.0.20

Apr 22

minor Apr 22, 2026

Stale env vars and spurious "false" injected

The working directory path was rotated to a new temp directory (`/tmp/tmp.AaBHFYuGMA`), and the trailing `directoryStructure` block referencing the old path was removed. A bare `false` string was inserted above the "Doing tasks" section, and a minor blank-line was added after a safety rule — both appear to be artifacts of automated prompt generation rather than intentional edits.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1-213 chars
Header / user_agentclaude-cli/1.0.19 (external, sdk-cli) -> claude-cli/1.0.20 (external, sdk-cli)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	13,259 chars	13,046 chars (-213)
promptsblock 1	previous text	text changed (-213 chars)
transportheader / user_agent	claude-cli/1.0.19 (external, sdk-cli)	claude-cli/1.0.20 (external, sdk-cli)

v1.0.19

Apr 22

trivial Apr 22, 2026

Temp directory path refreshed

The working directory and project file structure snapshot were updated to reflect a new randomly-generated temporary directory path. This is a routine environment-level change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / exit_plan_modenew tool description
Schema added / exit_plan_modenew input schema
Tool description / Bashdescription -1,864 chars
Tool description / Taskdescription +16 chars
Tool description / TodoWritedescription +396 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.18 (external, sdk-cli) -> claude-cli/1.0.19 (external, sdk-cli)

Split-view diff7 fields changedtools · 5prompts · 1transport · 1

Field	Before	After
toolsexit_plan_mode	—	added
toolsBash / description	previous description	description changed (-1,864 chars, -30 lines)
toolsTask / description	previous description	description changed (+16 chars)
toolsTodoWrite / description	previous description	description changed (+396 chars, +9 lines)
toolstool count	15	16
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.18 (external, sdk-cli)	claude-cli/1.0.19 (external, sdk-cli)

v1.0.18

Apr 22

trivial Apr 22, 2026

Temp directory path bumped

The working directory and directory structure snapshot were updated from `/tmp/tmp.sFwKxSvBze` to `/tmp/tmp.ii7hXVyopY`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment refresh with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -139 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.17 (external, sdk-cli) -> claude-cli/1.0.18 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-139 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.17 (external, sdk-cli)	claude-cli/1.0.18 (external, sdk-cli)

v1.0.17

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated from `/tmp/tmp.2QoNPn61rv` to `/tmp/tmp.sFwKxSvBze`, reflecting a new ephemeral session or environment reset. This is a routine runtime value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.16 (external, sdk-cli) -> claude-cli/1.0.17 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.16 (external, sdk-cli)	claude-cli/1.0.17 (external, sdk-cli)

v1.0.16

Apr 22

trivial Apr 22, 2026

Ephemeral working directory path bump

The temporary working directory path was updated from `/tmp/tmp.ZJ5dpP5AWP` to `/tmp/tmp.2QoNPn61rv` in both the environment block and the directory structure snapshot. This is a routine session-specific path change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Taskdescription +68 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.15 (external, sdk-cli) -> claude-cli/1.0.16 (external, sdk-cli)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsTask / description	previous description	description changed (+68 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.15 (external, sdk-cli)	claude-cli/1.0.16 (external, sdk-cli)

v1.0.15

Apr 22

trivial Apr 22, 2026

Temp directory path bump

The working directory and project root path were updated from `/tmp/tmp.IwNlLEF551` to `/tmp/tmp.ZJ5dpP5AWP`, reflecting a new ephemeral sandbox session. This is a routine environment reset with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.14 (external, sdk-cli) -> claude-cli/1.0.15 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.14 (external, sdk-cli)	claude-cli/1.0.15 (external, sdk-cli)

v1.0.14

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated from `/tmp/tmp.cBRTDQKirv` to `/tmp/tmp.IwNlLEF551`, reflecting a new ephemeral session environment. This is a routine instance-level path change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.11 (external, sdk-cli) -> claude-cli/1.0.14 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.11 (external, sdk-cli)	claude-cli/1.0.14 (external, sdk-cli)

v1.0.11

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, changing from `/tmp/tmp.q7kX2Ky3oU` to `/tmp/tmp.cBRTDQKirv`. This is a routine environment-specific value refresh with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.10 (external, sdk-cli) -> claude-cli/1.0.11 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.10 (external, sdk-cli)	claude-cli/1.0.11 (external, sdk-cli)

v1.0.10

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path (`/tmp/tmp.q7kX2Ky3oU` replacing `/tmp/tmp.uBBQtCPzKr`). This is a routine environment identifier change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +1 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.9 (external, sdk-cli) -> claude-cli/1.0.10 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+1 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.9 (external, sdk-cli)	claude-cli/1.0.10 (external, sdk-cli)

v1.0.9

Apr 22

trivial Apr 22, 2026

Temporary working directory path bump

The working directory and directory structure snapshot were updated from `/tmp/tmp.tsryHUFHgd` to `/tmp/tmp.uBBQtCPzKr`, reflecting a new ephemeral session temp folder. This is a purely mechanical environment value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.8 (external, sdk-cli) -> claude-cli/1.0.9 (external, sdk-cli)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.8 (external, sdk-cli)	claude-cli/1.0.9 (external, sdk-cli)

v1.0.8

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new ephemeral temporary path, replacing `/tmp/tmp.GeVfT7X9id` with `/tmp/tmp.tsryHUFHgd`. This is a session-specific environment value with no semantic change to behavior or instructions.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Editdescription +465 chars
Tool schema / Editproperties +replace_all / properties -expected_replacements
Tool description / MultiEditdescription -83 chars
Tool schema / MultiEditschema changed
Tool description / TodoWritedescription -11 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.7 (external, sdk-cli) -> claude-cli/1.0.8 (external, sdk-cli)

Split-view diff8 fields changedtools · 4schemas · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsEdit / description	previous description	description changed (+465 chars, +3 lines)
schemasEdit	had: expected_replacements	now has: replace_all
toolsMultiEdit / description	previous description	description changed (-83 chars, -1 lines)
schemasMultiEdit	previous schema	updated schema
toolsTodoWrite / description	previous description	description changed (-11 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.7 (external, sdk-cli)	claude-cli/1.0.8 (external, sdk-cli)

v1.0.7

Apr 22

notable Apr 22, 2026

Emoji use restricted unless requested

A new directive was added explicitly prohibiting emoji use unless the user asks for them. The working directory and directory structure references were also updated to a new temporary path, which is a routine environment refresh with no semantic impact.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +366 chars
Tool description / Editdescription +97 chars
Tool description / MultiEditdescription +97 chars
Tool description / Writedescription +98 chars
Prompt block / 1+106 chars
Header / user_agentclaude-cli/1.0.6 (external, sdk-cli) -> claude-cli/1.0.7 (external, sdk-cli)

Split-view diff7 fields changedtools · 4prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+366 chars, +6 lines)
toolsEdit / description	previous description	description changed (+97 chars, +1 lines)
toolsMultiEdit / description	previous description	description changed (+97 chars, +1 lines)
toolsWrite / description	previous description	description changed (+98 chars, +1 lines)
promptstotal prompt size	13,153 chars	13,259 chars (+106)
promptsblock 1	previous text	text changed (+106 chars)
transportheader / user_agent	claude-cli/1.0.6 (external, sdk-cli)	claude-cli/1.0.7 (external, sdk-cli)

v1.0.6

Apr 22

trivial Apr 22, 2026

Temp dir rotation and model name trim

The working directory path was rotated to a new temporary directory (`tmp.NLo9AnRxnF`), which is a routine per-session environment value. The model's display name was shortened from "Claude Sonnet 4" to "Sonnet 4", dropping the "Claude" prefix in the self-description string.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1-7 chars
Header / user_agentclaude-cli/1.0.5 (external, sdk-cli) -> claude-cli/1.0.6 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptstotal prompt size	13,160 chars	13,153 chars (-7)
promptsblock 1	previous text	text changed (-7 chars)
transportheader / user_agent	claude-cli/1.0.5 (external, sdk-cli)	claude-cli/1.0.6 (external, sdk-cli)

v1.0.5

Apr 22

trivial Apr 22, 2026

Temp directory path bump

The working directory and directory structure snapshot were updated to a new temporary path, reflecting a fresh environment instantiation. A blank line was also added after the TodoWrite instruction, which has no semantic effect.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1+1 chars
Header / user_agentclaude-cli/1.0.4 (external, sdk-cli) -> claude-cli/1.0.5 (external, sdk-cli)

Split-view diff4 fields changedprompts · 2tools · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptstotal prompt size	13,159 chars	13,160 chars (+1)
promptsblock 1	previous text	text changed (+1 chars)
transportheader / user_agent	claude-cli/1.0.4 (external, sdk-cli)	claude-cli/1.0.5 (external, sdk-cli)

v1.0.4

Apr 22

notable Apr 22, 2026

Model info moved, docs sub-page renamed

The model identifier was removed from the `<env>` block and re-expressed as an explicit prose sentence outside it, making the model name more prominently self-described. The `bedrock-vertex` docs sub-page was renamed to `bedrock-vertex-proxies` and given an expanded annotation covering model configuration flags. Minor whitespace and temp-directory references were also updated.

ModelPromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription -1 chars
Prompt block / 1+137 chars
Model setting / max_tokens20,000 -> 32,000
Header / user_agentclaude-cli/1.0.3 (external, cli) -> claude-cli/1.0.4 (external, sdk-cli)

Split-view diff5 fields changedprompts · 2tools · 1model · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-1 chars, -1 lines)
promptstotal prompt size	13,022 chars	13,159 chars (+137)
promptsblock 1	previous text	text changed (+137 chars)
modelmax_tokens	20,000	32,000
transportheader / user_agent	claude-cli/1.0.3 (external, cli)	claude-cli/1.0.4 (external, sdk-cli)

v1.0.3

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated from `/tmp/tmp.oOOLbaMwXI` to `/tmp/tmp.Q5n5XNITBn`, reflecting a new ephemeral session or runner environment. This is a purely mechanical path change with no semantic impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool schema / Editschema changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.2 (external) -> claude-cli/1.0.3 (external, cli)

Split-view diff4 fields changedtools · 1schemas · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
schemasEdit	previous schema	updated schema
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.2 (external)	claude-cli/1.0.3 (external, cli)

v1.0.2

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path. This is a session-level environment variable change with no semantic or behavioral difference.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.1 (external) -> claude-cli/1.0.2 (external)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.1 (external)	claude-cli/1.0.2 (external)

v1.0.1

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary path (`/tmp/tmp.YKk3N7qLmo` replacing `/tmp/tmp.9A3PkBA7Up`). This is a routine environment-state change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +34 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/1.0.0 (external) -> claude-cli/1.0.1 (external)

Split-view diff3 fields changedtools · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+34 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/1.0.0 (external)	claude-cli/1.0.1 (external)

v1.0.0

Apr 22

notable Apr 22, 2026

Model bump and parallel tool-call guidance rewrite

The default model was updated from claude-3-7-sonnet-20250219 to claude-sonnet-4-20250514. The parallel tool-call instruction was reworded to drop the reference to a "Batch" tool in favor of describing native multi-tool calls in a single message. Working directory and directory snapshot paths also changed to reflect a new ephemeral temp directory.

ModelPromptsSchemasToolsTransport

Change details

Changed artifacts

Tool removed / Batchtool removed
Schema removed / Batchinput schema removed
Tool description / Bashdescription +728 chars
Tool description / Editdescription -2,730 chars
Tool description / MultiEditdescription -15 chars
Tool description / Taskdescription -7 chars
Tool description / Writedescription -10 chars
Prompt block / 1+242 chars
Model setting / modelclaude-3-7-sonnet-20250219 -> claude-sonnet-4-20250514
Header / user_agentclaude-cli/0.2.126 (external) -> claude-cli/1.0.0 (external)
Header / anthropic_beta+1

Split-view diff12 fields changedtools · 7prompts · 2transport · 2model · 1

Field	Before	After
toolsBatch	present	—
toolsBash / description	previous description	description changed (+728 chars)
toolsEdit / description	previous description	description changed (-2,730 chars, -49 lines)
toolsMultiEdit / description	previous description	description changed (-15 chars)
toolsTask / description	previous description	description changed (-7 chars)
toolsWrite / description	previous description	description changed (-10 chars, -6 lines)
toolstool count	16	15
promptstotal prompt size	12,780 chars	13,022 chars (+242)
promptsblock 1	previous text	text changed (+242 chars)
modelmodel	claude-3-7-sonnet-20250219	claude-sonnet-4-20250514
transportheader / user_agent	claude-cli/0.2.126 (external)	claude-cli/1.0.0 (external)
transportheader / anthropic_beta	—	{"added": ["interleaved-thinking-2025-05-14"], "removed": []}

v0.2.126

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory and directory structure snapshot were updated from `/tmp/tmp.O2WbbsIlLd` to `/tmp/tmp.yYPuDUwNRe`, reflecting a new ephemeral temp directory for the runner environment. This is a routine session or build artifact with no semantic change to behavior or instructions.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -36 chars
Tool description / Batchdescription -36 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.125 (external) -> claude-cli/0.2.126 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-36 chars)
toolsBatch / description	previous description	description changed (-36 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.125 (external)	claude-cli/0.2.126 (external)

v0.2.125

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary path (`/tmp/tmp.O2WbbsIlLd` replacing `/tmp/tmp.ghkQFpUXMb`). This is a routine environment refresh with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.124 (external) -> claude-cli/0.2.125 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.124 (external)	claude-cli/0.2.125 (external)

v0.2.124

Apr 22

trivial Apr 22, 2026

Temp directory path refreshed

The working directory and directory structure snapshot were updated to reflect a new temporary directory path (`/tmp/tmp.ghkQFpUXMb` replacing `/tmp/tmp.k0oTSOAWku`). This is a routine environment reset with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.123 (external) -> claude-cli/0.2.124 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.123 (external)	claude-cli/0.2.124 (external)

v0.2.123

Apr 22

trivial Apr 22, 2026

Whitespace fixes and temp dir bump

A missing space in the conciseness rule was corrected ("4 lines of text (not" instead of "text(not"), and two run-together safety sentences were split into properly separated paragraphs. The ephemeral working directory path was updated to a new temp value, which is a routine per-run change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Tool description / Readdescription +0 chars
Prompt block / 1-2 chars
Header / user_agentclaude-cli/0.2.122 (external) -> claude-cli/0.2.123 (external)

Split-view diff6 fields changedtools · 3prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
toolsRead / description	previous description	description changed (+0 chars)
promptstotal prompt size	12,782 chars	12,780 chars (-2)
promptsblock 1	previous text	text changed (-2 chars)
transportheader / user_agent	claude-cli/0.2.122 (external)	claude-cli/0.2.123 (external)

v0.2.122

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary folder path, replacing `/tmp/tmp.Eby6afhTy4` with `/tmp/tmp.6yDF5OVvuU`. This is a routine environment-level change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.120 (external) -> claude-cli/0.2.122 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.120 (external)	claude-cli/0.2.122 (external)

v0.2.120

Apr 22

trivial Apr 22, 2026

Temp directory path refreshed

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.C0O2j5u9za` with `/tmp/tmp.Eby6afhTy4`. This is a routine environment snapshot refresh with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.118 (external) -> claude-cli/0.2.120 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.118 (external)	claude-cli/0.2.120 (external)

v0.2.118

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path (`/tmp/tmp.C0O2j5u9za` replacing `/tmp/tmp.RIP4M8ze9z`). This is a routine environment reset with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +56 chars
Tool description / Batchdescription +56 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.117 (external) -> claude-cli/0.2.118 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+56 chars)
toolsBatch / description	previous description	description changed (+56 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.117 (external)	claude-cli/0.2.118 (external)

v0.2.117

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.ENhSOg5V7J` with `/tmp/tmp.RIP4M8ze9z`. This is a routine environment variable change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.116 (external) -> claude-cli/0.2.117 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.116 (external)	claude-cli/0.2.117 (external)

v0.2.116

Apr 22

minor Apr 22, 2026

Temp dir update and minor formatting drift

The working directory path was bumped to a new temp directory (`ENhSOg5V7J`), and a directory structure snapshot section was appended to the prompt. Several minor whitespace and formatting inconsistencies were introduced (missing space before parenthesis in the conciseness rule, trailing space after `</env>`, added indentation on a safety `IMPORTANT` line, and a removed blank line).

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +418 chars
Tool description / Editdescription -115 chars
Tool description / Globdescription +173 chars
Tool description / MultiEditdescription +0 chars
Tool description / Readdescription +85 chars
Tool description / Taskdescription +169 chars
Tool description / Writedescription +106 chars
Prompt block / 1+224 chars
Header / user_agentclaude-cli/0.2.115 (external) -> claude-cli/0.2.116 (external)

Split-view diff11 fields changedtools · 8prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+418 chars, +3 lines)
toolsEdit / description	previous description	description changed (-115 chars, -1 lines)
toolsGlob / description	previous description	description changed (+173 chars)
toolsMultiEdit / description	previous description	description changed (+0 chars)
toolsRead / description	previous description	description changed (+85 chars)
toolsTask / description	previous description	description changed (+169 chars, +1 lines)
toolsWrite / description	previous description	description changed (+106 chars, +3 lines)
promptstotal prompt size	12,558 chars	12,782 chars (+224)
promptsblock 1	previous text	text changed (+224 chars)
transportheader / user_agent	claude-cli/0.2.115 (external)	claude-cli/0.2.116 (external)

v0.2.115

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block changed from `/tmp/tmp.rMpJGAtd2t` to `/tmp/tmp.VzKGH97owI`, reflecting a new ephemeral temp directory for the runner session. This is an automatically generated value with no semantic impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +126 chars
Tool description / Readdescription +126 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.114 (external) -> claude-cli/0.2.115 (external)

Split-view diff5 fields changedtools · 3prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+126 chars, +1 lines)
toolsRead / description	previous description	description changed (+126 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.114 (external)	claude-cli/0.2.115 (external)

v0.2.114

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.hTSq1Gj0hK` to `/tmp/tmp.rMpJGAtd2t`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatically generated path with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +600 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.113 (external) -> claude-cli/0.2.114 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+600 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.113 (external)	claude-cli/0.2.114 (external)

v0.2.113

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.s9yYxBiqJa` to `/tmp/tmp.hTSq1Gj0hK`, reflecting a new ephemeral temp directory for the runner. This is an auto-generated path change with no semantic impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.109 (external) -> claude-cli/0.2.113 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.109 (external)	claude-cli/0.2.113 (external)

v0.2.109

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.BO4tDj9twN` to `/tmp/tmp.s9yYxBiqJa`, reflecting a new ephemeral temp directory for the runner session. This is a routine environment value refresh with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +0 chars
Tool description / Batchdescription +0 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.108 (external) -> claude-cli/0.2.109 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+0 chars)
toolsBatch / description	previous description	description changed (+0 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.108 (external)	claude-cli/0.2.109 (external)

v0.2.108

Apr 22

notable Apr 22, 2026

Docs URL restructured, example formatting cleaned

The Claude Code documentation URL scheme was updated from two separate overview/tutorials links to a single base URL with enumerated sub-pages (e.g., `cli-usage`, `memory`, `settings`, `security`), giving the assistant a clearer map for fetching relevant docs. Several dialogue examples had spurious blank `assistant:` turn markers removed and a typo ("itme") was fixed. The working directory temp path was also bumped, which is a routine environment snapshot change.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +267 chars
Tool description / Batchdescription +1,116 chars
Tool description / Editdescription +76 chars
Tool description / Grepdescription +150 chars
Tool description / MultiEditdescription +404 chars
Tool description / Taskdescription +0 chars
Tool description / Writedescription +91 chars
Prompt block / 1-76 chars
Header / user_agentclaude-cli/0.2.107 (external) -> claude-cli/0.2.108 (external)

Split-view diff10 fields changedtools · 7prompts · 2transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+267 chars, +1 lines)
toolsBatch / description	previous description	description changed (+1,116 chars, +10 lines)
toolsEdit / description	previous description	description changed (+76 chars, +1 lines)
toolsGrep / description	previous description	description changed (+150 chars, +1 lines)
toolsMultiEdit / description	previous description	description changed (+404 chars, +5 lines)
toolsTask / description	previous description	description changed (+0 chars)
toolsWrite / description	previous description	description changed (+91 chars, +2 lines)
promptstotal prompt size	12,634 chars	12,558 chars (-76)
promptsblock 1	previous text	text changed (-76 chars)
transportheader / user_agent	claude-cli/0.2.107 (external)	claude-cli/0.2.108 (external)

v0.2.107

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.KkyKrfCutU` to `/tmp/tmp.3boc9u2Qxl`, reflecting a new ephemeral temp directory for this version's runtime environment. This is an automatically generated path with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.106 (external) -> claude-cli/0.2.107 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.106 (external)	claude-cli/0.2.107 (external)

v0.2.106

Apr 22

notable Apr 22, 2026

Adds system-reminder tag awareness

A new instruction was added telling the assistant that `<system-reminder>` tags appearing in tool results or user messages are informational reminders injected by the system, not part of the user's actual input. The working directory path was also bumped to a new temp directory, which is a routine environment refresh with no semantic significance.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+202 chars
Header / user_agentclaude-cli/0.2.105 (external) -> claude-cli/0.2.106 (external)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	12,432 chars	12,634 chars (+202)
promptsblock 1	previous text	text changed (+202 chars)
transportheader / user_agent	claude-cli/0.2.105 (external)	claude-cli/0.2.106 (external)

v0.2.105

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.gT47LuG0lD` to `/tmp/tmp.6OZesgWHkD`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.104 (external) -> claude-cli/0.2.105 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.104 (external)	claude-cli/0.2.105 (external)

v0.2.104

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.Gdw9nqlujO` to `/tmp/tmp.gT47LuG0lD`, reflecting a new ephemeral temp directory for the runner session. This is an automated environment value change with no semantic impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool added / WebSearchnew tool description
Schema added / WebSearchnew input schema
Tool description / Batchdescription +740 chars
Tool description / Taskdescription +11 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.103 (external) -> claude-cli/0.2.104 (external)

Split-view diff6 fields changedtools · 4prompts · 1transport · 1

Field	Before	After
toolsWebSearch	—	added
toolsBatch / description	previous description	description changed (+740 chars, +13 lines)
toolsTask / description	previous description	description changed (+11 chars)
toolstool count	15	16
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.103 (external)	claude-cli/0.2.104 (external)

v0.2.103

Apr 22

trivial Apr 22, 2026

Temp working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.Iin5L2oLyp` to `/tmp/tmp.Gdw9nqlujO`, reflecting a new ephemeral temporary directory for the runner session. This is a routine environment value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Batchdescription +1,050 chars
Tool description / TodoWritedescription +1,050 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.102 (external) -> claude-cli/0.2.103 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBatch / description	previous description	description changed (+1,050 chars, +19 lines)
toolsTodoWrite / description	previous description	description changed (+1,050 chars, +19 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.102 (external)	claude-cli/0.2.103 (external)

v0.2.102

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory path in the environment block was updated from `/tmp/tmp.KY7GVoYeFk` to `/tmp/tmp.Iin5L2oLyp`, reflecting a new ephemeral temp directory for the runner. This is an auto-generated path change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.101 (external) -> claude-cli/0.2.102 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.101 (external)	claude-cli/0.2.102 (external)

v0.2.101

Apr 22

notable Apr 22, 2026

Remove synthetic-message guidance and stale context

The "Synthetic messages" section explaining how to handle user-cancellation markers was removed entirely, along with the injected directory-structure context block and its associated working-directory snapshot. The Batch tool-use instruction was also narrowed to apply only to "bash tool calls" and trimmed of its second example. The working directory path was updated to a new temp value, consistent with a fresh session environment.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / MultiEditnew tool description
Schema added / MultiEditnew input schema
Tool description / Batchdescription +2,267 chars
Tool schema / Batchschema changed
Tool description / Taskdescription +11 chars
Prompt block / 1-869 chars
Header / user_agentclaude-cli/0.2.100 (external) -> claude-cli/0.2.101 (external)

Split-view diff8 fields changedtools · 4prompts · 2schemas · 1transport · 1

Field	Before	After
toolsMultiEdit	—	added
toolsBatch / description	previous description	description changed (+2,267 chars, +39 lines)
schemasBatch	previous schema	updated schema
toolsTask / description	previous description	description changed (+11 chars)
toolstool count	14	15
promptstotal prompt size	13,301 chars	12,432 chars (-869)
promptsblock 1	previous text	text changed (-869 chars)
transportheader / user_agent	claude-cli/0.2.100 (external)	claude-cli/0.2.101 (external)

v0.2.100

Apr 22

trivial Apr 22, 2026

Temp directory path refreshed

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.cN2qQQBEN3` with `/tmp/tmp.q9sJz2kXcf`. This is a routine environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.99 (external) -> claude-cli/0.2.100 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.99 (external)	claude-cli/0.2.100 (external)

v0.2.99

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, changing from `/tmp/tmp.nlCuXOLDiO` to `/tmp/tmp.cN2qQQBEN3`. This is a routine environment refresh with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.98 (external) -> claude-cli/0.2.99 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.98 (external)	claude-cli/0.2.99 (external)

v0.2.98

Apr 22

trivial Apr 22, 2026

Temporary working directory path bump

The working directory and directory structure context were updated to reflect a new ephemeral temp path (`/tmp/tmp.nlCuXOLDiO`), replacing the previous one (`/tmp/tmp.SzhWzLI46v`). This is a routine environment refresh with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.97 (external) -> claude-cli/0.2.98 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.97 (external)	claude-cli/0.2.98 (external)

v0.2.97

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated from `/tmp/tmp.qTYy41bSAw` to `/tmp/tmp.SzhWzLI46v`, reflecting a new ephemeral session environment. This is a routine temp-path rotation with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.96 (external) -> claude-cli/0.2.97 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.96 (external)	claude-cli/0.2.97 (external)

v0.2.96

Apr 22

notable Apr 22, 2026

Adds file path and line number citation format

A new "Code References" section was added instructing the assistant to cite source locations using a `file_path:line_number` pattern when referencing specific functions or code. An example exchange is included to illustrate the expected format. The working directory paths also changed, reflecting a new sandbox session.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Batchdescription -202 chars
Tool description / WebFetchdescription -202 chars
Prompt block / 1+360 chars
Header / user_agentclaude-cli/0.2.94 (external) -> claude-cli/0.2.96 (external)

Split-view diff5 fields changedtools · 2prompts · 2transport · 1

Field	Before	After
toolsBatch / description	previous description	description changed (-202 chars, -1 lines)
toolsWebFetch / description	previous description	description changed (-202 chars, -1 lines)
promptstotal prompt size	12,941 chars	13,301 chars (+360)
promptsblock 1	previous text	text changed (+360 chars)
transportheader / user_agent	claude-cli/0.2.94 (external)	claude-cli/0.2.96 (external)

v0.2.94

Apr 22

trivial Apr 22, 2026

Temporary working directory path bumped

The working directory and directory structure snapshot were updated from `/tmp/tmp.OWhOhu0OOD` to `/tmp/tmp.ReLzEksbSN`, reflecting a new ephemeral session path. This is a mechanical environment reset with no semantic change to behavior or instructions.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.93 (external) -> claude-cli/0.2.94 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.93 (external)	claude-cli/0.2.94 (external)

v0.2.93

Apr 22

major Apr 22, 2026

Adds TodoWrite/TodoRead task management

A new "Task Management" section was introduced, instructing the assistant to use TodoWrite and TodoRead tools frequently for planning and tracking tasks, including marking todos as in-progress and completed incrementally. The "Doing tasks" workflow was updated to explicitly include TodoWrite as a planning step, and a new IMPORTANT directive mandates always using TodoWrite throughout the conversation. Two worked examples were added to illustrate the expected todo-driven workflow.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / TodoReadnew tool description
Schema added / TodoReadnew input schema
Tool added / TodoWritenew tool description
Schema added / TodoWritenew input schema
Tool description / Batchdescription +8,916 chars
Tool description / Taskdescription +21 chars
Prompt block / 1+2,536 chars
Header / user_agentclaude-cli/0.2.92 (external) -> claude-cli/0.2.93 (external)

Split-view diff8 fields changedtools · 5prompts · 2transport · 1

Field	Before	After
toolsTodoRead	—	added
toolsTodoWrite	—	added
toolsBatch / description	previous description	description changed (+8,916 chars, +166 lines)
toolsTask / description	previous description	description changed (+21 chars)
toolstool count	12	14
promptstotal prompt size	10,405 chars	12,941 chars (+2,536)
promptsblock 1	previous text	text changed (+2,536 chars)
transportheader / user_agent	claude-cli/0.2.92 (external)	claude-cli/0.2.93 (external)

v0.2.92

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.CbirB5mp4b` with `/tmp/tmp.dJ1wGBM3jV`. This is a routine environment-specific value change with no semantic impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.91 (external) -> claude-cli/0.2.92 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.91 (external)	claude-cli/0.2.92 (external)

v0.2.91

Apr 22

trivial Apr 22, 2026

Temp directory path refreshed

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, changing from `/tmp/tmp.FE4u2CGHVK` to `/tmp/tmp.CbirB5mp4b`. This is a routine environment refresh with no semantic or behavioral change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Batchdescription +1,951 chars
Tool schema / NotebookEditschema changed
Tool schema / Taskproperties +description / required changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.84 (external) -> claude-cli/0.2.91 (external)

Split-view diff5 fields changedschemas · 2tools · 1prompts · 1transport · 1

Field	Before	After
toolsBatch / description	previous description	description changed (+1,951 chars, +17 lines)
schemasNotebookEdit	previous schema	updated schema
schemasTask	required list changed	now has: description · required list changed
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.84 (external)	claude-cli/0.2.91 (external)

v0.2.84

Apr 22

minor Apr 22, 2026

Tool names renamed to shorter forms

Three tool references were renamed: `WebFetchTool` → `WebFetch`, `AgentTool` → `Task`, and `BatchTool` → `Batch`. The working directory and directory structure snapshot paths also changed, reflecting a new temp session. A minor formatting regression introduced a missing newline between two bullet points in the tool usage policy section.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / Batchnew tool description
Schema added / Batchnew input schema
Tool added / Globnew tool description
Schema added / Globnew input schema
Tool added / Grepnew tool description
Schema added / Grepnew input schema
Tool added / LSnew tool description
Schema added / LSnew input schema
Tool added / NotebookEditnew tool description
Schema added / NotebookEditnew input schema
Tool added / NotebookReadnew tool description
Schema added / NotebookReadnew input schema
Tool added / Readnew tool description
Schema added / Readnew input schema
Tool added / Tasknew tool description
Schema added / Tasknew input schema
Tool added / WebFetchnew tool description
Schema added / WebFetchnew input schema
Tool added / Writenew tool description
Schema added / Writenew input schema
Tool removed / AgentTooltool removed
Schema removed / AgentToolinput schema removed
Tool removed / BatchTooltool removed
Schema removed / BatchToolinput schema removed
Tool removed / GlobTooltool removed
Schema removed / GlobToolinput schema removed
Tool removed / GrepTooltool removed
Schema removed / GrepToolinput schema removed
Tool removed / LSTooltool removed
Schema removed / LSToolinput schema removed
Tool removed / NotebookEditTooltool removed
Schema removed / NotebookEditToolinput schema removed
Tool removed / NotebookReadTooltool removed
Schema removed / NotebookReadToolinput schema removed
Tool removed / Replacetool removed
Schema removed / Replaceinput schema removed
Tool removed / Viewtool removed
Schema removed / Viewinput schema removed
Tool removed / WebFetchTooltool removed
Schema removed / WebFetchToolinput schema removed
Tool description / Bashdescription -33 chars
Tool description / Editdescription -4 chars
Prompt block / 1-22 chars
Header / user_agentclaude-cli/0.2.81 (external) -> claude-cli/0.2.84 (external)

Split-view diff25 fields changedtools · 22prompts · 2transport · 1

Field	Before	After
toolsBatch	—	added
toolsGlob	—	added
toolsGrep	—	added
toolsLS	—	added
toolsNotebookEdit	—	added
toolsNotebookRead	—	added
toolsRead	—	added
toolsTask	—	added
toolsWebFetch	—	added
toolsWrite	—	added
toolsAgentTool	present	—
toolsBatchTool	present	—
toolsGlobTool	present	—
toolsGrepTool	present	—
toolsLSTool	present	—
toolsNotebookEditTool	present	—
toolsNotebookReadTool	present	—
toolsReplace	present	—
toolsView	present	—
toolsWebFetchTool	present	—
toolsBash / description	previous description	description changed (-33 chars)
toolsEdit / description	previous description	description changed (-4 chars)
promptstotal prompt size	10,427 chars	10,405 chars (-22)
promptsblock 1	previous text	text changed (-22 chars)
transportheader / user_agent	claude-cli/0.2.81 (external)	claude-cli/0.2.84 (external)

v0.2.81

Apr 22

trivial Apr 22, 2026

Temporary working directory path bump

The working directory and directory structure snapshot were updated from `/tmp/tmp.YdnnKY1JtC` to `/tmp/tmp.7SnDKmzOIM`, reflecting a new ephemeral session environment. This is a routine path change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.80 (external) -> claude-cli/0.2.81 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.80 (external)	claude-cli/0.2.81 (external)

v0.2.80

Apr 22

minor Apr 22, 2026

Rename dispatch_agent to AgentTool

The tool-usage policy reference was updated from `dispatch_agent` to `AgentTool`, reflecting a rename of the file-search agent tool. The working directory and directory structure paths also changed, which are ephemeral environment values with no semantic impact.

PromptsSchemasToolsTransport

Change details

Changed artifacts

Tool added / AgentToolnew tool description
Schema added / AgentToolnew input schema
Tool added / LSToolnew tool description
Schema added / LSToolnew input schema
Tool added / NotebookEditToolnew tool description
Schema added / NotebookEditToolnew input schema
Tool added / NotebookReadToolnew tool description
Schema added / NotebookReadToolnew input schema
Tool removed / LStool removed
Schema removed / LSinput schema removed
Tool removed / NotebookEditCelltool removed
Schema removed / NotebookEditCellinput schema removed
Tool removed / ReadNotebooktool removed
Schema removed / ReadNotebookinput schema removed
Tool removed / dispatch_agenttool removed
Schema removed / dispatch_agentinput schema removed
Tool description / Bashdescription -1 chars
Tool description / BatchTooldescription +11 chars
Tool description / Editdescription +0 chars
Tool description / Viewdescription +4 chars
Prompt block / 1-5 chars
Header / user_agentclaude-cli/0.2.79 (external) -> claude-cli/0.2.80 (external)

Split-view diff15 fields changedtools · 12prompts · 2transport · 1

Field	Before	After
toolsAgentTool	—	added
toolsLSTool	—	added
toolsNotebookEditTool	—	added
toolsNotebookReadTool	—	added
toolsLS	present	—
toolsNotebookEditCell	present	—
toolsReadNotebook	present	—
toolsdispatch_agent	present	—
toolsBash / description	previous description	description changed (-1 chars)
toolsBatchTool / description	previous description	description changed (+11 chars)
toolsEdit / description	previous description	description changed (+0 chars)
toolsView / description	previous description	description changed (+4 chars)
promptstotal prompt size	10,432 chars	10,427 chars (-5)
promptsblock 1	previous text	text changed (-5 chars)
transportheader / user_agent	claude-cli/0.2.79 (external)	claude-cli/0.2.80 (external)

v0.2.79

Apr 22

trivial Apr 22, 2026

Temp directory path refreshed

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.7bvGGWhpf1` with `/tmp/tmp.qajzokFzmt`. This is a routine environment refresh with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +10 chars
Tool description / BatchTooldescription +10 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.78 (external) -> claude-cli/0.2.79 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+10 chars)
toolsBatchTool / description	previous description	description changed (+10 chars)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.78 (external)	claude-cli/0.2.79 (external)

v0.2.78

Apr 22

trivial Apr 22, 2026

Temp directory path bump

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.HqkzxH5cpS` with `/tmp/tmp.7bvGGWhpf1`. This is a routine environment-state refresh with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.77 (external) -> claude-cli/0.2.78 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.77 (external)	claude-cli/0.2.78 (external)

v0.2.77

Apr 22

minor Apr 22, 2026

Numbered steps changed to bullet list

The "Doing tasks" workflow steps were reformatted from a numbered list to an unordered bullet list, removing the explicit ordering of steps. A temp directory path was also rotated to a new value, and a blank line was added after the safety IMPORTANT block — both routine environmental noise.

PromptsToolsTransport

Change details

Changed artifacts

Tool description / Bashdescription +61 chars
Tool description / BatchTooldescription +61 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.76 (external) -> claude-cli/0.2.77 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+61 chars, +1 lines)
toolsBatchTool / description	previous description	description changed (+61 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.76 (external)	claude-cli/0.2.77 (external)

v0.2.76

Apr 22

minor Apr 22, 2026

OS version added to env block

The environment block gained a new `OS Version` field exposing the Linux kernel and platform string. The working directory and directory structure snapshot also reflect a new temporary path, consistent with a fresh runner session.

PromptsTransport

Change details

Changed artifacts

Prompt block / 1+35 chars
Header / user_agentclaude-cli/0.2.74 (external) -> claude-cli/0.2.76 (external)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	10,397 chars	10,432 chars (+35)
promptsblock 1	previous text	text changed (+35 chars)
transportheader / user_agent	claude-cli/0.2.74 (external)	claude-cli/0.2.76 (external)

v0.2.74

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.1H1DRT4FiP` with `/tmp/tmp.HSut1AvTEp`. This is a routine session-level environment value change with no semantic or behavioral impact.

PromptsSchemasTransportLow signal

Change details

Changed artifacts

Tool schema / BatchToolschema changed
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.73 (external) -> claude-cli/0.2.74 (external)

Split-view diff3 fields changedschemas · 1prompts · 1transport · 1

Field	Before	After
schemasBatchTool	previous schema	updated schema
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.73 (external)	claude-cli/0.2.74 (external)

v0.2.73

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary path (`/tmp/tmp.1H1DRT4FiP` replacing `/tmp/tmp.7xLyAMgm41`). This is a routine environment identifier change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -70 chars
Tool description / BatchTooldescription -70 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.72 (external) -> claude-cli/0.2.73 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-70 chars, -1 lines)
toolsBatchTool / description	previous description	description changed (-70 chars, -1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.72 (external)	claude-cli/0.2.73 (external)

v0.2.72

Apr 22

trivial Apr 22, 2026

Ephemeral working directory path updated

The temporary working directory path was updated from `/tmp/tmp.KzQajyHNGQ` to `/tmp/tmp.7xLyAMgm41` in both the environment block and the directory structure snapshot. This is a routine change reflecting a new sandbox session and carries no semantic difference.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / BatchTooldescription -1,785 chars
Tool description / Viewdescription +283 chars
Tool description / dispatch_agentdescription -136 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.70 (external) -> claude-cli/0.2.72 (external)

Split-view diff5 fields changedtools · 3prompts · 1transport · 1

Field	Before	After
toolsBatchTool / description	previous description	description changed (-1,785 chars, -17 lines)
toolsView / description	previous description	description changed (+283 chars, +1 lines)
toolsdispatch_agent / description	previous description	description changed (-136 chars, -1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.70 (external)	claude-cli/0.2.72 (external)

v0.2.70

Apr 22

trivial Apr 22, 2026

Ephemeral working directory path updated

The temporary working directory path was updated from `/tmp/tmp.LzIPRMMt27` to `/tmp/tmp.KzQajyHNGQ` in both the environment block and the directory structure context. This is a routine change reflecting a new ephemeral sandbox session and carries no semantic or behavioral difference.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -440 chars
Tool description / BatchTooldescription -440 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.69 (external) -> claude-cli/0.2.70 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-440 chars, -4 lines)
toolsBatchTool / description	previous description	description changed (-440 chars, -4 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.69 (external)	claude-cli/0.2.70 (external)

v0.2.69

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, changing from `/tmp/tmp.317hnPaswJ` to `/tmp/tmp.LzIPRMMt27`. This is a session-specific environment value with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.68 (external) -> claude-cli/0.2.69 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.68 (external)	claude-cli/0.2.69 (external)

v0.2.68

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated from `/tmp/tmp.VWC0tg2GAl` to `/tmp/tmp.317hnPaswJ`, reflecting a new ephemeral session environment. This is a routine path change with no semantic or behavioral difference.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.67 (external) -> claude-cli/0.2.68 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.67 (external)	claude-cli/0.2.68 (external)

v0.2.67

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, changing from `/tmp/tmp.FO6jMtvGRk` to `/tmp/tmp.VWC0tg2GAl`. This is a routine environment refresh with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.66 (external) -> claude-cli/0.2.67 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.66 (external)	claude-cli/0.2.67 (external)

v0.2.66

Apr 22

trivial Apr 22, 2026

Temp directory path bump

The working directory and directory structure snapshot were updated to reflect a new temporary session path (`tmp.FO6jMtvGRk` replacing `tmp.0EREgqUeDv`). Three blank lines were added after the "Code style" section and one blank line was removed between the lint/typecheck instruction and the commit warning, but neither change affects behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+2 chars
Header / user_agentclaude-cli/0.2.65 (external) -> claude-cli/0.2.66 (external)

Split-view diff3 fields changedprompts · 2transport · 1

Field	Before	After
promptstotal prompt size	10,395 chars	10,397 chars (+2)
promptsblock 1	previous text	text changed (+2 chars)
transportheader / user_agent	claude-cli/0.2.65 (external)	claude-cli/0.2.66 (external)

v0.2.65

Apr 22

trivial Apr 22, 2026

Temp directory path rotated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path (`/tmp/tmp.0EREgqUeDv` replacing `/tmp/tmp.zOCrUKFsJo`). This is a routine environment reset with no semantic or behavioral change.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +2 chars
Tool description / BatchTooldescription +2 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.64 (external) -> claude-cli/0.2.65 (external)

Split-view diff4 fields changedtools · 2prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+2 chars, +2 lines)
toolsBatchTool / description	previous description	description changed (+2 chars, +2 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.64 (external)	claude-cli/0.2.65 (external)

v0.2.64

Apr 22

trivial Apr 22, 2026

Temp directory path refreshed

The working directory and directory structure snapshot were updated to reflect a new temporary directory path, replacing `/tmp/tmp.h2G7ZFRdHX` with `/tmp/tmp.zOCrUKFsJo`. This is a routine environment value refresh with no semantic or behavioral change.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.62 (external) -> claude-cli/0.2.64 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.62 (external)	claude-cli/0.2.64 (external)

v0.2.62

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary folder path, replacing `/tmp/tmp.Ao8yCurdc3` with `/tmp/tmp.h2G7ZFRdHX`. This is a routine environment variable change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.61 (external) -> claude-cli/0.2.62 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.61 (external)	claude-cli/0.2.62 (external)

v0.2.61

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated to reflect a new randomly-generated temporary path, replacing `/tmp/tmp.14povDO9l5` with `/tmp/tmp.Ao8yCurdc3`. This is a session-specific environment value with no semantic change to the prompt's behavior.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.60 (external) -> claude-cli/0.2.61 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.60 (external)	claude-cli/0.2.61 (external)

v0.2.60

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path. This is a session-specific environment value change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.59 (external) -> claude-cli/0.2.60 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.59 (external)	claude-cli/0.2.60 (external)

v0.2.59

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated from `/tmp/tmp.2HS9PfNqFz` to `/tmp/tmp.H9nXMQKL9B`, reflecting a new ephemeral session environment. This is a routine environment value change with no semantic or behavioral impact.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription -180 chars
Tool schema / Bashproperties +description
Tool description / BatchTooldescription +145 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.57 (external) -> claude-cli/0.2.59 (external)

Split-view diff5 fields changedtools · 2schemas · 1prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (-180 chars)
schemasBash	previous schema	now has: description
toolsBatchTool / description	previous description	description changed (+145 chars, +11 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.57 (external)	claude-cli/0.2.59 (external)

v0.2.57

Apr 22

trivial Apr 22, 2026

Temporary working directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary path (`/tmp/tmp.2HS9PfNqFz` replacing `/tmp/tmp.1GaCH5UGGu`). This is a session-specific environment value with no semantic or behavioral change.

PromptsSchemasToolsTransportLow signal

Change details

Changed artifacts

Tool description / BatchTooldescription +1,073 chars
Tool description / Editdescription +661 chars
Tool schema / Editproperties +expected_replacements
Tool schema / GlobToolschema changed
Tool description / Viewdescription +90 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.56 (external) -> claude-cli/0.2.57 (external)

Split-view diff7 fields changedtools · 3schemas · 2prompts · 1transport · 1

Field	Before	After
toolsBatchTool / description	previous description	description changed (+1,073 chars, +6 lines)
toolsEdit / description	previous description	description changed (+661 chars, +5 lines)
schemasEdit	previous schema	now has: expected_replacements
schemasGlobTool	previous schema	updated schema
toolsView / description	previous description	description changed (+90 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.56 (external)	claude-cli/0.2.57 (external)

v0.2.56

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path. This is a session-specific environment value change with no semantic or behavioral impact.

PromptsToolsTransportLow signal

Change details

Changed artifacts

Tool description / Bashdescription +99 chars
Tool description / BatchTooldescription +403 chars
Tool description / Viewdescription +304 chars
Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.55 (external) -> claude-cli/0.2.56 (external)

Split-view diff5 fields changedtools · 3prompts · 1transport · 1

Field	Before	After
toolsBash / description	previous description	description changed (+99 chars, +3 lines)
toolsBatchTool / description	previous description	description changed (+403 chars, +4 lines)
toolsView / description	previous description	description changed (+304 chars, +1 lines)
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.55 (external)	claude-cli/0.2.56 (external)

v0.2.55

Apr 22

trivial Apr 22, 2026

Temp directory path updated

The working directory and directory structure snapshot were updated to reflect a new temporary directory path (`/tmp/tmp.Naz6PUCJRF` replacing `/tmp/tmp.5KymrY1uTF`). This is a routine session-level environment change with no semantic or behavioral impact.

PromptsTransportLow signal

Change details

Changed artifacts

Prompt block / 1+0 chars
Header / user_agentclaude-cli/0.2.54 (external) -> claude-cli/0.2.55 (external)

Split-view diff2 fields changedprompts · 1transport · 1

Field	Before	After
promptsblock 1	previous text	text changed (0 chars net)
transportheader / user_agent	claude-cli/0.2.54 (external)	claude-cli/0.2.55 (external)

v0.2.54

Apr 22

baseline Apr 22, 2026

v0.2.54 baseline

Initial captured version — no adjacent comparison.

Low signal

Change details

Changed artifacts

BaselineNo adjacent-version diff.

Split-view diffbaseline · nothing to compare

This is the earliest captured version, so there is no adjacent diff to render.