Codex CLI

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1. 202662 versions
2. v0.148.0

   Aug 20
   trivial Aug 20, 2026

   Identical system prompt

   The system prompt is byte-identical to the previous version; no changes.

   TransportLow signal

   Change details

   Changed artifacts

   • Header / user_agentcodex_exec/0.147.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.147.0) -> codex_exec/0.148.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.148.0)

   Split-view diff1 field changedtransport · 1

   Field	Before	After
   transportheader / user_agent	codex_exec/0.147.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.147.0)	codex_exec/0.148.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.148.0)

3. v0.147.0

   Aug 20
   trivial Aug 20, 2026

   Identical system prompt

   The system prompt is byte-identical to the previous version; no changes.

   TransportLow signal

   Change details

   Changed artifacts

   • Header / user_agentcodex_exec/0.146.1 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.1) -> codex_exec/0.147.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.147.0)

   Split-view diff1 field changedtransport · 1

   Field	Before	After
   transportheader / user_agent	codex_exec/0.146.1 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.1)	codex_exec/0.147.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.147.0)

4. v0.146.1

   Aug 20
   trivial Aug 20, 2026

   Identical system prompt

   The system prompt is byte-identical to the previous version; no changes.

   TransportLow signal

   Change details

   Changed artifacts

   • Header / user_agentcodex_exec/0.146.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.0) -> codex_exec/0.146.1 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.1)

   Split-view diff1 field changedtransport · 1

   Field	Before	After
   transportheader / user_agent	codex_exec/0.146.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.0)	codex_exec/0.146.1 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.1)

5. v0.146.0

   Aug 20
   trivial Aug 20, 2026

   Identical system prompt

   The system prompt is byte-identical to the previous version; no changes.

   TransportLow signal

   Change details

   Changed artifacts

   • Header / user_agentcodex_exec/0.145.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.145.0) -> codex_exec/0.146.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.0)

   Split-view diff1 field changedtransport · 1

   Field	Before	After
   transportheader / user_agent	codex_exec/0.145.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.145.0)	codex_exec/0.146.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.146.0)

6. v0.145.0

   Aug 20
   trivial Aug 20, 2026

   Identical system prompt

   The system prompt is byte-identical to the previous version; no changes.

   TransportLow signal

   Change details

   Changed artifacts

   • Header / user_agentcodex_exec/0.144.6 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.6) -> codex_exec/0.145.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.145.0)

   Split-view diff1 field changedtransport · 1

   Field	Before	After
   transportheader / user_agent	codex_exec/0.144.6 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.6)	codex_exec/0.145.0 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.145.0)

7. v0.144.6

   Aug 20
   major Aug 20, 2026

   Adds destructive-action safety section

   A new "Destructive Actions" section was added with explicit pre-flight rules for delete/overwrite operations, including prohibitions on broad recursive targets, requirements to use `mktemp -d`, and a mandate to report what was removed afterward. The reasoning guideline about evidence-based responses to user objections was moved from the persona section into the task-execution section, and a new rule against repurposing system environment variables like `$HOME` or `$CODEX_HOME` was inserted into the shell-command constraints. Minor wording cleanup was also applied to the ASCII-diagram guidance and skill-listing quotes.

   PromptsTransport

   Change details

   Changed artifacts

   • Prompt block / 0+1,431 chars
   • Header / user_agentcodex_exec/0.144.5 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.5) -> codex_exec/0.144.6 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.6)

   Split-view diff3 fields changedprompts · 2transport · 1

   Field	Before	After
   promptstotal prompt size	16,299 chars	17,730 chars (+1,431)
   promptsblock 0	previous text	text changed (+1,431 chars)
   transportheader / user_agent	codex_exec/0.144.5 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.5)	codex_exec/0.144.6 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.6)

8. v0.144.5

   Aug 20
   trivial Aug 20, 2026

   Identical system prompt

   The system prompt is byte-identical to the previous version; no changes.

   TransportLow signal

   Change details

   Changed artifacts

   • Header / user_agentcodex_exec/0.144.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.4) -> codex_exec/0.144.5 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.5)

   Split-view diff1 field changedtransport · 1

   Field	Before	After
   transportheader / user_agent	codex_exec/0.144.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.4)	codex_exec/0.144.5 (Debian 12.0.0; x86_64) vscode/1.134.0 (codex_exec; 0.144.5)

9. v0.144.4

   Jul 15
   trivial Jul 15, 2026

   Identical system prompt

   The system prompt is byte-identical to the previous version; no changes.

   TransportLow signal

   Change details

   Changed artifacts

   • Header / user_agentcodex_exec/0.144.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.3) -> codex_exec/0.144.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.4)

   Split-view diff1 field changedtransport · 1

   Field	Before	After
   transportheader / user_agent	codex_exec/0.144.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.3)	codex_exec/0.144.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.4)

10. v0.144.3

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.144.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.2) -> codex_exec/0.144.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.3)

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.144.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.2)	codex_exec/0.144.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.3)

11. v0.144.2

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.144.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.1) -> codex_exec/0.144.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.2)

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.144.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.1)	codex_exec/0.144.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.2)

12. v0.144.1

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.144.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.0) -> codex_exec/0.144.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.1)

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.144.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.0)	codex_exec/0.144.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.1)

13. v0.144.0

    Jul 15
    major Jul 15, 2026

    Major persona and workflow overhaul

    The persona was substantially rewritten from a terse, pragmatic senior-engineer voice to a warmer, curiosity-driven communicator that adapts to user tone. Large swaths of frontend design rules, engineering judgment guidelines, and git/editing constraints were condensed or removed, replaced with a cleaner autonomy model and more explicit commentary/final-channel guidance. Skill-use instructions were restructured with alias resolution, clearer trigger rules, and new transparency requirements around skill announcements.

    ModelPromptsSchemasToolsTransport

    Change details

    Changed artifacts

    • Tool removed / apply_patchtool removed
    • Schema removed / apply_patchinput schema removed
    • Tool removed / create_goaltool removed
    • Schema removed / create_goalinput schema removed
    • Tool removed / exec_commandtool removed
    • Schema removed / exec_commandinput schema removed
    • Tool removed / get_goaltool removed
    • Schema removed / get_goalinput schema removed
    • Tool removed / request_user_inputtool removed
    • Schema removed / request_user_inputinput schema removed
    • Tool removed / update_goaltool removed
    • Schema removed / update_goalinput schema removed
    • Tool removed / update_plantool removed
    • Schema removed / update_planinput schema removed
    • Tool removed / view_imagetool removed
    • Schema removed / view_imageinput schema removed
    • Tool removed / write_stdintool removed
    • Schema removed / write_stdininput schema removed
    • Prompt block / 0-5,036 chars
    • Prompt block / 1removed
    • Model setting / modelgpt-5.5 -> gpt-5.6-sol
    • Model setting / thinking{"effort": "medium"} -> {"context": "all_turns", "effort": "low"}
    • Header / user_agentcodex_exec/0.143.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.143.0) -> codex_exec/0.144.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.0)

    Split-view diff16 fields changedtools · 10prompts · 3model · 2transport · 1

    Field	Before	After
    toolsapply_patch	present	—
    toolscreate_goal	present	—
    toolsexec_command	present	—
    toolsget_goal	present	—
    toolsrequest_user_input	present	—
    toolsupdate_goal	present	—
    toolsupdate_plan	present	—
    toolsview_image	present	—
    toolswrite_stdin	present	—
    toolstool count	11	0
    promptstotal prompt size	27,781 chars	16,299 chars (-11,482)
    promptsblock 0	previous text	text changed (-5,036 chars)
    promptsblock 1	prompt block present	—
    modelmodel	gpt-5.5	gpt-5.6-sol
    modelthinking	{"effort": "medium"}	{"context": "all_turns", "effort": "low"}
    transportheader / user_agent	codex_exec/0.143.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.143.0)	codex_exec/0.144.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.144.0)

14. v0.143.0

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.142.5 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.5) -> codex_exec/0.143.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.143.0)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.142.5 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.5)	codex_exec/0.143.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.143.0)

15. v0.142.5

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.142.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.4) -> codex_exec/0.142.5 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.5)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.142.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.4)	codex_exec/0.142.5 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.5)

16. v0.142.4

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.142.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.3) -> codex_exec/0.142.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.4)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.142.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.3)	codex_exec/0.142.4 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.4)

17. v0.142.3

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.142.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.2) -> codex_exec/0.142.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.3)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.142.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.2)	codex_exec/0.142.3 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.3)

18. v0.142.2

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.142.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.1) -> codex_exec/0.142.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.2)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.142.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.1)	codex_exec/0.142.2 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.2)

19. v0.142.1

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.142.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.0) -> codex_exec/0.142.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.1)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.142.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.0)	codex_exec/0.142.1 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.1)

20. v0.142.0

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.141.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.141.0) -> codex_exec/0.142.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.0)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.141.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.141.0)	codex_exec/0.142.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.142.0)

21. v0.141.0

    Jul 15
    trivial Jul 15, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.140.0 (Debian 12.0.0; x86_64) vscode/1.124.2 (codex_exec; 0.140.0) -> codex_exec/0.141.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.141.0)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.140.0 (Debian 12.0.0; x86_64) vscode/1.124.2 (codex_exec; 0.140.0)	codex_exec/0.141.0 (Debian 12.0.0; x86_64) vscode/1.128.1 (codex_exec; 0.141.0)

22. v0.140.0

    Jun 16
    major Jun 16, 2026

    Skills system gains multi-locator support

    The skills framework was expanded beyond filesystem-only `SKILL.md` paths to support multiple resource locator types: `file`, `environment resource`, `orchestrator resource`, and `custom resource`. Reading instructions were substantially rewritten to handle each locator type distinctly, including using `skills.list`/`skills.read` for orchestrator-backed skills and explicit rules against treating `skill://` URIs as filesystem paths. Temporary file paths in skill entries were also scrubbed to a generic `<scrub>` placeholder, and the context-hygiene rule was clarified to distinguish progressive disclosure of files from partial reading of a selected instruction file.

    PromptsSchemasToolsTransport

    Change details

    Changed artifacts

    • Tool description / create_goaldescription +12 chars
    • Tool schema / create_goalschema changed
    • Tool description / request_user_inputdescription +230 chars
    • Tool schema / request_user_inputproperties +autoResolutionMs
    • Prompt block / 1+1,319 chars
    • Header / user_agentcodex_exec/0.137.0 (Debian 12.0.0; x86_64) vscode/1.123.0 (codex_exec; 0.137.0) -> codex_exec/0.140.0 (Debian 12.0.0; x86_64) vscode/1.124.2 (codex_exec; 0.140.0)

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

    Field	Before	After
    toolscreate_goal / description	previous description	description changed (+12 chars)
    schemascreate_goal	previous schema	updated schema
    toolsrequest_user_input / description	previous description	description changed (+230 chars)
    schemasrequest_user_input	previous schema	now has: autoResolutionMs
    promptstotal prompt size	26,462 chars	27,781 chars (+1,319)
    promptsblock 1	previous text	text changed (+1,319 chars)
    transportheader / user_agent	codex_exec/0.137.0 (Debian 12.0.0; x86_64) vscode/1.123.0 (codex_exec; 0.137.0)	codex_exec/0.140.0 (Debian 12.0.0; x86_64) vscode/1.124.2 (codex_exec; 0.140.0)

23. v0.137.0

    Jun 8
    trivial Jun 8, 2026

    Temp directory path update for skills

    All five skill file paths were updated to reflect a new temporary directory (`tmp.QPMjZ98n8e` replacing `tmp.oVuDm9MzQQ`). This is a purely mechanical environment path change with no semantic or behavioral impact on skill usage.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.136.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.136.0) -> codex_exec/0.137.0 (Debian 12.0.0; x86_64) vscode/1.123.0 (codex_exec; 0.137.0)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.136.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.136.0)	codex_exec/0.137.0 (Debian 12.0.0; x86_64) vscode/1.123.0 (codex_exec; 0.137.0)

24. v0.136.0

    Jun 3
    notable Jun 3, 2026

    openai-docs skill gains Codex self-knowledge

    The `openai-docs` skill description was updated to explicitly cover questions about Codex itself and choosing Codex surfaces, and its routing logic was refined to prefer a "Codex manual helper" for broad Codex self-knowledge questions before falling back to general OpenAI docs MCP tools. All other skill entries were unchanged in substance; only the temporary working-directory path segment changed across all entries.

    PromptsSchemasTransport

    Change details

    Changed artifacts

    • Tool schema / create_goalschema changed
    • Tool schema / exec_commandschema changed
    • Tool schema / update_planschema changed
    • Tool schema / view_imageschema changed
    • Tool schema / write_stdinschema changed
    • Prompt block / 1+86 chars
    • Header / user_agentcodex_exec/0.135.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.135.0) -> codex_exec/0.136.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.136.0)

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

    Field	Before	After
    schemascreate_goal	previous schema	updated schema
    schemasexec_command	previous schema	updated schema
    schemasupdate_plan	previous schema	updated schema
    schemasview_image	previous schema	updated schema
    schemaswrite_stdin	previous schema	updated schema
    promptstotal prompt size	26,376 chars	26,462 chars (+86)
    promptsblock 1	previous text	text changed (+86 chars)
    transportheader / user_agent	codex_exec/0.135.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.135.0)	codex_exec/0.136.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.136.0)

25. v0.135.0

    Jun 3
    trivial Jun 3, 2026

    Temp directory path updated in skill refs

    All five skill file paths were updated from a stale temporary directory (`tmp.Eyex98DeX0`) to a new one (`tmp.o06kAeh61R`), reflecting a change in the runtime environment. No skill descriptions, names, or behavioral instructions were modified.

    PromptsToolsTransportLow signal

    Change details

    Changed artifacts

    • Tool description / view_imagedescription -47 chars
    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.134.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.134.0) -> codex_exec/0.135.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.135.0)

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

    Field	Before	After
    toolsview_image / description	previous description	description changed (-47 chars)
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.134.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.134.0)	codex_exec/0.135.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.135.0)

26. v0.134.0

    Jun 3
    trivial Jun 3, 2026

    Skill file temp path updated

    The hardcoded temporary directory paths for all five system skill SKILL.md files were updated from `/tmp/tmp.<scrub>/` to `/tmp/claude-1000/tmp.Eyex98DeX0/`. This is a runtime environment artifact change with no semantic or behavioral impact.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+60 chars
    • Header / user_agentcodex_exec/0.133.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.133.0) -> codex_exec/0.134.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.134.0)

    Split-view diff3 fields changedprompts · 2transport · 1

    Field	Before	After
    promptstotal prompt size	26,316 chars	26,376 chars (+60)
    promptsblock 1	previous text	text changed (+60 chars)
    transportheader / user_agent	codex_exec/0.133.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.133.0)	codex_exec/0.134.0 (Debian 12.0.0; x86_64) vscode/1.122.1 (codex_exec; 0.134.0)

27. v0.133.0

    May 26
    notable May 26, 2026

    Plugin-creator skill gains update flow

    The `plugin-creator` skill description was expanded to include a new use case: updating an existing local plugin during development using a CLI-driven cachebuster and reinstall flow. This broadens the skill's declared scope beyond initial creation and marketplace entry management to cover iterative plugin development.

    PromptsSchemasToolsTransport

    Change details

    Changed artifacts

    • Tool added / create_goalnew tool description
    • Schema added / create_goalnew input schema
    • Tool added / get_goalnew tool description
    • Schema added / get_goalnew input schema
    • Tool added / update_goalnew tool description
    • Schema added / update_goalnew input schema
    • Tool removed / close_agenttool removed
    • Schema removed / close_agentinput schema removed
    • Tool removed / resume_agenttool removed
    • Schema removed / resume_agentinput schema removed
    • Tool removed / send_inputtool removed
    • Schema removed / send_inputinput schema removed
    • Tool removed / spawn_agenttool removed
    • Schema removed / spawn_agentinput schema removed
    • Tool removed / wait_agenttool removed
    • Schema removed / wait_agentinput schema removed
    • Prompt block / 1+103 chars
    • Header / user_agentcodex_exec/0.132.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.132.0) -> codex_exec/0.133.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.133.0)

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

    Field	Before	After
    toolscreate_goal	—	added
    toolsget_goal	—	added
    toolsupdate_goal	—	added
    toolsclose_agent	present	—
    toolsresume_agent	present	—
    toolssend_input	present	—
    toolsspawn_agent	present	—
    toolswait_agent	present	—
    toolstool count	12	11
    promptstotal prompt size	26,213 chars	26,316 chars (+103)
    promptsblock 1	previous text	text changed (+103 chars)
    transportheader / user_agent	codex_exec/0.132.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.132.0)	codex_exec/0.133.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.133.0)

28. v0.132.0

    May 26
    minor May 26, 2026

    Plugin-creator skill description updated

    The `plugin-creator` skill's description was revised to mention "valid manifest defaults" and "personal-marketplace entries by default" instead of the prior wording about "baseline placeholders" and explicit `.agents/plugins/marketplace.json` path references. The change also simplifies the trigger condition by dropping the verbose "personal or repo-root" qualifier around marketplace entries.

    PromptsSchemasToolsTransport

    Change details

    Changed artifacts

    • Tool description / spawn_agentdescription -1,474 chars
    • Tool schema / view_imageschema changed
    • Prompt block / 1-44 chars
    • Header / user_agentcodex_exec/0.131.0 (Debian 12.0.0; x86_64) vscode/1.120.0 (codex_exec; 0.131.0) -> codex_exec/0.132.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.132.0)

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

    Field	Before	After
    toolsspawn_agent / description	previous description	description changed (-1,474 chars)
    schemasview_image	previous schema	updated schema
    promptstotal prompt size	26,257 chars	26,213 chars (-44)
    promptsblock 1	previous text	text changed (-44 chars)
    transportheader / user_agent	codex_exec/0.131.0 (Debian 12.0.0; x86_64) vscode/1.120.0 (codex_exec; 0.131.0)	codex_exec/0.132.0 (Debian 12.0.0; x86_64) vscode/1.121.0 (codex_exec; 0.132.0)

29. v0.131.0

    May 19
    minor May 19, 2026

    Plugin-creator adds personal plugin scope

    The plugin-creator skill description was updated to replace "local plugin" with "personal plugin" and to explicitly mention that marketplace.json entries can be generated or updated at both the personal and repo-root levels. This clarifies that the skill supports user-scoped plugins in addition to repository-scoped ones.

    PromptsSchemasToolsTransport

    Change details

    Changed artifacts

    • Tool description / spawn_agentdescription +236 chars
    • Tool schema / spawn_agentproperties +service_tier
    • Prompt block / 1+15 chars
    • Header / user_agentcodex_exec/0.130.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.130.0) -> codex_exec/0.131.0 (Debian 12.0.0; x86_64) vscode/1.120.0 (codex_exec; 0.131.0)

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

    Field	Before	After
    toolsspawn_agent / description	previous description	description changed (+236 chars)
    schemasspawn_agent	previous schema	now has: service_tier
    promptstotal prompt size	26,242 chars	26,257 chars (+15)
    promptsblock 1	previous text	text changed (+15 chars)
    transportheader / user_agent	codex_exec/0.130.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.130.0)	codex_exec/0.131.0 (Debian 12.0.0; x86_64) vscode/1.120.0 (codex_exec; 0.131.0)

30. v0.130.0

    May 9
    trivial May 9, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.129.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.129.0) -> codex_exec/0.130.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.130.0)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.129.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.129.0)	codex_exec/0.130.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.130.0)

31. v0.129.0

    May 9
    trivial May 9, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.128.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.128.0) -> codex_exec/0.129.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.129.0)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.128.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.128.0)	codex_exec/0.129.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.129.0)

32. v0.128.0

    May 6
    trivial May 6, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsTransportLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars
    • Header / user_agentnull -> codex_exec/0.128.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.128.0)

    Split-view diff2 fields changedprompts · 1transport · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	null	codex_exec/0.128.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex_exec; 0.128.0)

33. v0.125.0

    Apr 29
    major Apr 29, 2026

    Adds extensive frontend and engineering-judgment guidance

    The update adds two large new sections: a detailed "Engineering judgment" block prescribing conservative, codebase-sympathetic implementation choices, and a comprehensive "Frontend guidance" block covering design empathy, UI component rules, typography, layout, 3D/Three.js, and responsive constraints. The old "Frontend tasks" section (which pushed bold, anti-"AI slop" aesthetics) was removed and replaced by the more structured and prescriptive frontend guidance. Persona, workflow, and intermediary-update instructions were also extensively reworded in a more conversational first-person voice, and several new commentary rules were added (e.g., checklist incremental updates, anti-goblin/creature clause, and ghost-request sanity check on resume).

    ModelPromptsTools

    Change details

    Changed artifacts

    • Tool description / spawn_agentdescription +369 chars
    • Prompt block / 0+6,603 chars
    • Prompt block / 1+0 chars
    • Model setting / modelgpt-5.4 -> gpt-5.5

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

    Field	Before	After
    toolsspawn_agent / description	previous description	description changed (+369 chars, +1 lines)
    promptstotal prompt size	19,639 chars	26,242 chars (+6,603)
    promptsblock 0	previous text	text changed (+6,603 chars)
    promptsblock 1	previous text	text changed (0 chars net)
    modelmodel	gpt-5.4	gpt-5.5

34. v0.124.0

    Apr 23
    minor Apr 23, 2026

    Remove GPT-5.4-specific upgrade mention

    The `openai-docs` skill description replaced the explicit "GPT-5.4 upgrade" reference with the generic phrase "model upgrade," removing a hard-coded model version from the trigger condition. This is a minor wording tweak that slightly broadens the skill's stated scope without changing its underlying behavior.

    Prompts

    Change details

    Changed artifacts

    • Prompt block / 1-11 chars

    Split-view diff2 fields changedprompts · 2

    Field	Before	After
    promptstotal prompt size	19,650 chars	19,639 chars (-11)
    promptsblock 1	previous text	text changed (-11 chars)

35. v0.123.0

    Apr 23
    major Apr 23, 2026

    Major persona, workflow, and formatting overhaul

    This version introduces a top-level expert-coding-agent persona statement, promotes `apply_patch` from preferred to mandatory for manual edits, and significantly rewrites the final-answer formatting rules to favor concise prose over bullets and long explanations. The autonomy/persistence section was moved earlier in the document, unexpected-change handling was softened from "stop immediately" to "only stop if it conflicts with your task," and bash command chaining (e.g. `echo "===="`) was explicitly banned. User-update frequency shifted from every 20s to every 30s, and React best-practice guidance was added to the frontend section.

    ModelPromptsSchemasTools

    Change details

    Changed artifacts

    • Tool description / spawn_agentdescription -381 chars
    • Tool schema / spawn_agentschema changed
    • Prompt block / 0+2,389 chars
    • Prompt block / 1+0 chars
    • Model setting / modelgpt-5.3-codex -> gpt-5.4

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

    Field	Before	After
    toolsspawn_agent / description	previous description	description changed (-381 chars, -1 lines)
    schemasspawn_agent	previous schema	updated schema
    promptstotal prompt size	17,261 chars	19,650 chars (+2,389)
    promptsblock 0	previous text	text changed (+2,389 chars)
    promptsblock 1	previous text	text changed (0 chars net)
    modelmodel	gpt-5.3-codex	gpt-5.4

36. v0.122.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars

    Split-view diff1 field changedprompts · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)

37. v0.121.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsSchemasLow signal

    Change details

    Changed artifacts

    • Tool schema / view_imageproperties +detail
    • Prompt block / 1+0 chars

    Split-view diff2 fields changedschemas · 1prompts · 1

    Field	Before	After
    schemasview_image	previous schema	now has: detail
    promptsblock 1	previous text	text changed (0 chars net)

38. v0.120.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars

    Split-view diff1 field changedprompts · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)

39. v0.119.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsToolsLow signal

    Change details

    Changed artifacts

    • Tool description / spawn_agentdescription -6 chars
    • Prompt block / 1+0 chars

    Split-view diff2 fields changedtools · 1prompts · 1

    Field	Before	After
    toolsspawn_agent / description	previous description	description changed (-6 chars, +3 lines)
    promptsblock 1	previous text	text changed (0 chars net)

40. v0.118.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsLow signal

    Change details

    Changed artifacts

    • Prompt block / 1+0 chars

    Split-view diff1 field changedprompts · 1

    Field	Before	After
    promptsblock 1	previous text	text changed (0 chars net)

41. v0.117.0

    Apr 23
    notable Apr 23, 2026

    Two new system skills added

    Two new built-in skills were registered in the available skills list: `imagegen`, for AI-generated or AI-edited raster/bitmap images, and `plugin-creator`, for scaffolding Codex plugin directories and marketplace metadata. These expand the assistant's out-of-the-box capability surface without changing any existing skills or workflow logic.

    PromptsSchemasTools

    Change details

    Changed artifacts

    • Tool description / close_agentdescription +44 chars
    • Tool schema / close_agentproperties +target / properties -id / required changed
    • Tool schema / send_inputproperties +target / properties -id / required changed
    • Tool description / spawn_agentdescription -27 chars
    • Tool schema / wait_agentproperties +targets / properties -ids / required changed
    • Prompt block / 1+1,141 chars

    Split-view diff7 fields changedschemas · 3tools · 2prompts · 2

    Field	Before	After
    toolsclose_agent / description	previous description	description changed (+44 chars)
    schemasclose_agent	had: id · required list changed	now has: target · required list changed
    schemassend_input	had: id · required list changed	now has: target · required list changed
    toolsspawn_agent / description	previous description	description changed (-27 chars)
    schemaswait_agent	had: ids · required list changed	now has: targets · required list changed
    promptstotal prompt size	16,120 chars	17,261 chars (+1,141)
    promptsblock 1	previous text	text changed (+1,141 chars)

42. v0.116.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    PromptsToolsTransportLow signal

    Change details

    Changed artifacts

    • Tool description / close_agentdescription +28 chars
    • Prompt block / 1+0 chars
    • Header / user_agentcodex_exec/0.115.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.115.0) -> null

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

    Field	Before	After
    toolsclose_agent / description	previous description	description changed (+28 chars)
    promptsblock 1	previous text	text changed (0 chars net)
    transportheader / user_agent	codex_exec/0.115.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.115.0)	null

43. v0.115.0

    Apr 23
    major Apr 23, 2026

    Adds skill-discovery and execution system

    A new `<skills_instructions>` block introduces a full "Skills" subsystem, pre-loading three built-in skills (openai-docs, skill-creator, skill-installer) and defining detailed rules for triggering, loading, coordinating, and safely falling back on SKILL.md files. This is a significant new capability: the assistant can now discover and follow locally-stored instruction sets on demand, scoped per-turn. Engineers relying on consistent, stateless behavior should review the trigger and context-hygiene rules carefully.

    PromptsSchemasToolsTransport

    Change details

    Changed artifacts

    • Tool added / close_agentnew tool description
    • Schema added / close_agentnew input schema
    • Tool added / resume_agentnew tool description
    • Schema added / resume_agentnew input schema
    • Tool added / send_inputnew tool description
    • Schema added / send_inputnew input schema
    • Tool added / spawn_agentnew tool description
    • Schema added / spawn_agentnew input schema
    • Tool added / wait_agentnew tool description
    • Schema added / wait_agentnew input schema
    • Prompt block / 1+3,436 chars
    • Header / user_agentcodex_exec/0.114.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.114.0) -> codex_exec/0.115.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.115.0)

    Split-view diff9 fields changedtools · 6prompts · 2transport · 1

    Field	Before	After
    toolsclose_agent	—	added
    toolsresume_agent	—	added
    toolssend_input	—	added
    toolsspawn_agent	—	added
    toolswait_agent	—	added
    toolstool count	7	12
    promptstotal prompt size	12,684 chars	16,120 chars (+3,436)
    promptsblock 1	previous text	text changed (+3,436 chars)
    transportheader / user_agent	codex_exec/0.114.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.114.0)	codex_exec/0.115.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.115.0)

44. v0.114.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.113.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.113.0) -> codex_exec/0.114.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.114.0)

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.113.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.113.0)	codex_exec/0.114.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.114.0)

45. v0.113.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.112.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.113.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.113.0)

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.112.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.113.0 (Debian 12.0.0; x86_64) vscode/1.115.0 (codex-exec; 0.113.0)

46. v0.112.0

    Apr 23
    minor Apr 23, 2026

    Clarify file reference link rules

    The file-reference formatting rules were tightened: "clickable file paths" was simplified to "clickable files," "stand alone" was hyphenated to "stand-alone" and the semicolon-separated clause now explicitly instructs using inline code for non-clickable paths such as directories. These changes add actionable guidance for cases the previous wording left ambiguous.

    ModelPromptsTransport

    Change details

    Changed artifacts

    • Prompt block / 0+40 chars
    • Model setting / thinking{"effort": "medium", "summary": "auto"} -> {"effort": "medium"}
    • Header / user_agentcodex_exec/0.111.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.112.0 (Debian 12.0.0; x86_64) vscode/1.115.0

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

    Field	Before	After
    promptstotal prompt size	12,644 chars	12,684 chars (+40)
    promptsblock 0	previous text	text changed (+40 chars)
    modelthinking	{"effort": "medium", "summary": "auto"}	{"effort": "medium"}
    transportheader / user_agent	codex_exec/0.111.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.112.0 (Debian 12.0.0; x86_64) vscode/1.115.0

47. v0.111.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.110.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.111.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.110.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.111.0 (Debian 12.0.0; x86_64) vscode/1.115.0

48. v0.110.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.107.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.110.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.107.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.110.0 (Debian 12.0.0; x86_64) vscode/1.115.0

49. v0.107.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.106.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.107.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.106.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.107.0 (Debian 12.0.0; x86_64) vscode/1.115.0

50. v0.106.0

    Apr 23
    major Apr 23, 2026

    Major persona, workflow, and formatting overhaul

    The persona was stripped of its "quiet joy/enthusiasm" framing in favor of purely direct, factual communication, and cheerleading-acknowledgment language was removed entirely. The "Working with the user" section was substantially rewritten to introduce a two-channel model (commentary vs. final), explicit autonomy/persistence directives, detailed intermediary-update cadence rules, and revised file-reference conventions (markdown links instead of inline code). Several sections were removed or restructured, including the plan-tool guidance block, while tool-use gained a new parallel-calls directive and an instruction to avoid Python for simple file I/O.

    ModelPromptsTransport

    Change details

    Changed artifacts

    • Prompt block / 0+3,164 chars
    • Model setting / modelgpt-5.2-codex -> gpt-5.3-codex
    • Header / user_agentcodex_exec/0.105.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.106.0 (Debian 12.0.0; x86_64) vscode/1.115.0

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

    Field	Before	After
    promptstotal prompt size	9,480 chars	12,644 chars (+3,164)
    promptsblock 0	previous text	text changed (+3,164 chars)
    modelmodel	gpt-5.2-codex	gpt-5.3-codex
    transportheader / user_agent	codex_exec/0.105.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.106.0 (Debian 12.0.0; x86_64) vscode/1.115.0

51. v0.105.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    SchemasTransportLow signal

    Change details

    Changed artifacts

    • Tool schema / exec_commandschema changed
    • Header / user_agentcodex_exec/0.104.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.105.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff2 fields changedschemas · 1transport · 1

    Field	Before	After
    schemasexec_command	previous schema	updated schema
    transportheader / user_agent	codex_exec/0.104.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.105.0 (Debian 12.0.0; x86_64) vscode/1.115.0

52. v0.104.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.103.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.104.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.103.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.104.0 (Debian 12.0.0; x86_64) vscode/1.115.0

53. v0.103.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.102.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.103.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.102.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.103.0 (Debian 12.0.0; x86_64) vscode/1.115.0

54. v0.102.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    SchemasToolsTransportLow signal

    Change details

    Changed artifacts

    • Tool removed / list_mcp_resource_templatestool removed
    • Schema removed / list_mcp_resource_templatesinput schema removed
    • Tool removed / list_mcp_resourcestool removed
    • Schema removed / list_mcp_resourcesinput schema removed
    • Tool removed / read_mcp_resourcetool removed
    • Schema removed / read_mcp_resourceinput schema removed
    • Header / user_agentcodex_exec/0.101.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.102.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff5 fields changedtools · 4transport · 1

    Field	Before	After
    toolslist_mcp_resource_templates	present	—
    toolslist_mcp_resources	present	—
    toolsread_mcp_resource	present	—
    toolstool count	10	7
    transportheader / user_agent	codex_exec/0.101.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.102.0 (Debian 12.0.0; x86_64) vscode/1.115.0

55. v0.101.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.100.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.101.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.100.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.101.0 (Debian 12.0.0; x86_64) vscode/1.115.0

56. v0.100.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    SchemasTransportLow signal

    Change details

    Changed artifacts

    • Tool schema / exec_commandschema changed
    • Header / user_agentcodex_exec/0.99.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.100.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff2 fields changedschemas · 1transport · 1

    Field	Before	After
    schemasexec_command	previous schema	updated schema
    transportheader / user_agent	codex_exec/0.99.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.100.0 (Debian 12.0.0; x86_64) vscode/1.115.0

57. v0.99.0

    Apr 23
    major Apr 23, 2026

    Major persona and formatting overhaul

    Version 0.99.0 introduced a detailed Personality section defining Codex's values (clarity, pragmatism, rigor), interaction style, and escalation behavior. Formatting and presentation rules were reorganized from a single trailing section into structured guidance embedded earlier in the prompt, with several rules tightened or rewritten. A new constraint on non-interactive git commands was also added.

    PromptsTransport

    Change details

    Changed artifacts

    • Prompt block / 0+1,576 chars
    • Prompt block / 1-598 chars
    • Header / user_agentcodex_exec/0.98.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.99.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff4 fields changedprompts · 3transport · 1

    Field	Before	After
    promptstotal prompt size	8,502 chars	9,480 chars (+978)
    promptsblock 0	previous text	text changed (+1,576 chars)
    promptsblock 1	previous text	text changed (-598 chars)
    transportheader / user_agent	codex_exec/0.98.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.99.0 (Debian 12.0.0; x86_64) vscode/1.115.0

58. v0.98.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.97.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.98.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.97.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.98.0 (Debian 12.0.0; x86_64) vscode/1.115.0

59. v0.97.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    TransportLow signal

    Change details

    Changed artifacts

    • Header / user_agentcodex_exec/0.96.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.97.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff1 field changedtransport · 1

    Field	Before	After
    transportheader / user_agent	codex_exec/0.96.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.97.0 (Debian 12.0.0; x86_64) vscode/1.115.0

60. v0.96.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    SchemasToolsTransportLow signal

    Change details

    Changed artifacts

    • Tool added / exec_commandnew tool description
    • Schema added / exec_commandnew input schema
    • Tool added / write_stdinnew tool description
    • Schema added / write_stdinnew input schema
    • Tool removed / shell_commandtool removed
    • Schema removed / shell_commandinput schema removed
    • Header / user_agentcodex_exec/0.95.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.96.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff5 fields changedtools · 4transport · 1

    Field	Before	After
    toolsexec_command	—	added
    toolswrite_stdin	—	added
    toolsshell_command	present	—
    toolstool count	9	10
    transportheader / user_agent	codex_exec/0.95.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.96.0 (Debian 12.0.0; x86_64) vscode/1.115.0

61. v0.95.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    ToolsTransportLow signal

    Change details

    Changed artifacts

    • Tool description / request_user_inputdescription +42 chars
    • Header / user_agentcodex_exec/0.94.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.95.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff2 fields changedtools · 1transport · 1

    Field	Before	After
    toolsrequest_user_input / description	previous description	description changed (+42 chars)
    transportheader / user_agent	codex_exec/0.94.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.95.0 (Debian 12.0.0; x86_64) vscode/1.115.0

62. v0.94.0

    Apr 23
    trivial Apr 23, 2026

    Identical system prompt

    The system prompt is byte-identical to the previous version; no changes.

    SchemasToolsTransportLow signal

    Change details

    Changed artifacts

    • Tool added / request_user_inputnew tool description
    • Schema added / request_user_inputnew input schema
    • Header / user_agentcodex_exec/0.93.0 (Debian 12.0.0; x86_64) vscode/1.115.0 -> codex_exec/0.94.0 (Debian 12.0.0; x86_64) vscode/1.115.0

    Split-view diff3 fields changedtools · 2transport · 1

    Field	Before	After
    toolsrequest_user_input	—	added
    toolstool count	8	9
    transportheader / user_agent	codex_exec/0.93.0 (Debian 12.0.0; x86_64) vscode/1.115.0	codex_exec/0.94.0 (Debian 12.0.0; x86_64) vscode/1.115.0

63. v0.93.0

    Apr 23
    baseline Apr 23, 2026

    v0.93.0 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.