Support Plan mode in the CLI and TS SDK #13377

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1. gsabran

   added

   enhancementNew feature or requestNew feature or request

   on Mar 3, 2026
2. github-actions

   added

   CLIIssues related to the Codex CLIIssues related to the Codex CLI

   on Mar 3, 2026
3. etraut-openai commented on Mar 3, 2026

   

   etraut-openai

   on Mar 3, 2026

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   The CLI does support plan mode. Just use the /plan slash command to toggle.
4. gsabran commented on Mar 3, 2026

   

   gsabran

   on Mar 3, 2026

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   I meant in headless mode, ie the CLI doesn't have a parameter to be prompted in plan mode (updated the description)
5. etraut-openai

   added

   execIssues related to the `codex exec` subcommandIssues related to the `codex exec` subcommand

   and removed

   CLIIssues related to the Codex CLIIssues related to the Codex CLI

   on Mar 3, 2026
6. gsabran commented on Mar 3, 2026

   

   gsabran

   on Mar 3, 2026

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   There seem to be a comment indicating interest to support this:

   codex/codex-rs/core/src/codex.rs

   Lines 449 to 450 in 745c48b

   	// TODO (aibrahim): Consolidate config.model and config.model_reasoning_effort into config.collaboration_mode
   	// to avoid extracting these fields separately and constructing CollaborationMode here.
7. gsabran commented on Mar 3, 2026

   

   gsabran

   on Mar 3, 2026

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   I made a PR, I don't think I can open it as I'm not a collaborator to this repo:

   https://github.com/openai/codex/compare/main...gsabran:gui/plan-exec?expand=1
8. g-imhoff commented on Mar 9, 2026

   

   g-imhoff

   on Mar 9, 2026

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   Also very interested about getting this !
9. 0xble commented on Mar 25, 2026

   

   0xble

   on Mar 25, 2026

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   Strong +1 on this.

   The missing piece is not interactive /plan, it is a first-class startup parameter for Plan mode.

   What would be most ergonomic is something like:

   • codex --plan
   • codex --plan "investigate this repo and propose a fix"

   Possibly also:

   • codex exec --plan "..."

   Why this matters:

   • /plan only works after the session starts
   • wrappers and orchestrators cannot express startup intent cleanly
   • prompt-level /plan shims are brittle and less discoverable than a real flag
   • this matches precedent from Claude, which exposes startup plan mode via --permission-mode plan

   I would treat this as distinct from "Plan mode exists" and closer to "Plan mode is not addressable as a first-class CLI startup mode".

   👍React with 👍1Reacted by Brian Luerssen
10. bluerssen commented on May 7, 2026

    

    bluerssen

    on May 7, 2026

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    Still looking for this. This should be possible via SDK. I'd be happy to do PR to add it in.
11. etraut-openai commented on May 7, 2026

    

    etraut-openai

    on May 7, 2026

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    The SDK is intended for non-interactive automation use cases. Plan mode is an interactive feature, so it's not something that's exposed in codex exec (upon which the SDK is built).

    If you'd like to use plan mode in a custom client, I recommend building your client on the app server API.
12. etraut-openai

    closed this as not plannedon May 7, 2026