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codex - 💡(How to fix) Fix Feature request: toggle for automatic Plan/Implement mode switching [1 participants]

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openai/codex#19981•Fetched 2026-04-29 06:24:16
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Feature request

Add a user-controlled toggle that lets Codex automatically switch between Plan mode and Implement mode during its own workflow, then switch back when appropriate.

Problem

For larger tasks, Codex often needs to move through a natural loop: plan, ask or resolve blockers, implement, test, summarize, then return to planning if a new decision or blocker appears. When mode switching is manual, the user has to manage that workflow state explicitly, which interrupts momentum and makes the agent feel less continuous.

Proposed behavior

Introduce a toggle such as Allow automatic Plan/Implement switching. When enabled:

  • Codex can move from Plan mode to Implement mode once the necessary decisions, constraints, or approvals are satisfied.
  • Codex can return from Implement mode to Plan mode after completing implementation, hitting a blocker, finishing verification, or needing a new user decision.
  • Codex should announce each mode switch and briefly explain why it is switching.
  • The toggle should be easy to disable, preferably scoped per thread, workspace, or session.
  • Existing approval, sandbox, and permission settings should remain authoritative.

Why this helps

This would reduce manual coordination for multi-step engineering work while preserving user control. It would let Codex manage its own planning/implementation loop more naturally without requiring the user to repeatedly switch modes by hand.

extent analysis

TL;DR

Implementing an automatic mode-switching toggle in Codex can streamline workflow by reducing manual intervention.

Guidance

  • Introduce a user-controlled toggle, Allow automatic Plan/Implement switching, to enable automatic mode switching based on predefined conditions.
  • Define specific conditions for switching between Plan and Implement modes, such as completion of necessary decisions, constraints, or approvals.
  • Ensure the toggle is easily disableable, preferably on a per-thread, workspace, or session basis, to maintain user control.
  • Implement announcements for each mode switch, providing a brief explanation for the switch to keep the user informed.

Example

// Pseudocode example of mode switching conditions
if (decisionsMade && constraintsMet && approvalsObtained) {
  switchToImplementMode();
} else if (implementationComplete || blockerHit || verificationFinished || newDecisionNeeded) {
  switchToPlanMode();
}

Notes

The proposed behavior should be carefully designed to ensure seamless integration with existing approval, sandbox, and permission settings, maintaining their authority over the workflow.

Recommendation

Apply workaround: Implement the proposed Allow automatic Plan/Implement switching toggle to enhance user experience and reduce manual workflow management.

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codex - 💡(How to fix) Fix Feature request: toggle for automatic Plan/Implement mode switching [1 participants]