fix(server): respect Codex default-mode user input

[none23]

What Changed

When Codex enables default_mode_request_user_input, the tool can now be used normally. When the flag is absent or disabled, Codex does not advertise the tool and existing behavior remains unchanged.

Why

T3 Code always told Codex that request_user_input was unavailable in Default mode. That instruction conflicted with Codex’s default_mode_request_user_input feature flag when users explicitly enabled it.

Fixes #5282

UI Changes

No UI components changed. This uses the existing structured user-input interface.

Feature enabled:

Feature disabled / no override:

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes - N/A

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Note

Low Risk
Prompt-only change in CodexDeveloperInstructions.ts; no runtime logic, auth, or data paths.

Overview
Codex Default mode developer instructions no longer claim request_user_input is always unavailable. They now tell the model to use that tool only when it appears in the turn’s tool list, matching when T3 Code exposes it (e.g. with Codex’s default_mode_request_user_input flag).

When a question is still required, the guidance is updated to prefer request_user_input if listed, otherwise a concise plain-text question—instead of always directing plain-text only.

^{Reviewed by Cursor Bugbot for commit 6f0acd9. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Fix request_user_input tool usage instructions for Codex default mode

Updates the developer instructions in CodexDeveloperInstructions.ts to correctly handle request_user_input availability in Default mode. Previously, the instructions stated the tool was unavailable in Default mode; now they direct the model to use it only when it appears in the available tools list for the turn, and to fall back to a plain-text question otherwise.

^{Macroscope summarized 6f0acd9.}

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[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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[macroscopeapp]

Approvability

Verdict: Approved 87bbe6a

This PR makes a minor text clarification to AI developer instructions, refining guidance about when the request_user_input tool should be used. The change is simple, limited in scope, and has no code logic or security implications.

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