/experimental doesn’t list collaboration_mode but /plan requires it (v0.93.0)

Summary

In Codex CLI v0.93.0, /plan requires collaboration_mode (per the GitHub issues linked from the changelog). However, /experimental does not list collaboration_mode among toggleable features, so there’s no discoverable way to enable the gate from within the CLI.

Expected

Because /plan requires collaboration_mode and the feature is user-toggleable, /experimental should list collaboration_mode so users can enable it.

Actual

/experimental lists other toggleable experimental features, but not collaboration_mode.

Example output:

Experimental features
Toggle experimental features. Changes are saved to config.toml.

› [x] Background terminal Run long-running terminal commands in the background.
[x] Shell snapshot Snapshot your shell environment to avoid re-running login scripts for every command.
[x] Steer conversation Enter submits immediately; Tab queues messages when a task is running.

Press enter to toggle or esc to save for next conversation

Version / Environment

• Codex CLI: v0.93.0
• OS: macOS 26.2 (Build 25C56)
• Install method: Homebrew
• codex --version output: codex-cli 0.93.0
• Any relevant config entries:
• (e.g. features.* in ~/.codex/config.toml)

References

• Changelog entry for v0.93.0 describing /plan and feature gating:

https://developers.openai.com/codex/changelog/

• GitHub issue linked from the changelog that state /plan requires collaboration_mode: