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codex/codex-rs/tui
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Eric Traut d667082322 Allow resume and settings commands during tasks and MCP startup (#29154)
## Why

The TUI treats both an active turn and MCP startup as a running task.
That currently blocks `/resume` and several settings commands even
though they do not compete with turn execution, which is especially
frustrating when MCP startup is slow.

Model, permissions, personality, and service-tier selections already
update thread settings independently of the running turn. Other clients
can send those updates mid-turn, while the current turn continues with
its captured settings. Allowing the same updates from local slash
commands makes the TUI consistent with that existing behavior.

## What changed

- Allow `/resume` while a task is running.
- Allow `/model`, `/permissions`, `/personality`, and service-tier
commands such as `/fast` while a task is running.
- Keep the existing behavior where the active turn uses its captured
settings and updates apply to subsequent turns.
- Exercise the commands under the busy state in the existing TUI tests
and retain coverage for commands that should remain blocked.

## Behavior note

Turn settings such as model selection and reasoning effort are captured
when a turn starts. Changing them during an active turn affects the next
turn, not the turn already in progress. The status bar updates
immediately, so it may temporarily display the newly selected setting
before that setting is actually in effect.

## Verification

- Focused `codex-tui` tests for resume dispatch, settings popups,
`/fast`, and disabled-command behavior.

## Related issues

Closes #19015.

Addresses the next-turn-safe model/reasoning switching portion of
#14356; dedicated shortcuts and the proposed depth meter remain out of
scope.
d667082322 ยท 2026-06-19 21:37:01 -07:00
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