Files
codex/codex-rs/app-server/tests
pakrym-oai ef24ef127f [codex] Allow empty turn/start requests (#23409)
## Why

`turn/start` already accepts an input array on the wire, including an
empty array, but core treated empty input as a no-op before the turn
could reach the model. App-server clients need to be able to start a
real turn even when there is no new user message, for example to let the
model proceed from existing thread context.

## What changed

- Removed the `run_turn` early return that skipped empty-input turns
when there was no pending input.
- Kept empty active-turn steering rejected by moving the `steer_input`
empty-input check until after core has determined whether there is an
active regular turn.
- Empty regular turns now refresh `previous_turn_settings` like other
regular turns, so follow-up context injection state advances
consistently.
- Added an app-server v2 integration test proving `turn/start` with
`input: []` emits started/completed notifications, sends one Responses
request, and does not synthesize an empty user message.

## Validation

- `cargo test -p codex-app-server --test all
turn_start_with_empty_input_runs_model_request`
2026-05-19 08:39:45 -07:00
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