Ahmed Ibrahim d7e8f4c3dc Preserve user input when MCP startup is interrupted (#34839) ...

## Why

Interrupting a turn while MCP tools were still starting could abort before the
submitted user input was recorded in conversation history.

## What changed

- Build and retain the MCP tool list and tool router as part of each step
  snapshot, using the turn cancellation token during tool discovery.
- Record turn hooks and submitted input when cancellation occurs during startup
  prewarming, pre-sampling compaction, or first-step capture.
- Reuse the captured router for sampling, compaction, and prompt debugging so
  advertised and executable tools share the same request-scoped view.

## Testing

Add coverage that interrupts each affected MCP startup phase and verifies that
the user prompt remains in history before the turn-aborted marker.

GitOrigin-RevId: 6e96c6814357a55545d69b580e28f35933cfadf7

2026-07-22 22:50:13 +00:00

..

common

Consolidate thread startup around StartThreadOptions (#34814)

2026-07-22 19:31:54 +00:00

remote_env_windows

Scope runtime workspace roots to execution environments (#32952)

2026-07-14 04:41:08 +00:00

suite

Preserve user input when MCP startup is interrupted (#34839)

2026-07-22 22:50:13 +00:00

all.rs

[codex] Use expect in integration tests (#28441)

2026-06-15 21:53:47 -07:00

responses_headers.rs

Always assign response item IDs (#34645)

2026-07-22 01:23:44 +00:00