Owen Lin b7ba02f880 Support store-owned preparation when resuming threads (#54059) ...

## Why

Thread stores need a way to reuse history and writer state loaded while preparing a resume, rather than loading them again during session startup.

## What changed

- Add an opaque, single-use `ThreadStoreResumePreparation` and an optional preparation in `StartThreadOptions`.
- Pass preparation through session startup to `ThreadStore::resume_thread_with_preparation`, which defaults to an unsupported-operation error.
- Reject preparation for ephemeral threads or threads without resumed history. Continue using `resume_thread` when no preparation is supplied.

## Testing

Add a regression test verifying that supplied preparation selects the prepared store path and propagates its unsupported-operation error instead of falling back to ordinary resume.

GitOrigin-RevId: 26537d9b83443bd56341d6afc713f32b999dc67c

2026-10-14 18:02:25 +00:00

..

common

Keep discovered Apps tools available during startup recovery (#53672)

2026-10-13 13:59:41 +00:00

remote_env_windows

Bind capability roots to environment selections (#51493)

2026-10-06 22:39:32 +00:00

suite

Support store-owned preparation when resuming threads (#54059)

2026-10-14 18:02:25 +00:00

all.rs

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

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

mcp_trace_propagation.rs

Preserve MCP request trace context across transport workers (#47212)

2026-09-22 06:47:07 +00:00

responses_headers.rs

Add opt-in output token replay for OpenAI requests (#52742)

2026-10-10 01:25:00 +00:00

windows_sandbox.rs

Move Windows sandbox tests into a dedicated integration binary (#51678)

2026-10-07 12:47:04 +00:00