Owen Lin 8e44ad94b0 Add coordinated shutdown for local agent trees (#49814) ...

## What changed

Expose `ThreadManager::request_agent_tree_shutdown` and an `AgentTreeShutdown::wait` handle. Requests reject new starts in the shared runtime, cancel pending startup, and signal every session in that tree, including delegates outside the thread registry. Waiting covers admitted operations and session teardown, and reports cleanup or persistence writer failures. Other root trees remain unaffected; registry removal and persistence handoff remain caller responsibilities.

Retain tree membership through startup, cancelled spawn cleanup, residency eviction, and completion watchers. Release persistence resources before returning startup failures, and stop completion watchers during tree shutdown without reporting shutdown as a child result.

## Testing

Add coverage for tree isolation, children removed from the registry, delegate teardown, cancellation during required MCP initialization, aborted teardown, persistence writer failures, and successful retry after a failed resume releases its writer.

GitOrigin-RevId: a109e25adf23d20baf7595891099947050c6b6b5

2026-10-01 01:57:56 +00:00

..

common

Add an opt-in model catalog to multi-agent context (#49560)

2026-09-30 10:03:09 +00:00

remote_env_windows

Apply remote platform semantics to exec safety checks (#42113)

2026-09-01 18:24:56 +00:00

suite

Add coordinated shutdown for local agent trees (#49814)

2026-10-01 01:57:56 +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

Preserve tool metadata for OpenAI provider endpoint overrides (#48344)

2026-09-26 03:49:14 +00:00