[Maximooch]

Change

The pinned SDK does not dispatch $/cancel_request. Track live prompt RPC IDs and cancel only the associated running or queued turn; stale IDs cannot abort later work in the same session. Use the official PromptRequest validator in a scoped transport handler while other normal RPC routes remain in the SDK. Keep session/cancel semantics intact and reject duplicate live request IDs.

Depends on #150 (feat/acp-context-usage); no PRs merged. Request cancellation targets prompts only. Short configuration operations and session setup are not interruptible; deletion is not partly cancelled.

Validation

16 real-CLI/wire/child/question tests pass on Windows Python 3.11. Raw stdio test independently numbers RPCs, cancels a queued turn while another session runs, cancels the running turn, and verifies stale cancel plus later continuation. Scoped Ruff and diff checks pass. Dedicated ACP CI includes the new test.

[vercel]

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Project	Deployment	Actions	Updated
penguin	Ready	Preview	Oct 28, 2026 5:51am UTC

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[Maximooch]

Integrated with preserved commit history through #161 (main commit abd8a66). Closing this stacked review after verifying its current head is an ancestor of main.