# Plan Review — TP-060 Step 1

Verdict: **Approved**

The revised Step 1 plan addresses the issue raised in R001: it no longer treats buffering alone as sufficient, and it explicitly includes completing the close signal when the worker goroutine exits before sending. The planned private seam for focused regression coverage is appropriate for this XS change and avoids forcing a broad transport refactor.

## Notes for implementation

- Keep the required single-slot buffer: `closed := make(chan error, 1)`.
- Make the worker goroutine the only owner that sends/closes the channel. A typical safe shape is to defer `close(closed)` inside that goroutine and send the `Wait()` result when available; this allows the cancel path's receive to finish even if a future branch returns before sending.
- The regression test should exercise the private seam directly and use a short timeout only as a guard against hangs, not as the main synchronization mechanism.
- Keep Step 1 scoped to the close-channel behavior; panic wrapping/logging belongs in Step 2.
