# TP-060-mcp-server-channel-and-recover — Status

**Current Step:** Step 3: Verify
**Status:** ✅ Complete
**Last Updated:** 2026-05-16
**Review Level:** 1
**Review Counter:** 3
**Iteration:** 4
**Size:** XS

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### Step 1: Buffer the close channel

**Status:** ✅ Complete

- [x] Change the MCP close channel to a single-slot buffered channel.
- [x] Ensure the close signal is completed when the worker goroutine exits before sending.
- [x] Add focused regression coverage through a minimal private seam showing the close path cannot block if the worker goroutine returns without sending.

### Step 2: Harden `withPanicRecovery`

**Status:** ✅ Complete

- [x] Wrap recovered error panic values with `%w` while keeping `%v` for non-error panic values.
- [x] Log recovered panics through `slog.Default().Error` with the recovery scope and `debug.Stack()` only.
- [x] Add regression coverage for wrapped recovered errors and structured stack logging. Verified with `go test ./internal/mcp`.

### Step 3: Verify

**Status:** ✅ Complete

- [x] Update `CHANGELOG.md` `[Unreleased]` entries for the MCP close-channel and panic-recovery fixes.
- [x] Run `make build`, `make test`, `make test-race`, and `make lint` successfully. Verified in iteration 4; `golangci-lint run ./...` reported 0 issues.

| 2026-05-16 23:32 | Task started | Runtime V2 lane-runner execution |
| 2026-05-16 23:32 | Step 1 started | Buffer the close channel |
| 2026-05-16 23:34 | Review R001 | plan Step 1: UNKNOWN |
| 2026-05-16 23:36 | Review R002 | plan Step 1: APPROVE |

| 2026-05-17 00:31 | Worker iter 1 | done in 3533s, tools: 37 |

| 2026-05-17 01:19 | Worker iter 2 | done in 2915s, tools: 13 |

| 2026-05-17 01:51 | Worker iter 3 | done in 1890s, tools: 11 |
| 2026-05-17 01:51 | Step 3 started | Verify |

| 2026-05-17 01:53 | Worker iter 4 | done in 166s, tools: 25 |
| 2026-05-17 01:53 | Task complete | .DONE created |