<!-- task=m-iop-owned-single-request-agent-execution/23+22_error_cancel plan=6 tag=REVIEW_API milestone-task=error-cancel -->

# Complete - m-iop-owned-single-request-agent-execution/23+22_error_cancel

## Completed At

2026-08-07

## Summary

Completed the S11 error/cancel terminal-ownership task after five verdict-bearing review loops; final verdict: PASS.

## Loop History

| Plan | Review | Verdict | Notes |
|------|--------|---------|-------|
| `plan_cloud_G10_2.log` | `code_review_cloud_G10_2.log` | FAIL | Required fixes for authoritative cancellation, upstream status classification, and request wall-clock ownership. |
| `plan_cloud_G10_3.log` | `code_review_cloud_G10_3.log` | FAIL | Required parent-first classification for child tool and artifact deadline races. |
| `plan_cloud_G10_4.log` | `code_review_cloud_G10_4.log` | FAIL | Required request-first classification during late internal-tool admission. |
| `plan_cloud_G08_5.log` | `code_review_cloud_G08_5.log` | FAIL | Required preservation of caller cancellation during late internal-tool admission. |
| `plan_cloud_G08_6.log` | `code_review_cloud_G08_6.log` | PASS | Cancellation now owns the late-admission terminal while request-first budget and genuine stage-first timeout behavior remain intact. |

## Implementation and Cleanup

- Routed a late internal-tool admission cancel class through the coordinator's `cancelLocked` owner before malformed or generic failure handling.
- Added deterministic coverage for an already-cancelled caller with a live request deadline and expired stage deadline, including cancelled state, exactly one cancelled terminal, and no pending tool dispatch.
- Preserved request wall-clock budget ownership, genuinely earlier stage timeout behavior, in-flight tool cancellation, the closed Anthropic terminal contract, and the unchanged Edge-Node protobuf wire.

## Final Verification

- `test -f agent-task/m-iop-owned-single-request-agent-execution/23+22_error_cancel/code_review_cloud_G08_5.log && test -f agent-task/archive/2026/08/m-iop-owned-single-request-agent-execution/22+21_executor_activation/complete.log && rg -n 'Overall Verdict: FAIL|Required R1|review_rework_count=4|evidence_integrity_failure=false' agent-task/m-iop-owned-single-request-agent-execution/23+22_error_cancel/code_review_cloud_G08_5.log` - PASS; prior FAIL, Required R1, routing signals, and predecessor evidence were present.
- `go test -race ./apps/edge/internal/service -run '^(TestSingleRequestLateInternalToolAdmissionCallerCancellation|TestPrepareInternalWorkspaceToolDeadlineOwnership)$' -count=20` - PASS; `ok iop/apps/edge/internal/service`.
- `go test -race ./apps/edge/internal/service -run '^(TestSingleRequestInternalToolLoopCancelPropagates|TestSingleRequest(InternalTool|Artifact)RequestWallClockBudgetOwnership|TestSingleRequestObservationDeadlineClassifications)$' -count=10` - PASS; `ok iop/apps/edge/internal/service`.
- `go test -race ./apps/edge/internal/service ./apps/edge/internal/openai -run 'Test(SingleRequestTerminalDisposition|SingleRequestQualityGate|SingleRequestExecutor(Cancellation|StageFailures|TerminalWaiterCleanup|ParentContextOwnership|RequestBudgetOwnership)|AnthropicSingleRequestErrorCancelMatrix|SingleRequestAnthropicStreamTerminalDisposition|AnthropicSingleRequestLiveContextProviderCancellationBuffered|SingleRequestAnthropicStreamLiveContextProviderCancellation)' -count=1` - PASS; both packages passed.
- `go vet ./apps/edge/internal/service ./apps/edge/internal/openai && go test ./apps/edge/... -count=1` - PASS; vet and all Edge packages passed.
- `go test -race -count=1 ./packages/go/config ./packages/go/streamgate ./apps/edge/internal/openai ./apps/edge/internal/service ./apps/node/internal/node ./apps/node/internal/transport ./apps/node/internal/workspace` - PASS; every approved SDD package passed under the race detector.
- `b_before=$(sha256sum proto/gen/iop/runtime.pb.go) && make proto && b_after=$(sha256sum proto/gen/iop/runtime.pb.go) && test "$b_before" = "$b_after" && printf '%s\n' "$b_after"` - PASS; generated protobuf hash remained `5c9d6c580ecf9c9fba857787b5d2757757d7289b267b44074bf6c2108b4cc1a9`.
- `rg --sort path -n 'caller disconnect|request wall-clock|error-cancel|S11' agent-contract/outer/anthropic-compatible-api.md agent-spec/runtime/edge-node-execution.md agent-spec/input/openai-compatible-surface.md && rg --sort path -n 'prepareInternalWorkspaceToolLocked|classifyChildOperationContext|singleRequestErrorClassCancel|cancelLocked|requestDeadline|singleRequestErrorClassInternalToolBudget|singleRequestErrorClassTimeout' apps/edge/internal/service --glob '*.go'` - PASS; contract/spec and all cancellation/deadline owners were found deterministically.
- `git diff --check` - PASS; no whitespace errors.

## Remaining Nits

- None.

## Follow-up Work

- None. External Claude/Mac qualification remains independently owned by SDD S12 `claude-smoke` and was not part of this task.
