<!-- task=m-iop-hot-path-one-shot-execution/11+09,10_cleanup plan=4 tag=REVIEW_REVIEW_REVIEW_REVIEW_API milestone-task=cleanup -->

# Complete - m-iop-hot-path-one-shot-execution/11+09,10_cleanup

## Completed At

2026-08-03

## Summary

Completed the fifth review loop with PASS after restoring the fail-closed boundary for empty workspace receipts while preserving cleanup for exact operation failures.

## Loop History

| Plan | Review | Verdict | Notes |
|------|--------|---------|-------|
| `plan_cloud_G09_0.log` | `code_review_cloud_G10_0.log` | FAIL | Required cleanup state and race ownership gaps were routed to follow-up. |
| `plan_cloud_G10_1.log` | `code_review_cloud_G10_1.log` | FAIL | Required primary-error cleanup behavior remained incomplete. |
| `plan_cloud_G09_2.log` | `code_review_cloud_G09_2.log` | FAIL | Local/review primary errors did not consistently enter cleanup. |
| `plan_cloud_G07_3.log` | `code_review_cloud_G08_3.log` | FAIL | Empty success receipts were incorrectly classified as exact cleanup-authorizing outcomes. |
| `plan_cloud_G05_4.log` | `code_review_cloud_G06_4.log` | PASS | Empty and whitespace-only success receipts fail closed on OpenAI and Anthropic while exact failures retain cleanup. |

## Implementation and Cleanup

- Classified an explicit failure status as exact without allowing an empty success-status body to authorize cleanup.
- Added focused exactness cases for empty, whitespace, explicit failure, matcher failure, malformed/trailing JSON, and valid success receipts.
- Added OpenAI and Anthropic handler regressions asserting HTTP 400, no `delete_file` frontier, and two selector calls for an empty pair receipt.
- Preserved the `{"written":false}` primary-error cleanup path and original endpoint error precedence.

## Final Verification

- `go test -count=1 ./apps/edge/internal/openai -run '^TestWorkspace(ResultExactness|BindingReceipts)$'` - PASS; `ok iop/apps/edge/internal/openai`.
- `go test -count=1 ./apps/edge/internal/openai -run '^Test(ArtifactPairFailureCleanupKeepsMalformedFailClosed|HotPathCleanupPrimaryErrorPrecedence)$'` - PASS; `ok iop/apps/edge/internal/openai`.
- `go test -race -count=1 ./apps/edge/internal/openai -run '^Test(ArtifactPairFailureCleanupKeepsMalformedFailClosed|HotPathCleanupPrimaryError|LogicalRequestTTL)$'` - PASS; `ok iop/apps/edge/internal/openai`.
- `go test -race -count=1 ./packages/go/streamgate ./packages/go/config ./apps/edge/internal/openai ./apps/edge/internal/service` - PASS; all four packages passed with the race detector.
- `edge_test_tmpdir="$(mktemp -d /config/workspace/iop-edge-test.XXXXXX)"; chmod 700 "$edge_test_tmpdir"; TMPDIR="$edge_test_tmpdir" go test -count=1 ./apps/edge/...` - PASS; every Edge package passed and the temporary directory was removed after the command.
- `go vet ./apps/edge/...` - PASS; no output.
- `gofmt -d apps/edge/internal/openai/workspace_tool_codec.go apps/edge/internal/openai/workspace_tool_binding_test.go apps/edge/internal/openai/artifact_pair_test.go` - PASS; no output.
- `git diff --check` - PASS; no output.
- Credentialed provider, real workspace deletion, and external-runner smoke were not run because they are excluded from this deterministic cleanup subtask; the separate S16 `hot-smoke` milestone task owns live-provider evidence.

## Remaining Nits

- None.

## Follow-up Work

- None.
