<!-- task=m-iop-owned-single-request-agent-execution/06+05_stream_terminal plan=3 tag=REVIEW_API milestone-task=stream-terminal -->

# Complete - m-iop-owned-single-request-agent-execution/06+05_stream_terminal

## Completion Time

2026-08-06

## Summary

PASS after one reviewed rework: the marked Anthropic SSE projector now treats a failed terminal flush as a failed endpoint commit and never acknowledges coordinator completion from that failure.

## Loop History

| Plan | Review | Verdict | Notes |
|------|--------|---------|-------|
| `plan_cloud_G09_2.log` | `code_review_cloud_G10_2.log` | FAIL | Required R1 identified error-blind terminal flushing and a false successful acknowledgement. |
| `plan_cloud_G07_3.log` | `code_review_cloud_G07_3.log` | PASS | Projector-local error-reporting flush and the deterministic terminal flush-failure regression passed review. |

## Implementation and Cleanup

- Routed every marked-projector SSE event through `http.NewResponseController(...).Flush()` while preserving the generic Anthropic/Hot Path helper.
- Added a deterministic `message_stop` `FlushError` regression that proves the pump returns the wire error and the execution ends `failed`, not `completed`.
- Preserved serialized terminal ownership, exact-wire privacy, event ordering, ping shutdown, and post-terminal no-op behavior.

## Final Verification

- `test -f agent-task/m-iop-owned-single-request-agent-execution/05+03_single_ingress/complete.log || test "$(compgen -G 'agent-task/archive/*/*/m-iop-owned-single-request-agent-execution/05+03_single_ingress/complete.log' | wc -l)" -eq 1` - PASS; the required predecessor evidence is uniquely available.
- `go test -race ./apps/edge/internal/openai -run '^TestSingleRequestAnthropicStreamTerminalFlushFailureDoesNotComplete$' -count=1` - PASS; `ok iop/apps/edge/internal/openai 1.042s`.
- `go test -race ./apps/edge/internal/openai -run 'TestSingleRequestAnthropicStream' -count=1` - PASS; `ok iop/apps/edge/internal/openai 1.071s`.
- `go test ./apps/edge/internal/openai -run 'Test(AnthropicSingleRequestStreaming|AnthropicSingleRequestStream|HotPathAnthropic)' -count=1` - PASS; `ok iop/apps/edge/internal/openai 0.047s`.
- `go test -race ./apps/edge/internal/openai -count=1` - PASS; `ok iop/apps/edge/internal/openai 11.643s`.
- `go vet ./apps/edge/...` - PASS; exit status 0.
- `go test ./apps/edge/... ./packages/go/streamgate/... -count=1` - PASS; all Edge and streamgate packages passed.
- `git diff --check` - PASS; exit status 0.
- `gofmt -d apps/edge/internal/openai/single_request_anthropic_stream.go apps/edge/internal/openai/single_request_anthropic_stream_test.go` - PASS; no output.

## Residual Nits

- None.

## Follow-up Work

- None.
