<!-- task=m-iop-hot-path-one-shot-execution/09+06,08_artifact_pair plan=2 tag=REVIEW_API milestone-task=artifact-pair -->

# Code Review Reference - REVIEW_API

> **[IMPLEMENTING AGENT — READ FIRST] Filling in this file is the mandatory final step of implementation.**
> The task is NOT complete until every implementation-owned section below is filled in.
> Complete the `Implementation Checklist`; the final checklist item is mandatory before saving.
> Fill implementation-owned sections, then stop with active files in place and report ready for review.
> If implementation is blocked, record the exact blocker, attempted commands/output, and resume condition only in implementation-owned evidence fields.
> Do not ask the user directly, present choices, call user-input tools, create control-plane stop files, or classify the next state.
> Finalization (`Code Review Result`, log rename, `complete.log`, archive moves, `Review-Only Checklist`) is review-agent-only, even after compaction/resume.
> Follow the ownership table at the bottom of this file for which sections you own.

## Overview

date=2026-08-03
task=m-iop-hot-path-one-shot-execution/09+06,08_artifact_pair, plan=2, tag=REVIEW_API

## Archive Evidence Snapshot

- Prior artifacts after review finalization: `agent-task/m-iop-hot-path-one-shot-execution/09+06,08_artifact_pair/plan_cloud_G09_1.log` and `agent-task/m-iop-hot-path-one-shot-execution/09+06,08_artifact_pair/code_review_cloud_G09_1.log`.
- Prior verdict: FAIL with 2 Required, 0 Suggested, and 0 Nit findings; `review_rework_count=2` and `evidence_integrity_failure=false`.
- Required findings: consume a typed artifact disposition at the Chat/Messages handler boundary so prepare alone resumes the selector, pair success reaches a no-selector local-stage handoff, and `pair_ready` cannot downgrade to direct; release the pinned artifact record when a no-tool direct turn completes successfully.
- Affected files: `apps/edge/internal/openai/artifact_pair.go`, `apps/edge/internal/openai/request_identity_ingress.go`, `apps/edge/internal/openai/chat_handler.go`, `apps/edge/internal/openai/anthropic_handler.go`, `apps/edge/internal/openai/hot_path_dispatch.go`, `apps/edge/internal/openai/hot_path_direct.go`, `apps/edge/internal/openai/artifact_pair_test.go`, and `apps/edge/internal/openai/hot_path_direct_test.go`.
- Fresh review evidence: predecessor checks, the named artifact test, focused and shared `-race -count=1` suites, `go vet`, `gofmt -d`, and `git diff --check` all passed. Static call-site tracing proved `iop_artifact_disposition` and `iop_artifact_local_eligible` have no production reader, while Chat and Messages call `SubmitProviderPool` unconditionally; direct-terminal tracing proved the artifact record is not removed on successful no-tool direct completion.
- Roadmap carryover: approved SDD scenario S06 and Evidence Map row `artifact-pair` remain the sole scope. Actual local/review model execution belongs to later milestone children, so this child must expose a typed fail-closed local-stage handoff without starting that worker.

## For the Review Agent

> **[REVIEW AGENT ONLY]** The finalization steps below are review-agent only. Implementing agents must not execute this section.

Compare implementation of each item against source files and verify that output in `Verification Results` matches code.
Review completion means the following steps are finished:

1. Append verdict and `review_rework_count` / `evidence_integrity_failure` routing signals.
2. Archive `CODE_REVIEW-cloud-G08.md` → `code_review_cloud_G08_2.log` and `PLAN-cloud-G08.md` → `plan_cloud_G08_2.log`.
3. If PASS, write `complete.log` and move active task directory to `agent-task/archive/YYYY/MM/m-iop-hot-path-one-shot-execution/09+06,08_artifact_pair/`. If WARN/FAIL, fully write the next filesystem state required by the code-review skill.
4. If PASS and task group is `m-<milestone-slug>`, preserve the first-line `milestone-task` metadata in `complete.log` and report it for the runtime aggregation event. Roadmap state evaluation belongs to `sync-milestone-workstate`.
5. Check applicable `Review-Only Checklist` items at the final `.log` location before reporting.

---

## Implementation Item Completion

| Item | Status |
|------|---------|
| REVIEW_API-1 Consume artifact dispositions at the public handler boundary | [x] |
| REVIEW_API-2 Release artifact state on successful direct completion | [x] |

## Implementation Checklist

- [x] Implement REVIEW_API-1 so the real Chat and Messages handlers consume typed prepare/local dispositions and enforce pair-only post-prepare output.
- [x] Implement REVIEW_API-2 so successful no-tool direct completion releases its pinned artifact frontier and bounded capacity remains reusable.
- [x] Fill implementation-owned sections in CODE_REVIEW-*-G??.md with actual implementation notes and verification output.

## Review-Only Checklist

> **[REVIEW AGENT ONLY]** This checklist is used only by the review agent.
> Implementing agents must not modify or check this section.

- [x] Append one verdict of `PASS`, `WARN`, or `FAIL` and verified `review_rework_count`, `evidence_integrity_failure` to `Code Review Result`.
- [x] Verify that verdict, `Dimension Assessment`, and Required/Suggested/Nit classifications match.
- [x] Archive active `CODE_REVIEW-*-G??.md` to `code_review_cloud_G08_2.log`.
- [x] Archive active `PLAN-*-G??.md` to `plan_cloud_G08_2.log`.
- [x] Verify that the Agent-Ops managed block in `.gitignore` unignores `agent-task/**/*.md` and `agent-task/**/*.log` and ignores `agent-roadmap/current.md`.
- [x] If PASS, write `complete.log` based on `agent-ops/skills/common/code-review/templates/complete-log-template.md` and leave no active `.md` files.
- [x] If PASS, move active task directory `agent-task/m-iop-hot-path-one-shot-execution/09+06,08_artifact_pair/` to `agent-task/archive/YYYY/MM/m-iop-hot-path-one-shot-execution/09+06,08_artifact_pair/` and update this checklist at the final archive path.
- [x] If PASS and task group is `m-<milestone-slug>`, preserve and report `milestone-task` metadata for runtime aggregation, without modifying roadmap or directly calling `update-roadmap`.
- [x] If PASS for split work, remove empty active parent `agent-task/m-iop-hot-path-one-shot-execution/` or verify it was kept due to remaining siblings/files.
- [ ] If WARN/FAIL, write the next filesystem state matching code-review verdict and do not write `complete.log`.

## Deviations from Plan

None.

## Key Design Decisions

- `joinPresetChatIngress` and `joinPresetAnthropicIngress` now return `presetIngressResult`; trusted metadata retains only logical request, call, and stage identifiers.
- The public Chat and Messages handlers branch on `local_eligible` before provider-pool submission and use an endpoint-native 501 handoff that preserves the local-eligible frontier for the later local-stage owner.
- The artifact store exposes a lock-safe `pairRequired` guard, so `pair_ready` rejects any selector result other than `light` before direct execution.
- Successful no-tool direct completion uses `terminalPresetRequest`, releasing the artifact record with its logical request. Tool-waiting direct turns retain their frontier.

## Reviewer Checkpoints

- The real Chat and Messages handlers consume an explicit artifact disposition; they do not rely on metadata that no downstream component reads.
- Prepare success submits exactly one next selector turn on the retained stage, while pair success submits no selector/provider call and reaches the typed fail-closed local-stage handoff.
- A request in `pair_ready` cannot be reclassified or emitted as direct; only the exact Plan/Review pair can advance local eligibility.
- General continuations and direct turns that issued ordinary caller tools retain their existing waiting behavior.
- A successful no-tool direct completion removes both logical-request and artifact-frontier state, so sequential traffic beyond the bounded store capacity remains admissible.
- Chat/Messages regressions run through public routes with deterministic fakes and prove service-call counts, endpoint-native errors, replay safety, and no external/local/workspace execution.

## Verification Results

### Dependency and named-test preflight

```bash
test -f agent-task/m-iop-hot-path-one-shot-execution/06+04,05_request_identity_ingress/complete.log || test -f agent-task/archive/2026/08/m-iop-hot-path-one-shot-execution/06+04,05_request_identity_ingress/complete.log
test -f agent-task/m-iop-hot-path-one-shot-execution/08+02,04,06_workspace_binding/complete.log || test -f agent-task/archive/2026/08/m-iop-hot-path-one-shot-execution/08+02,04,06_workspace_binding/complete.log
go test ./apps/edge/internal/openai -list 'Test(ArtifactPairHandlerDisposition|DirectTurnReleasesArtifactFrontier)' | rg 'Test(ArtifactPairHandlerDisposition|DirectTurnReleasesArtifactFrontier)'
```

_Actual stdout/stderr:_

```text
TestDirectTurnReleasesArtifactFrontier
TestArtifactPairHandlerDisposition
```

### Focused artifact and direct lifecycle race verification

```bash
go test -race -count=1 ./apps/edge/internal/openai -run 'Test(Workspace|ArtifactPair|DirectTurnReleasesArtifactFrontier)'
```

_Actual stdout/stderr:_

```text
ok  	iop/apps/edge/internal/openai	1.498s
```

### Shared package race verification

```bash
go test -race -count=1 ./packages/go/streamgate ./apps/edge/internal/openai ./apps/edge/internal/service
```

_Actual stdout/stderr:_

```text
ok  	iop/packages/go/streamgate	2.109s
ok  	iop/apps/edge/internal/openai	9.545s
ok  	iop/apps/edge/internal/service	7.030s
```

### Vet, formatting, and diff verification

```bash
go vet ./apps/edge/internal/openai
gofmt -d apps/edge/internal/openai/artifact_pair.go apps/edge/internal/openai/artifact_pair_test.go apps/edge/internal/openai/request_identity_ingress.go apps/edge/internal/openai/chat_handler.go apps/edge/internal/openai/anthropic_handler.go apps/edge/internal/openai/hot_path_dispatch.go apps/edge/internal/openai/hot_path_direct.go apps/edge/internal/openai/hot_path_direct_test.go
git diff --check
```

_Actual stdout/stderr:_

```text
(no stdout/stderr; all commands exited 0)
```

---

> **[IMPLEMENTING AGENT — BEFORE SAVING] Have you filled in every implementation-owned section?**
> If anything is blank, go back and fill it in before saving this file.
> Leave review-agent-only sections unchanged.

## Section Ownership

| Section | Owner | Note |
|---------|-------|------|
| Header comment, Overview, Review Agent Instructions | Fixed at stub creation | Implementing agent must not modify or execute these (archive, complete.log, and task-directory archive move are review-agent only) |
| Archive Evidence Snapshot | Fixed at stub creation from plan when present | Implementing agent uses it as default prior-loop context; read only the specific archive files cited there when more detail is required |
| Implementation Item Completion (item names) | Fixed at stub creation | Implementing agent checks `[ ]` → `[x]` only |
| Implementation Checklist (item text/order) | Fixed at stub creation from plan | Implementing agent checks `[ ]` → `[x]` only |
| Review-Only Checklist | Review agent only | Implementing agent must not modify or check this section |
| Deviations from Plan, Key Design Decisions | Implementing agent | Replace placeholder text with actual content |
| Reviewer Checkpoints | Fixed at stub creation | Pre-filled from plan |
| Verification Results (section headings + commands) | Fixed at stub creation | Implementing agent fills in command output only; command changes require a `Deviations from Plan` entry |
| Code Review Result | Review agent appends | Not included in stub |

## Code Review Result

- Overall Verdict: PASS
- Dimension Assessment:
  - Correctness: Pass — the public Chat and Messages handlers consume the typed artifact disposition before provider-pool submission, prepare resumes the retained selector stage, exact pair success reaches the no-selector local-stage handoff, and `pair_ready` rejects a direct downgrade.
  - Completeness: Pass — both requested lifecycle fixes are implemented: successful no-tool direct completion releases the logical request and artifact frontier, while ordinary tool-waiting direct turns retain their state.
  - Test Coverage: Pass — handler-level Chat/Messages regressions assert exact selector submission counts and endpoint-native handoff errors; the direct lifecycle regression proves bounded-capacity reuse and retained tool-waiting state.
  - API Contract: Pass — the implementation preserves endpoint-native OpenAI and Anthropic error envelopes, keeps the virtual model boundary, and performs no provider, local-model, or workspace execution after pair success.
  - Code Quality: Pass — the control decision is typed, the artifact phase query is lock-safe, terminal cleanup is centralized, and no stale metadata-only signal, debug output, dead code, or task-local TODO remains.
  - Implementation Deviation: Pass — the implementation and verification match both REVIEW_API items and the declared file scope; no behavior-changing deviation was recorded.
  - Verification Trust: Pass — predecessor checks, named regressions, focused and shared uncached race suites, vet, formatting, and diff checks were rerun successfully by the reviewer.
  - Spec Conformance: Pass — the implementation and deterministic evidence satisfy SDD S06 and the `artifact-pair` Evidence Map for typed prepare/pair progression, exact receipt gating, replay safety, and local-stage eligibility.
- Findings: None.
- Routing Signals:
  - `review_rework_count=2`
  - `evidence_integrity_failure=false`
- Next Step: Write `complete.log`, archive the active pair and task directory, and report the milestone completion event metadata for runtime aggregation.
