<!-- task=m-iop-hot-path-one-shot-execution/04+02,03_preset_model_authorization plan=2 tag=REVIEW_API milestone-task=preset-model -->

# 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=2026-08-02
task=m-iop-hot-path-one-shot-execution/04+02,03_preset_model_authorization, plan=2, tag=REVIEW_API

## Archive Evidence Snapshot

- Current review evidence will be archived as `agent-task/m-iop-hot-path-one-shot-execution/04+02,03_preset_model_authorization/plan_cloud_G07_1.log` and `agent-task/m-iop-hot-path-one-shot-execution/04+02,03_preset_model_authorization/code_review_cloud_G07_1.log`.
- Verdict: FAIL. Findings: 2 Required, 0 Suggested, 0 Nit.
- Required behavior: preserve the external virtual model identity in successful native Anthropic Messages JSON and fragmented SSE responses without changing ordinary non-preset responses, provider error bytes/status, event ordering, or terminal behavior.
- Required contract repair: update both active outer API contracts for virtual-preset discovery/admission, unique selector/all-stage authorization, projected-route credential identity, and external virtual response model identity while retaining ordinary managed-route fail-closed behavior.
- Fresh review evidence: predecessor checks, the focused virtual-preset suite, race suite, vet, gofmt diff, and `git diff --check` passed. A temporary reviewer regression against the native Anthropic driver failed with `response model="served-selector-model", want public virtual model "virtual-public-model"` and was removed after capture.
- Roadmap carryover: milestone task `preset-model`, approved SDD scenario S01. Predecessors remain satisfied by `agent-task/archive/2026/08/m-iop-hot-path-one-shot-execution/02+01_preset_generation/complete.log` and `agent-task/archive/2026/08/m-iop-hot-path-one-shot-execution/03+01_preset_model_config/complete.log`.

## 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/04+02,03_preset_model_authorization/`. 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 — Preserve virtual identity in the native Anthropic relay | [x] |
| REVIEW_API-2 — Synchronize public contracts and close S01 evidence | [x] |

## Implementation Checklist

- [x] Preserve the virtual public model identity in successful native Anthropic Messages JSON and fragmented SSE responses without changing ordinary or error relay semantics.
- [x] Add deterministic native non-stream/stream regressions and synchronize both outer API contracts with the approved virtual-preset behavior.
- [x] Run the focused, race, vet, format, contract-inspection, and diff verification exactly as written.
- [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`.
- [ ] If PASS, write `complete.log` based on `agent-ops/skills/common/code-review/templates/complete-log-template.md` and leave no active `.md` files.
- [ ] If PASS, move active task directory `agent-task/m-iop-hot-path-one-shot-execution/04+02,03_preset_model_authorization/` to `agent-task/archive/YYYY/MM/m-iop-hot-path-one-shot-execution/04+02,03_preset_model_authorization/` and update this checklist at the final archive path.
- [ ] 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`.
- [ ] 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.
- [x] If WARN/FAIL, write the next filesystem state matching code-review verdict and do not write `complete.log`.

## Deviations from Plan

None. The implementation and verification commands match the active plan.

## Key Design Decisions

- The native relay receives a public model ID only for a preset Messages dispatch; Count Tokens and ordinary routes retain the empty-ID raw relay path.
- Successful preset JSON responses are buffered until completion, then only their top-level `model` JSON member is patched. The relay removes the upstream `Content-Length` before writing changed bytes.
- Successful preset SSE responses remain streamed. A line buffer tolerates fragmented BODY frames and patches only `message_start` data at `message.model`, preserving all other bytes, event order, line endings, and terminal handling.
- The two outer contracts now distinguish ordinary projected routes from catalog virtual presets, including unique canonical selector/stage authorization, selector credential authority, and public response identity.

## Reviewer Checkpoints

- Native Anthropic Messages rewrites the public model only for successful virtual-preset responses; Count Tokens, ordinary non-preset responses, and provider errors retain their existing bytes/status semantics.
- Non-stream rewriting handles fragmented JSON and streaming rewriting handles BODY fragmentation around Anthropic `message_start.message.model` without changing unrelated fields, event order, line endings, or exactly-once terminal behavior.
- The managed credential binding continues to use the selector's real projected route id and revisions while the response exposes the requested virtual id.
- Both active outer contracts distinguish ordinary projected-route admission from virtual preset admission and specify unique canonical selector/all-stage binding, fail-closed ambiguity, projected credential identity, and external virtual response identity.
- Existing OpenAI Chat, Anthropic Chat bridge, ordinary managed, and legacy provider routes remain unchanged.

## Verification Results

### REVIEW_API-1 focused verification

```bash
go test -count=1 ./apps/edge/internal/openai -run 'Test(AnthropicNativeVirtualPresetPreservesPublicModelIdentity|AnthropicNative|VirtualPresetModelHandlersPreservePublicIdentity)'
```

_Record actual stdout/stderr and exit status here._

Exit status: `0`

```text
ok  \tiop/apps/edge/internal/openai\t0.041s
```

stderr: empty.

### REVIEW_API-2 contract and focused verification

```bash
go test -count=1 ./apps/edge/internal/openai -run 'Test(AnthropicNativeVirtualPresetPreservesPublicModelIdentity|VirtualPresetModelAuthorizationMatrix)'
rg --sort path -n 'virtual preset|execution preset|projected route|credential|response model' agent-contract/outer/openai-compatible-api.md agent-contract/outer/anthropic-compatible-api.md
```

_Record actual stdout/stderr and exit status here._

Exit status: `0`

```text
ok  \tiop/apps/edge/internal/openai\t0.051s
rg matched the synchronized virtual preset, execution preset, projected route,
credential, and response model rules in both active outer contracts.
```

stderr: empty.

### Final verification

```bash
test -f agent-task/archive/2026/08/m-iop-hot-path-one-shot-execution/02+01_preset_generation/complete.log
test -f agent-task/archive/2026/08/m-iop-hot-path-one-shot-execution/03+01_preset_model_config/complete.log
go test -count=1 ./apps/edge/internal/openai -run 'Test(AnthropicNativeVirtualPresetPreservesPublicModelIdentity|AnthropicNative|VirtualPresetModelHandlersPreservePublicIdentity|VirtualPresetModelAuthorizationMatrix)'
go test -race -count=1 ./packages/go/streamgate ./packages/go/config ./apps/edge/internal/openai ./apps/edge/internal/service
go vet ./apps/edge/internal/openai
gofmt -d apps/edge/internal/openai/anthropic_handler.go apps/edge/internal/openai/anthropic_native.go apps/edge/internal/openai/anthropic_native_test.go
rg --sort path -n 'virtual preset|execution preset|projected route|credential|response model' agent-contract/outer/openai-compatible-api.md agent-contract/outer/anthropic-compatible-api.md
git diff --check
```

_Record actual stdout/stderr and exit status here._

Preflight exit status: `0`

```text
/config/.local/bin/go
go version go1.26.2 linux/arm64
/config/opt/go
```

All final verification commands exited `0`.

```text
test -f predecessor complete.log files: passed (stdout/stderr empty)
ok  \tiop/apps/edge/internal/openai\t0.061s
ok  \tiop/packages/go/streamgate\t2.001s
ok  \tiop/packages/go/config\t1.520s
ok  \tiop/apps/edge/internal/openai\t8.850s
ok  \tiop/apps/edge/internal/service\t6.951s
go vet ./apps/edge/internal/openai: passed (stdout/stderr empty)
gofmt -d touched Go files: passed (stdout/stderr empty)
rg contract inspection: matched synchronized rules in both active outer contracts
git diff --check: passed (stdout/stderr empty)
```

---

> **[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: FAIL
- Dimension Assessment:
  - Correctness: Fail
  - Completeness: Fail
  - Test Coverage: Fail
  - API Contract: Fail
  - Code Quality: Pass
  - Implementation Deviation: Fail
  - Verification Trust: Fail
  - Spec Conformance: Pass
- Findings:
  - Required — `apps/edge/internal/openai/anthropic_native.go:126`: the preset rewrite branch treats `END` as a successful response solely because `responseStatus` defaults to 200, even when no `RESPONSE_START` was received. A focused reviewer regression sent only `END` through the managed native-preset path and failed with `status=200 body="", want 502 provider error`; the temporary regression was removed after capture. This changes the existing terminal behavior that the active plan requires to preserve. Gate successful JSON/SSE finalization on an actual successful response start, retain the existing 502 `provider tunnel ended before a response` path otherwise, and add the missing preset regression.
  - Required — `agent-contract/outer/anthropic-compatible-api.md:70` and `agent-contract/outer/anthropic-compatible-api.md:276`: the synchronized contract says ordinary native routes retain the caller-selected route ID in successful responses, but `anthropic_handler.go:70-74` intentionally passes a rewrite identity only for presets and `TestAnthropicNativeProviderFixturesPreserveBytesAndHeaders` proves ordinary native responses retain the upstream provider model bytes. This contradicts the implementation and the active plan's ordinary-route preservation boundary. Limit the new public-response identity guarantee to authorized virtual presets and retain the existing ordinary native-versus-bridge response semantics.
- Routing Signals:
  - `review_rework_count=3`
  - `evidence_integrity_failure=true`
- Next Step: Invoke the plan skill in `prepare-follow-up` mode with the raw findings and fresh verification evidence, then archive this pair and materialize the freshly routed follow-up pair.
