<!-- task=m-iop-owned-single-request-agent-execution/02+01_preset_binding plan=4 tag=REVIEW_REVIEW_API milestone-task=preset-binding -->

# Complete - m-iop-owned-single-request-agent-execution/02+01_preset_binding

## Completion Date

2026-08-06

## Summary

Completed the immutable fixed-light preset binding boundary after five plan snapshots and three verdict-bearing review loops; final verdict PASS.

## Loop History

| Plan | Review | Verdict | Notes |
|------|--------|---------|-------|
| `plan_local_G06_0.log` | `code_review_cloud_G07_0.log` | Not reviewed | Initial pair was superseded before implementation evidence or a verdict. |
| `plan_local_G06_1.log` | `code_review_cloud_G07_1.log` | Not reviewed | Parent work was refined into the current split packet before implementation evidence or a verdict. |
| `plan_local_G06_2.log` | `code_review_cloud_G07_2.log` | FAIL | Production resolvers swallowed marked-preset compilation failures, fixed stage options were discarded, and nested option values were shallow-copied. |
| `plan_cloud_G07_3.log` | `code_review_cloud_G07_3.log` | FAIL | The validator still admitted extra route keys and misclassified non-leading duplicate stage roles. |
| `plan_cloud_G05_4.log` | `code_review_cloud_G05_4.log` | PASS | Exact route cardinality, duplicate-first typed rejection, and managed no-fallback regressions closed the remaining finding. |

## Implementation and Cleanup

- Enforced exactly one `light` route for marked fixed single-request presets.
- Scanned all fixed stage roles for duplicates before positional role/model/options validation so plan, work, and review duplicates consistently return the typed duplicate error.
- Added focused typed-error tests and managed model-discovery/resolver regressions for extra-route and duplicate-role variants.

## Final Verification

- `test -f agent-task/m-iop-owned-single-request-agent-execution/01_preset_config/complete.log || test "$(compgen -G 'agent-task/archive/*/*/m-iop-owned-single-request-agent-execution/01_preset_config/complete.log' | wc -l)" -eq 1` - PASS; the unique archived packet 01 completion evidence was found.
- `test -z "$(gofmt -l apps/edge/internal/openai/single_request_preset_binding.go apps/edge/internal/openai/single_request_preset_binding_test.go apps/edge/internal/openai/principal_routes_test.go)"` - PASS; no unformatted path was reported.
- `go test ./apps/edge/internal/openai -run 'Test(SingleRequestPresetBindingRejectsInvalidDefenseInDepth|ManagedSingleRequestPresetFailsClosed)' -count=1` - PASS; `ok iop/apps/edge/internal/openai`.
- `go test ./apps/edge/internal/service ./apps/edge/internal/openai -count=1` - PASS; both packages passed without cached results.
- `go test -race -count=1 ./apps/edge/internal/openai ./apps/edge/internal/service` - PASS; both packages passed under the race detector.
- `go vet ./apps/edge/...` - PASS; no diagnostics.
- `go test ./apps/edge/... -count=1` - PASS; every Edge package passed without cached results.
- `git diff --check` - PASS; no whitespace errors.

## Remaining Nits

- None.

## Follow-up Work

- None.
