## Verification Report

**Change**: rook-591-chat-completions-idempotency  
**Date**: 2026-04-22

---

### Completeness

| Metric | Value |
|--------|-------|
| Tasks total | 10 |
| Tasks complete | 10 |
| Tasks incomplete | 0 |

All tasks in `openspec/changes/rook-591-chat-completions-idempotency/tasks.md` are complete.

---

### Test Evidence

Build was intentionally not run because the user explicitly required: **Do not build the project.**

#### Targeted verification commands executed

1. `cargo test --manifest-path "clients/rook/Cargo.toml" canonical_json_`
   - Result: **3 passed / 0 failed**
2. `cargo test --manifest-path "clients/rook/Cargo.toml" services::idempotency::tests::reserve_chat_completion_returns_reserved_new_for_new_scope -- --exact`
   - Result: **1 passed / 0 failed**
3. `cargo test --manifest-path "clients/rook/Cargo.toml" services::idempotency::tests::reserve_chat_completion_replays_completed_response_for_equivalent_request -- --exact`
   - Result: **1 passed / 0 failed**
4. `cargo test --manifest-path "clients/rook/Cargo.toml" services::idempotency::tests::reserve_chat_completion_rejects_in_progress_replay_and_mismatch_and_allows_expiry -- --exact`
   - Result: **1 passed / 0 failed**
5. `cargo test --manifest-path "clients/rook/Cargo.toml" services::idempotency::tests::reserve_chat_completion_scopes_same_raw_key_by_principal -- --exact`
   - Result: **1 passed / 0 failed**
6. `cargo test --manifest-path "clients/rook/Cargo.toml" server::tests::chat_idempotency_is_route_local_and_does_not_touch_models_or_admin_routes -- --exact`
   - Result: **1 passed / 0 failed**
7. `cargo test --manifest-path "clients/rook/Cargo.toml" server::tests::chat_idempotency_replays_completed_response_without_second_upstream_call -- --exact`
   - Result: **1 passed / 0 failed**
8. `cargo test --manifest-path "clients/rook/Cargo.toml" server::tests::chat_idempotency_rejects_in_progress_and_mismatched_replays -- --exact`
   - Result: **1 passed / 0 failed**
9. `cargo test --manifest-path "clients/rook/Cargo.toml" server::tests::chat_idempotency_fails_closed_when_storage_is_unavailable -- --exact`
   - Result: **1 passed / 0 failed**
10. `cargo test --manifest-path "clients/rook/Cargo.toml" server::tests::chat_idempotency_missing_key_does_not_enable_replay_protection -- --exact`
    - Result: **1 passed / 0 failed**
11. `cargo test --manifest-path "clients/rook/Cargo.toml" server::tests::chat_idempotency_replays_completed_terminal_error_response -- --exact`
    - Result: **1 passed / 0 failed**
12. `cargo test --manifest-path "clients/rook/Cargo.toml" --bin rook tests::build_server_config_keeps_inbound_auth_separate`
    - Result: **1 passed / 0 failed**

#### Broader suite signal collected

13. `cargo test --manifest-path "clients/rook/Cargo.toml"`
    - Result: full Rook suite still carries unrelated existing failures in:
      - `db::account::tests::vendor_other_with_quotes_round_trips`
      - `routing::tests::cycle_detection_returns_routing_error`

Interpretation: targeted slice evidence is clean; crate-wide noise remains outside this slice.

---

### Verification Summary

- Idempotency applies only to `POST /v1/chat/completions`.
- `/api/*` and `GET /v1/models` remain out of scope even when `Idempotency-Key` is present.
- Valid keyed equivalent requests replay deterministically.
- In-progress keyed replays return conflict without a second execution.
- Mismatched keyed replays return conflict.
- Completed terminal error responses replay deterministically.
- Missing key preserves non-idempotent behavior.
- Store unavailability fails closed.
- Principal scoping is enforced at the replay-store layer.
- Existing streaming and vendor-auth boundaries remain unchanged.

---

### Issues Found

**CRITICAL**

- None for this slice.

**WARNING**

- Full `clients/rook` suite still has two unrelated existing failures outside this slice.
- Principal-isolation evidence is strongest at the service/store layer because the current inbound auth model is a single configured bearer token, not a multi-principal production identity system.

---

### Verdict

**PASS WITH WARNINGS**

The `rook-591-chat-completions-idempotency` slice is implemented and verified against the approved scope with passing targeted evidence. Remaining warnings are repository-level noise or identity-model limitations outside this slice’s intended boundary.
