## Verification Report

**Change**: rook-599-observability-usage-health-audit
**Version**: N/A

---

### Completeness
| Metric | Value |
|--------|-------|
| Tasks total | 11 |
| Tasks complete | 11 |
| Tasks incomplete | 0 |

All tasks in `openspec/changes/rook-599-observability-usage-health-audit/tasks.md` are marked complete.

---

### Build & Tests Execution

**Clippy**: ✅ Passed

Command run:

```text
cargo clippy --manifest-path clients/rook/Cargo.toml --all-targets -- -D warnings
```

Result: passed with exit code 0.

**Targeted tests**: ✅ Passed

Commands run included:

```text
cargo test --manifest-path clients/rook/Cargo.toml open_in_memory_applies_admin_audit_events_migration
cargo test --manifest-path clients/rook/Cargo.toml open_in_memory_records_admin_audit_events_migration_version
cargo test --manifest-path clients/rook/Cargo.toml append_and_list_admin_audit_events_newest_first
cargo test --manifest-path clients/rook/Cargo.toml sqlite_audit_service_appends_and_lists_recent_events
cargo test --manifest-path clients/rook/Cargo.toml registry_audit_append_and_list_round_trip
cargo test --manifest-path clients/rook/Cargo.toml handle_create_account_appends_audit_event_on_success
cargo test --manifest-path clients/rook/Cargo.toml account_view_redacts_api_key_and_sets_has_api_key
```

Observed results:

- Migration, DB helper, service, and registry audit tests passed.
- Router/handler coverage proved a successful account mutation writes exactly one recent audit event.
- Existing redaction coverage for account responses remained passing.
- Existing `admin_router_preserves_health_and_usage_placeholder` behavior remained intact.

**Coverage**: ➖ Not configured

---

### Spec Compliance Matrix

| Requirement | Scenario | Test | Result |
|-------------|----------|------|--------|
| Persisted Append-Only Admin Audit Events | successful account mutation writes audit record | `admin::handlers::tests::handle_create_account_appends_audit_event_on_success`; `admin::mod::tests::admin_router_records_and_lists_recent_audit_events` | ✅ COMPLIANT |
| Persisted Append-Only Admin Audit Events | successful pool membership change writes audit record | structural handler evidence in `admin/handlers.rs` for add/remove member append path | ✅ COMPLIANT |
| Persisted Append-Only Admin Audit Events | failed mutation does not require persisted audit record | handler structure preserves append only after successful writes; validation returns early before append | ✅ COMPLIANT |
| Redacted Audit Payload Contract | audit payload omits provider credentials on account mutation | `admin::mod::tests::admin_router_records_and_lists_recent_audit_events`; `admin::types::tests::account_view_redacts_api_key_and_sets_has_api_key` | ✅ COMPLIANT |
| Redacted Audit Payload Contract | audit payload omits auth-bearing transport data | handler payload builders store only sanitized resource fields; no auth headers/cookies/request bodies included | ✅ COMPLIANT |
| Bounded Audit Read Surface | recent audit read returns newest-first bounded results | `admin::mod::tests::admin_router_records_and_lists_recent_audit_events`; `db::audit::tests::append_and_list_admin_audit_events_newest_first` | ✅ COMPLIANT |
| Usage Placeholder Contract Remains Honest | usage stays placeholder-only after audit slice lands | `admin::mod::tests::admin_router_preserves_health_and_usage_placeholder` | ✅ COMPLIANT |
| Runtime-Only Health Semantics Remain Honest | health endpoints remain runtime-state reads only | `admin::mod::tests::admin_router_preserves_health_and_usage_placeholder` plus unchanged health handlers | ✅ COMPLIANT |

**Compliance summary**: 8/8 scenarios compliant

---

### Correctness (Static — Structural Evidence)
| Requirement | Status | Notes |
|------------|--------|-------|
| SQLite audit persistence exists | ✅ Implemented | `0005_admin_audit_events.sql`, `db/audit.rs`, and `db/mod.rs` wire the append-only table and migration. |
| Audit service wired through registry | ✅ Implemented | `services/audit.rs`, `services/mod.rs`, and `registry/mod.rs` expose `registry.audit()`. |
| Recent audit read route exists | ✅ Implemented | `admin/mod.rs` registers `/audit/events`; `admin/handlers.rs` returns `AuditEventView` records. |
| Successful mutations append audit events | ✅ Implemented | `admin/handlers.rs` appends after successful account/pool/pool_membership/route/settings mutations. |
| Secret-bearing values remain excluded | ✅ Implemented | audit payload builders only include bounded resource metadata; no `api_key`, tokens, cookies, or raw bodies are serialized. |
| Usage and health semantics remain unchanged | ✅ Implemented | `GET /api/usage` still returns placeholder; health remains runtime-only/in-memory. |

---

### Coherence (Design)
| Decision | Followed? | Notes |
|----------|-----------|-------|
| Emit audit records in admin handlers after success | ✅ Yes | `admin/handlers.rs` appends only after successful service mutations. |
| Persist in SQLite alongside existing Rook persistence | ✅ Yes | Audit rows stored in SQLite via `db/audit.rs`. |
| Expose bounded recent-events read path only | ✅ Yes | `/api/audit/events` provides recent events without broad analytics/search platform scope. |
| Preserve placeholder usage and runtime-only health | ✅ Yes | No new usage accounting or health history was added. |

---

### Issues Found

**CRITICAL** (must fix before archive):

- None.

**WARNING** (should fix):

- Current request attribution is intentionally minimal (`request_id: None` in emitted handler events). This is acceptable for the bounded slice, but richer attribution should be addressed only in a future change with explicit transport-context threading.

**SUGGESTION** (nice to have):

- Add more router-level emission tests for pool membership, route, and settings mutations in a future refinement if broader regression coverage becomes necessary.

---

### Verdict
PASS

The #599 change successfully adds a persisted append-only admin audit trail with a bounded recent-events read surface while preserving honest placeholder usage behavior and runtime-only health semantics.
