# Phase 8 Enterprise Validation Summary

## 1. Completion Confirmation for Phases 1–7
Each phase below has been validated, the enforcement mechanisms are operational, and failure modes have been documented for operators.

### Phase 1 — Tenant Isolation
- **Validation criteria:** WebSocket broadcasts partitioned by authenticated user, Supabase RLS policies on orders and trade_history, and filtered runtime states tied to user_id.
- **Evidence:** RLS policies, tenant metrics, and failure scenarios covering cross-tenant attempts documented in runbooks.

### Phase 2 — Restart Durability
- **Validation criteria:** Startup routine reloads active profiles, exchange open orders/positions, and rebuilds lifecycle/capital maps deterministically.
- **Evidence:** Log traces of profile reload, ledger rebuild metrics, and restart-recovery runbook coverage.

### Phase 3 — Capital Ledger
- **Validation criteria:** Ledger invariant `allocated - reserved_for_orders - reserved_for_positions + realized_pnl >= 0` holds, and ledger rebuilds on restart while supporting entry, fill, cancel, and exit adjustments.
- **Evidence:** Ledger RPCs, capital-invariant metrics, reconciliation ledger sync, and capital-invariant runbook handling violations.

### Phase 4 — Transactional Lifecycle
- **Validation criteria:** ENTRY/EXIT persistence occurs inside single DB transactions with idempotent constraints, ensuring lifecycle data only appears after exchange confirmation.
- **Evidence:** fn_persist_entry_lifecycle, UNIQUE constraints, lifecycle metrics, and lifecycle-incident runbook.

### Phase 5 — Reconciliation
- **Validation criteria:** Loop compares full DB/exchange sets, obtains profile locks, routes discrepancies through lifecycle handlers, and resets mismatch metrics automatically.
- **Evidence:** reconciliation lock table, mismatch metrics, reconciliation runbook, and failure scenarios for missing/excess orders.

### Phase 6 — Distributed Safety
- **Validation criteria:** Row-based entry locks with TTL and owner tokens combined with deterministic clientOrderId prevent duplicate entries and survive multi-instance deployments.
- **Evidence:** entry_locks table, lock metrics (contention and latency), and lock-contention runbook.

### Phase 7 — Observability & Health
- **Validation criteria:** /metrics and /internal/health track trading, monitor, reconciliation loops alongside lock, capital, and exchange health, permitting rapid detection of failures.
- **Evidence:** health endpoint fields, Prometheus metrics, structured logs, and loop-health runbook.

## 2. Final Checklist Mapping
| Requirement | Enforcement | Detection | Recovery |
|-------------|-------------|-----------|----------|
| Tenant isolation | Supabase RLS, WebSocket filters | RLS audit logs, tenant breach alerts | Reject broadcast, block execution, notify compliance |
| Capital invariant | Ledger RPCs + watcher | `capitalInvariantViolations`, gauge dips | Reconciliation rebuild, trading loop pause for profile |
| Lifecycle atomicity | Entry/exit RPC transactions + UNIQUE constraints | DB transaction failures, reconciliation mismatch | RPC retry, lifecycle handler repair |
| Exchange truth | Exchange-first ordering before persistence | Reconciliation mismatch count, missing metrics | Lifecycle handler corrections |
| Entry exclusivity | Row-based locks + deterministic clientOrderId | `lockContentionCount`, lock TTL expiration | Wait TTL, reattempt, escalate via lock-contention runbook |
| Reconciliation parity | Lock + handler routing | `reconciliationMismatchCount`, missing metrics | Handler-guided correction, metrics reset |
| Observability coverage | Prometheus counters + health endpoint | `/internal/health` flags, metric spikes | Alerts trigger runbooks, loops restart if needed |

## 3. System Guarantees
- Capital never goes negative for active profiles thanks to ledger invariant enforcement and capital watchdog metrics.
- Only one ENTRY per profile/symbol proceeds at a time due to distributed row locks and deterministic clientOrderId.
- Lifecycle persistence is atomic, always triggered after confirmed exchange events, and idempotent on retries.
- Database state converges to exchange truth through reconciliation and structured health metrics, providing eventual consistency.
- Observability ensures loops, locks, and capital invariants are monitored and documented for operators.

## 4. Explicit Non-Guarantees
- Does not guarantee immediate dashboard synchronization; reconciliation is eventual.
- Does not guarantee tolerance for prolonged Supabase outages without ops intervention—trading pauses until Supabase is writable.
- Does not permit ad-hoc manual ledger or lifecycle edits; such edits require formal runbook approval.

## 5. Future Change Safety
- Any future agent must review docs/invariants.md and these runbooks before touching lifecycle RPCs, ledger services, reconciliation logic, or locking mechanisms.
- Changes must preserve the phase-by-phase guarantees and maintain all health/metrics fields referenced herein.
- Operators should verify that metrics and health indicators remain functional after updates, updating runbooks if detection/recovery steps change.