chore(openspec): archive engineering-docs and phase-2-production-ready changes

- engineering-docs → archive/2026-03-29-engineering-docs (63/63 tasks complete)
- phase-2-production-ready → archive/2026-03-29-phase-2-production-ready (89/89 tasks complete)
- openspec/specs/ synced with all Phase 1 + Phase 2 + engineering-docs capabilities (22 specs total)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

openspec/specs/monitoring/spec.md

@@ -0,0 +1,32 @@
+# Spec: Prometheus + Grafana Monitoring
+
+**Status**: Pending CEO approval
+**Workstream**: 7 of 8
+
+## Scope
+- `prom-client` integration — expose `GET /metrics`
+- 7 metrics (counters + histograms) across all services
+- `monitoring/` directory: Prometheus config + Grafana provisioning
+- `docker-compose.monitoring.yml` overlay (adds prometheus + grafana services)
+- Pre-built Grafana dashboard JSON (`monitoring/grafana/dashboards/agentidp.json`)
+
+## Metrics
+
+| Metric | Type | Labels |
+|--------|------|--------|
+| `agentidp_tokens_issued_total` | Counter | `outcome` (success/failure) |
+| `agentidp_agents_registered_total` | Counter | `outcome` |
+| `agentidp_http_requests_total` | Counter | `method`, `path`, `status_code` |
+| `agentidp_http_request_duration_seconds` | Histogram | `method`, `path` |
+| `agentidp_rate_limit_rejections_total` | Counter | — |
+| `agentidp_db_query_duration_seconds` | Histogram | `operation` |
+| `agentidp_redis_command_duration_seconds` | Histogram | `command` |
+
+## Acceptance Criteria
+- [ ] `GET /metrics` returns Prometheus text format
+- [ ] `/metrics` endpoint does NOT require Bearer auth (Prometheus scrapes it)
+- [ ] All 7 metrics present and updating under load
+- [ ] Grafana dashboard auto-provisions on `docker compose -f docker-compose.monitoring.yml up`
+- [ ] Grafana runs on port 3001 (no conflict with AgentIdP on 3000)
+- [ ] `docs/devops/operations.md` updated with monitoring section
+- [ ] `prom-client` added as new dependency — CEO approval gate