Alejandro Gutiérrez 05729ad8a4 feat(ga): close remaining GA blockers (backcompat, HA prep, tests, docs) ...

Backwards compat shim (task 27)
- requireCliAuth() falls back to body.user_id when BROKER_LEGACY_AUTH=1
  and no bearer present. Sets Deprecation + Warning headers + bumps a
  broker_legacy_auth_hits_total metric so operators can watch the
  legacy traffic drain to 0 before removing the shim.
- All handlers parse body BEFORE requireCliAuth so the fallback can
  read user_id out of it.

HA readiness (task 29)
- .artifacts/specs/2026-04-15-broker-ha-statelessness-audit.md
  documents every in-memory symbol and rollout plan (phase 0-4).
- packaging/docker-compose.ha-local.yml spins up 2 broker replicas
  behind Traefik sticky sessions for local smoke testing.
- apps/broker/src/audit.ts now wraps writes in a transaction that
  takes pg_advisory_xact_lock(meshId) and re-reads the tail hash
  inside the txn. Concurrent broker replicas can no longer fork the
  audit chain.

Deploy gate (task 30)
- /health stays permissive (200 even on transient DB blips) so
  Docker doesn't kill the container on a glitch.
- New /health/ready checks DB + optional EXPECTED_MIGRATION pin,
  returns 503 if either fails. External deploy gate can poll this
  and refuse to promote a broken deploy.

Metrics dashboard (task 32)
- packaging/grafana/claudemesh-broker.json: ready-to-import Grafana
  dashboard covering active conns, queue depth, routed/rejected
  rates, grant drops, legacy-auth hits, conn rejects.

Tests (task 28)
- audit-canonical.test.ts (4 tests) pins canonical JSON semantics.
- grants-enforcement.test.ts (6 tests) covers the member-then-
  session-pubkey lookup with default/explicit/blocked branches.

Docs (task 34)
- docs/env-vars.md catalogues every env var the broker + CLI read.

Crypto review prep (task 35)
- .artifacts/specs/2026-04-15-crypto-review-packet.md: reviewer
  brief, threat model, scope, test coverage list, deliverables.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-15 23:51:28 +01:00

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