SentryAgent.ai Developer 16497706d3 feat(phase-5): WS2 — A2A Authorization ...

Implements agent-to-agent delegation chains:
- Migration 024: delegation_chains table with HMAC signature, TTL, revocation
- DelegationCrypto: HMAC-SHA256 sign/verify, UUID token generation
- DelegationService: create (scope subset validation, self-delegation guard,
  same-tenant delegatee check), verify (returns valid: false on expired/revoked,
  never throws), revoke (delegator-only, conflict guard)
- DelegationController + router at /oauth2/token/delegate (POST/DELETE) and
  /oauth2/token/verify-delegation (POST)
- Feature-flagged behind A2A_ENABLED env var (default on)
- Prometheus metrics: delegations_created/verified/revoked_total
- 33 tests (unit + integration): all pass, DelegationService 87.5%+ branch coverage

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

2026-04-03 02:49:36 +00:00

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