Phase B addresses 7 high-severity gaps from the permissions audit:
- B1: Enforce tree access check on session start via can_access_tree
- B2: Replace all inline permission helpers with centralized permissions.py
- B3: Fix require_engineer_or_admin to check is_team_admin before role
- B4: Add is_active field on User with enforcement in get_current_active_user
- B5: Add admin user management endpoints (list, get, role, team-admin, deactivate, activate)
- B6: Add rate limiting on auth/invite endpoints via slowapi (disabled in DEBUG)
- B7: Implement refresh token rotation with JTI-based revocation and meaningful logout
Also reduces access token TTL from 15 to 5 minutes and updates CLAUDE.md
with SaaS/MSP context for future planning sessions.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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