yakpanel-core/architecture/2026/19-saas-hardening-phase-implementation.md

Phase 7 Implementation: SaaS Hardening

Delivered scope

Quotas and plan enforcement hooks

• Added QuotaService for tenant resource checks.
• Added BillingHooksService for usage event emission.
• Added APIs:
  • POST /api/v1/saas/quotas/check
  • POST /api/v1/saas/usage-events

Webhook management

• Added webhook controller for endpoint CRUD/test placeholders.
• Added APIs:
  • GET /api/v1/webhooks
  • POST /api/v1/webhooks
  • POST /api/v1/webhooks/test

Scoped public API

• Added token service and public API controller.
• Added APIs:
  • POST /api/v1/public/tokens
  • POST /api/v1/public/tokens/introspect

Data model additions

• plan_limits
• usage_counters
• webhook_endpoints
• webhook_deliveries
• public_api_tokens

Notes

• This phase establishes hardening boundaries and contracts.
• Token/hash generation, secret encryption, and retry workers are the next productionization tasks.