API Architecture (API-First Design)

Version: v1.0
Status: Draft → Frozen (Week 0)
Approach: OpenAPI 3.1 specification drives implementation
Last Updated: 15 January 2026

API-First Principles

  1. Contract-First: OpenAPI spec written BEFORE code
  2. Single Source of Truth: All SDKs generated from spec
  3. Backward Compatibility: Never break existing clients
  4. Explicit Over Implicit: Clear request/response schemas
  5. Fast by Default: Design for caching and minimal round trips

RESTful Constraints