api

# api **Layer 1 — Domain Foundation (v2.0)** Corrects the 13 most common API design mistakes agents make, grounded in 5 authoritative sources: - **Geewax** (API Design Patterns) — cursor pagination, error structure, idempotency, request deduplication - **Amundsen** (RESTful Web API Cookbook) — PUT for idempotent creates, HTTP method semantics - **Ousterhout** (Philosophy of Software Design) — information hiding, define errors out of existence, different layer/different abstraction - **Kleppmann** (Designing Data-Intensive Applications) — network failures are normal, batch processing, data integrity - **Gough/Bryant** (Mastering API Architecture) — schema validation, API lifecycle, backward compatibility, deprecation ## What's Included | Type | Count | Coverage | |------|-------|----------| | Patterns | 13 | Error envelope, input validation, cursor pagination, batch queries, auth-first, URL conventions, rate limiting, idempotent writes, separate representation, versioning, HTTP status codes, structured logging, health endpoints | | Anti-patterns | 9 | Inconsistent errors, trusting input, returning all records, N+1 loops, bolt-on auth, non-idempotent creates, leaking DB internals, 200-with-error-body, no versioning plan | | Constitution | 11 | principles | Every pattern includes code examples showing wrong vs right approaches. Every anti-pattern includes root cause explaining WHY agents default to the wrong behavior.