Framework Code Review

Use this skill when reviewing or writing framework-level code: handler, parser, protocol, router, CLI runtime, FFI, or state management. The checklist is generic - apply every section to every PR that touches core logic.

Complements: perf (speed and memory optimization), quality-gate (automated checks), ffi (C ABI boundary safety).

1 - Cross-layer contract parity

Every behavioral contract that spans more than one layer (parser → protocol → handler → client) must be identical in semantics. Mismatches cause silent divergence between SSR and client rendering.