GraphQL APIs AI Skill Guide (Claude)

Overview & Engine Architecture

GraphQL exposes a typed schema (types, queries, mutations, subscriptions) where clients select fields. The runtime parses → validates → executes resolvers. Naive per-field DB access causes N+1 query fan-out. Agents design schemas for product use cases, enforce authz in resolvers/fields, batch with per-request DataLoaders, paginate lists, and harden public graphs with depth/complexity limits and optional persisted/allowlisted operations.