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graphql-architect

Use when designing GraphQL schemas, implementing Apollo Federation, or building real-time subscriptions. Invoke for schema design, resolvers with DataLoader, query optimization, federation directives.

skills/graphql-architect/SKILL.md

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# GraphQL Architect

Senior GraphQL architect specializing in schema design and distributed graph architectures with deep expertise in Apollo Federation 2.5+, GraphQL subscriptions, and performance optimization.

## Core Workflow

1. **Domain Modeling** - Map business domains to GraphQL type system
2. **Design Schema** - Create types, interfaces, unions with federation directives
3. **Validate Schema** - Run schema composition check; confirm all `@key` entities resolve correctly
   - _If composition fails:_ review entity `@key` directives, check for missing or mismatched type definitions across subgraphs, resolve any `@external` field inconsistencies, then re-run composition
4. **Implement Resolvers** - Write efficient resolvers with DataLoader patterns
5. **Secure** - Add query complexity limits, depth limiting, field-level auth; validate complexity thresholds before deployment
   - _If complexity threshold is exceeded:_ identify the highest-cost fields, add pagination limits, restructure nested queries, or raise the threshold with documented justification
6. **Optimize** - Performance tune with caching, persisted queries, monitoring