GraphQL Federation skill for creating correct federation subgraphs. Use when: (1) Creating new federation subgraphs, (2) Adding entities with @key directives, (3) Extending types across subgraphs, (4) Using federation directives (@shareable, @external, @override, @provides, @requires, @inaccessible, @interfaceObject, @authenticated, @requiresScopes), (5) Debugging composition errors, (6) Understanding federation rules and patterns. MANDATORY TRIGGERS: federation, subgraph, @key, entity, federated graph, supergraph, GraphQL composition, router schema
Create and modify APIs using WunderGraph Cosmo Connect. Covers gRPC plugin development (Go/TypeScript), standalone gRPC services, schema-to-proto workflows, CLI commands (wgc), local router setup, graph.yaml composition, field resolvers, batching, federation entities, and deployment. Use when building Cosmo Connect subgraphs, plugins, gRPC services, or setting up a local Cosmo Router.