Apollo Federation

The typescript-resolvers plugin also supports Apollo Federation.

To use it, add federation: true to your configuration:

import { CodegenConfig } from '@graphql-codegen/cli'
 
const config: CodegenConfig = {
  generates: {
    './src/types.ts': {
      plugins: ['typescript', 'typescript-resolvers'],
      config: { federation: true }
    }
  }
}
export default config

It will add the required GraphQL directives to your codegen schema and generate a compatible resolvers signature for Apollo Federation.

For schemas using Apollo Federation v2, the automatic injection of legacy Federation v1 definitions (such as scalar _FieldSet) can cause duplicate definition errors during validation.

To resolve this, set disableFederationDirectiveAndScalarInjection to true in your configuration. This suppresses the automatic injection of legacy directives and scalars, ensuring full compatibility with Federation v2 schemas and preventing validation failures.

import { CodegenConfig } from '@graphql-codegen/cli'
 
const config: CodegenConfig = {
  schema: '<path_to_your_schema>',
  config: {
    federation: true,
    disableFederationDirectiveAndScalarInjection: true
  },
  generates: {
    // ...
  }
}
 
export default config