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apollo-kotlin

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by apollographql · part of apollographql/skills

Guide for building applications with Apollo Kotlin, the GraphQL client library for Android and Kotlin. Use this skill when: (1) setting up Apollo Kotlin in a Gradle project for Android, Kotlin/JVM, or KMP, (2) configuring schema download and codegen for GraphQL services, (3) configuring an `ApolloClient` with auth, interceptors, and caching, (4) writing queries, mutations, or subscriptions,

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🔌 This skill ships inside the Apollo GraphQL Skills plugin — install the plugin and you also get an MCP server.

This is the playbook your agent receives when the skill activates — you don't need to read it to use the skill, but it's here to audit before installing.

Apollo Kotlin Guide

Apollo Kotlin is a strongly typed GraphQL client that generates Kotlin models from your GraphQL operations and schema, that can be used in Android, JVM, and Kotlin Multiplatform projects.

Process

Follow this process when adding or working with Apollo Kotlin:

  • Confirm target platforms (Android, JVM, KMP), GraphQL endpoint(s), and how schemas are sourced.
  • Configure Gradle and code generation, including custom scalars
  • Create a shared ApolloClient with auth, logging, and caching.
  • Implement operations.
  • Validate behavior with tests and error handling.

Reference Files

  • Setup - Gradle plugin, schema download, codegen config (including scalars), client configuration (auth, logging, interceptors)
  • Operations - Queries, mutations, subscriptions, and how to execute them
  • Caching - Setup and use the normalized cache
  • Migration Guide - Migrate from Apollo Kotlin 4

Scripts

Key Rules

  • Prefer Apollo Kotlin v5+. Do not use v3 or older versions.
  • Keep schema and operations in source control to make builds reproducible.