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expo-module

Skill

Framework (OSS). Guide for creating and writing Expo native modules and views using the Expo Modules API (Swift, Kotlin, TypeScript). Covers module definition DSL, native views, shared objects, config plugins, lifecycle hooks, autolinking, and type system. Use when building or modifying native modul

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Install

git clone https://github.com/expo/skills.git ~/.claude/skills/expo-module

What is expo-module?

Framework (OSS). Guide for creating and writing Expo native modules and views using the Expo Modules API (Swift, Kotlin, TypeScript). Covers module definition DSL, native views, shared objects, config plugins, lifecycle hooks, autolinking, and type system. Use when building or modifying native modules for Expo. Not for migrating an existing Swift module from the definition DSL to the Expo Modules API 2.0 macros; use expo-migrate-module (from the expo-experiments plugin) for that.

What this can do

Capabilities declared in this component's own frontmatter — not inferred.

Inherit all session tools

Declares no tool restrictions — inherits every session tool

~121 tokens of context used while enabled, before you invoke anything

Documentation

README · ~3 min read

Writing Expo Modules

Complete reference for building native modules and views using the Expo Modules API. Covers Swift (iOS), Kotlin (Android), and TypeScript.

When to Use

  • Creating a new Expo native module or native view
  • Adding native functionality (camera, sensors, system APIs) to an Expo app
  • Wrapping platform SDKs for React Native consumption
  • Building config plugins that modify native project files
  • Adding Android, Apple, or web support to an existing Expo module
  • Editing expo-module.config.json, config plugins, or lifecycle hooks

To migrate an existing Swift module from the definition DSL to the Expo Modules API 2.0 macros (@ExpoModule, @JS, @Event), use the expo-migrate-module skill (from the expo-experiments plugin) instead.

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