# Appfunctions

Analyzes Android apps to find user workflows to expose as AppFunctions, such as...

- Repository: https://github.com/android/skills (10219 stars)
- Category: Design
- License: Complete terms in LICENSE.txt
- Last updated: 2026-10-29
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add android/skills --skill appfunctions -g -a claude-code -y`
Codex: `npx skills add android/skills --skill appfunctions -g -a codex -y`
Cursor: `npx skills add android/skills --skill appfunctions -g -a cursor -y`
Gemini CLI: `npx skills add android/skills --skill appfunctions -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add android/skills`

## Description

Analyzes Android apps to find user workflows to expose as AppFunctions, such as creating a note, playing media, or sending a message. AI agents, voice commands, and system shortcuts then run them without opening the app UI. Generates Kotlin code with the androidx.appfunctions library, and refines KDoc and the app description so that agents choose and call functions correctly. Use this skill when discovering, implementing, documenting, testing, or upgrading AppFunctions in an Android app, including @AppFunctionDeclaration, @AppFunctionSerializable, @AppFunctionServiceEntryPoint, AppFunctionService, app_metadata.xml, appfn:instructions, adb shell cmd app_function, and legacy @AppFunction or AppFunctionConfiguration.Provider code. Don't use for building agents that call AppFunctions or for remote MCP servers.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

Analyzes Android apps to identify key user workflows to expose as AppFunctions,
such as creating a note, playing media, or sending a message, for AI agents,
voice commands, and system shortcuts to run without opening the app UI.

Generates Kotlin code to expose these workflows to the Android system,
allowing agents to discover and execute them on-device.

Also refines KDoc documentation and the app description so AI agents correctly
understand and use the provided functionality.

## Prerequisites

The app must **`targetSdk 36`** or newer and use **`compileSdk 37`** or newer as
AppFunctions, part of the Android platform API, are available from Android 16
onwards.
Always use the Jetpack library because it handles backward compatibility.
Use `androidx.appfunctions:appfunctions` and the KSP compiler
`androidx.appfunctions:appfunctions-compiler`, version 1.0.0-beta01 or later.

## Workflows

This skill enables the caller to discover features that will be provided to
system agents, implement these with AppFunctions, improve function description
for agents, and use ADB commands for local evaluation and testing.

The full AppFunction development flow consists of these four steps:

The rest: https://github.com/android/skills/blob/HEAD/device-ai/appfunctions/SKILL.md