Google has introduced AppFunctions, a framework for Android that allows applications to expose callable functions to AI assistants, currently in experimental preview. This framework enables apps to register capabilities with an OS-level registry, requiring specific permissions for callers, including agents and assistants, to maintain user privacy and security. As of May 2026, integration with Gemini is in a private preview for select testers. AppFunctions targets devices running Android 16 or higher and provides developers with tools like an agent skill and Jetpack tooling for creating Kotlin bindings. The framework aims to enhance Gemini's capabilities, allowing it to use multiple extensions and execute background agent skills, facilitating automation of tasks for users.