The AppFunctions Jetpack framework allows apps to expose structured, callable capabilities directly to the OS and on-device AI agents. This marks a fundamental shift away from fragile screen scraping and rigid intents, enabling true agentic development where models natively discover and invoke your app's features. We will demystify how AppFunctions work and contrast them with older approaches like App Actions and MCP. Through a focused code demo, you will see how to define typed, callable functions that allow agents to execute tasks straight from natural language prompts. Finally, we will cover the practical realities: current limitations, backward compatibility, and essential security considerations. You will leave with a clear roadmap for preparing your app for the next generation of intelligent orchestration.