Claude Desktop Buddy provides a lightweight Bluetooth Low Energy (BLE) API directly from the Claude desktop application. This allows developers and hardware enthusiasts to bridge Claude's AI capabilities, specifically Claude Cowork and Claude Code, with physical microcontrollers such as the ESP32. Users can leverage this API to create custom hardware integrations, such as displaying Claude's current operational states or handling AI-generated permission prompts directly on physical devices, extending Claude's functionality beyond the screen.