sidinsearch/AgentCall ? reverse-engineered prompt

Build me AgentCall, a private calling tool that lets a local AI or a person make and control real cellular phone calls through an Android phone connected by one USB cable.

I want an Android app that becomes the default phone app, plus a desktop companion for Windows and Linux that shows contacts, call history, live call controls, and recordings, and can talk through the computer mic and speakers. It should support local agent control through MCP so Hermes and OpenClaw can place and manage calls, and it should handle speech with OpenAI, ElevenLabs, or a local text to speech option. Make it feel safe by default, only working over local USB and refusing to continue if the phone, permissions, recording, or speech setup is wrong.

Please keep the setup simple, make the UI clear, and if you need current docs or API details, look them up online first.