Coworker: An Agent App Inspired by Grok Bot, Built on Pi

Melvin Vivas · X post · 2026-09-04 · Open on X

Topics: AI Agents, Tool Use & MCP, Portfolio Projects · Level: intermediate

Summary

The creator explains that his desktop agent app Coworker isn't meant to compete with Grok Bot. Grok Bot inspired it and helped him understand how to build with agents. Under the hood Coworker runs on Pi (@pidotdev).

Key points

• Coworker is the creator's local-first desktop app for AI coworkers.
• Grok Bot was the inspiration and taught him how to build with agents.
• Coworker uses Pi (@pidotdev) as its agent foundation.
• Studying an existing agent product is a practical way to learn agent design.

Resources mentioned

• Coworker (donvito/coworker) · repo · github.com · free
  The creator's local-first desktop app where you pick an AI coworker and have it produce work such as invoices as finished PDFs.
  Also in: Claude Opus 5.5 for Video Making: Creator's Showcase Thread (Coworker) (Melvin Vivas on X · notes), Coworker: free open-source desktop AI coworker app (Melvin Vivas on X · notes), Coworker: Open-Source Desktop App for AI Agents (Melvin Vivas on X · notes), Using Devin AI to Test the Coworker Desktop App on Windows (Melvin Vivas on X · notes) and 38 more
• Pi · tool · x.com · free
  A customizable coding agent that can be extended through its Extensions API and connected to several model providers.
  Also in: Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Pi reaches v1.0 (Melvin Vivas on X · notes), Claude Code mods: customize behavior and UI with plugins (Melvin Vivas on X · notes), Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes) and 39 more
• Grok Bot · tool · x.ai · paid
  An early-beta AI agent product from the Grok family that runs in its own computer and browser instance and does tasks in your tools.
  Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Using an ML agent to train an open-source TTS model on your voice (Melvin Vivas on X · notes), Organizing Grok Bot Lead Collection in One Google Sheet (Melvin Vivas on X · notes) and 14 more

Try this

• Build your own desktop agent app on top of an existing agent framework such as Pi.