Use computer use to auto-screenshot your app, update the README, and record a demo

Melvin Vivas · X post · 2026-08-27 · Open on X

Topics: AI Dev Tools & Productivity, AI Agents, Tool Use & MCP · Level: beginner

Summary

Turn on computer use in Codex or Claude so the agent can run your app, take screenshots, and add them to your README. Then go further and ask it to make a video walkthrough of your app.

Key points

• Turn on computer use in Codex or Claude so the agent can control your desktop and app
• Ask the agent to take screenshots of your running app
• Have it update the README with the screenshot images
• Ask it to make a demo video walkthrough of the app
• This automates documentation and demo work for portfolio projects

Resources mentioned

• OpenAI Codex · tool · openai.com · paid
  OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
  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), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more
• Claude Opus 5.5 · tool · claude.ai · paid · open in a browser to verify · recommended by both Bashiri Smith & Melvin Vivas
  Anthropic's AI assistant, used throughout the guide to tailor resumes, add live roles to the tracker, match connections to target companies and find hiring managers.
  Also in: Generating a Repo Promo Video with a Claude Skill on Sonnet 5.5 vs Opus 5.5 (Melvin Vivas on X · notes), Comparing Coding Models on the Same Task in Devin iOS (Melvin Vivas on X · notes), Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), AI Engineer Roadmap Overview: From ML Foundations to RAG, Agents & Ops (Bashiri Smith on Facebook · notes) and 53 more

Try this

• Turn on computer use in Codex or Claude
• Ask the agent to screenshot your app and update the README with the images
• Ask it to make a demo video walkthrough of your app
• Have an agent automatically document a portfolio project with screenshots and a demo video