Codex Computer Use with Astra for Human-Like App Testing

Melvin Vivas · X post · 2026-09-14 · Open on X

Topics: AI Dev Tools & Productivity, AI Agents, Tool Use & MCP, Evaluation (Evals) & Testing · Level: intermediate

Summary

The creator says Codex is good at computer use, especially with Astra. You can ask it to test your app the way a human would: it reads feedback from the UI and logs, iterates and fixes issues, which saves time on manual testing.

Key points

• Ask the agent to test your app like a human user would.
• The agent gathers feedback from both the UI and the logs.
• It loops: test, find an issue, fix, re-test.
• This can replace a lot of manual QA.

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
• GPT-6 Astra · tool · openai.com · paid
  The model announced in the quoted launch post, pitched as the developer's most capable model for work, coding, science and cybersecurity, and able to operate a computer.
  Also in: Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), Pi Agent Council: Ask Multiple LLMs in Parallel and Compare Their Advice (Melvin Vivas on X · notes), Use GPT-6.1 Sol by Default, Save Astra for Emergencies (Melvin Vivas on X · notes), Dots in ChatGPT: always-on AI agents that you hand responsibilities to (Melvin Vivas on X · notes) and 49 more

Try this

• Ask Codex (with computer use) to test your app like a human and fix the issues it finds.