Codex as an All-Round Dev Companion

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

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

The creator says OpenAI's Codex is useful for more than coding. In his view it also handles sysadmin work and ML tasks, and is especially good at writing documentation.

Key points

• Codex can write code.
• It can also do sysadmin tasks.
• It can handle ML tasks.
• The creator says documentation writing is its most valuable use.

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

Try this

• Try using Codex to write documentation as well as code.