ChatGPT/Codex
ChatGPT/Codex is the learning topic for using OpenAI’s chat AI and coding agent in practical development work.
This topic treats Codex not as a simple code generator, but as a development agent connected to local workspaces, cloud environments, IDEs, GitHub, and verification commands.
What I Cover Here
Section titled “What I Cover Here”Understand the main Codex entry points and how Codex connects to ChatGPT plans and development environments.[1]
Learn a staged model for using Codex, from chat-based advice to repository-level implementation, review, and automation.
Practice expanding the scope of work you give Codex while keeping verification and review clear.
Design the working environment Codex needs: AGENTS.md, shared rules, verification commands, permissions, and GitHub integration.
Learn how to connect the ChatGPT mobile app to a Codex App host and give instructions, approve actions, review diffs, and inspect test results away from your desk.
References
Section titled “References”- OpenAI, Codex documentation, 2026