FreeCodeCamp Publishes Comprehensive OpenAI Codex Handbook — CLI, IDE, Cloud, and GitHub Workflows

FreeCodeCamp·medium signal

FreeCodeCamp published a detailed practical guide to OpenAI's Codex platform covering its four surfaces: CLI, IDE extensions (VS Code, Cursor, Windsurf), the desktop app, and Codex Cloud for background tasks against GitHub repos. The handbook (v1.3, last updated April 30) documents Codex's evolution into an agentic workflow layer wrapping GPT-5.5 with file access, shell execution, sandboxes, and approval flows. For builders evaluating coding agents, this is the most complete single-source Codex reference available.