How to Add Features to a Python Project With Codex CLI – Real Python

A step-by-step guide to using OpenAI's Codex CLI to add and refine features in a Python terminal app. Using a contact book TUI built with Textual as the example project, the tutorial covers installing and authenticating Codex CLI, using Plan mode to implement Delete and Clear All button functionality, reviewing AI-generated diffs, iteratively refining the code through follow-up prompts, and adding confirmation dialogs for destructive actions. Key practices like Git versioning before AI edits and reviewing generated code are emphasized throughout.