Learn how to use Codex CLI to add features to Python projects via the terminal. Master AI-powered coding without needing a browser or IDE plugins.

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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.

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

Step 2: Use Codex CLI to Implement a New Feature

Step 3: Refine Project Features With Codex CLI