Build a CLI Tool in Python That People Actually Want to Use

I've built 30+ CLI tools. Most of them sucked. Not because the code was bad — because the UX was terrible. No colors. No progress bars. Cryptic error messages. The kind of tools where you type --help and get a wall of text that helps nobody. Then I discovered a stack that changed everything. Here's how to build CLIs that developers actually enjoy using. The Stack Typer — CLI framework (from the FastAPI creator) Rich — Beautiful terminal output httpx — Async HTTP client pip install typer rich httpx That's it. Three packages. Let's build something real. What We're Building A CLI tool that checks if your project's dependencies have known vulnerabilities. Like npm audit but for any language. $ vulncheck ./requirements.txt ┌─────────────────┬──────────┬────────────────────────┐ │ Package │ Severity │ Fix │ ├─────────────────┼──────────┼────────────────────────┤ │ requests 2.28.0 │ HIGH │ Upgrade to >= 2.31.0 │ │ flask 2.2.0 │ MEDIUM │ Upgrade to >= 2.3.2 │ │ pillow 9.0.0 │ CRITICAL │ Upgrad