# uv TDD

> Use when starting a Python project with uv and building it test first.

A development process for Python applications that uses TDD to iterate on a new project based around uv. Use when Claude needs to create a new Python project, write Python code with tests, or work on Python development using test-driven development practices with the uv package manager.

## Facts

- Type: Agent skill
- Discipline: Engineering
- Author: Simon Willison (https://github.com/simonw)
- Upstream: https://github.com/simonw/skills/blob/main/uv-tdd/SKILL.md
- Source file: https://raw.githubusercontent.com/simonw/skills/main/uv-tdd/SKILL.md (2132 bytes, sha256:48dede0c7573816b8f8441a92ffa66251fbdb3b7b9b8dc7a5543ad3b7cdc6498)
- Licence: none declared by the repo
- Upstream copy last changed: 2026-09-17
- Status: listed, not yet ruled on by the curator

## Use it

I want to use the uv TDD skill by Simon Willison.
This is what it does, in the author's own words: A development process for Python applications that uses TDD to iterate on a new project based around uv. Use when Claude needs to create a new Python project, write Python code with tests, or work on Python development using test-driven development practices with the uv package manager.
Download the whole folder at https://github.com/simonw/skills/tree/main/uv-tdd, SKILL.md and every file beside it, into your skills directory: ~/.claude/skills/uv-tdd/ for Claude Code, ~/.agents/skills/uv-tdd/ for Codex, ~/.cursor/skills/uv-tdd/ for Cursor. Get it from the author's repo, not from startupskills.dev.
Then tell me the path you installed it to and how to invoke it.

Nothing here is vendored: install from the author's repo. This file carries none of the author's file.

## Links

- Page: https://startupskills.dev/simonw/uv-tdd
- Author: https://startupskills.dev/simonw
- Index: https://startupskills.dev/llms.txt

## The file

Not reproduced here: the repo does not license republication. Read it on the author's GitHub:
https://github.com/simonw/skills/blob/main/uv-tdd/SKILL.md