tdd — Skills — getagentictools

What it does

Red before green. Write the failing test first, then only enough code to pass it. Don't anticipate future tests or add speculative features.

One slice at a time. One seam, one test, one minimal implementation per cycle.

Refactoring is not part of the loop. It belongs to the review stage (see the code-review skill), not the red → green implementation cycle.

Test-driven development with vertical slices, behavior-focused tests, and incremental red-green-refactor cycles.

Source

Repository: https://github.com/mattpocock/skills

tdd FAQ

What does the tdd skill do?

Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests. Red before green. Write the failing test first, then only enough code to pass it. Don't anticipate future tests or add speculative features. One slice at a time. One seam, one test, one minimal implementation per cycle.

How do I install tdd?

Run: npx -y skills add https://github.com/mattpocock/skills --skill tdd --agent claude-code — the source lives at github.com/mattpocock/skills.

Maintain tdd?

Let people know it's listed here — add the badge (live metrics, light/dark aware) or a plain link to your README or docs.

[![tdd on getagentictools](https://getagentictools.com/badge/skills/mattpocock-skills-tdd.svg)](https://getagentictools.com/skills/mattpocock-skills-tdd?ref=badge)

npx agentictools info skills/mattpocock-skills-tdd

The second line is the CLI lookup for this page — handy in READMEs and docs.