Test-Driven Development

by tt-a1i

Test-Driven Development is a Quality skill for Claude Code, published by tt-a1i in matt-skills-with-to-goal.

29 stars7 forkson tt-a1i/matt-skills-with-to-goalAdded 2026/08/12+32% in starsRepository updated 2026/08/11

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Install in seconds

Install Test-Driven Development

Copy Test-Driven Development into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/tt-a1i/matt-skills-with-to-goal/tree/main/skills/engineering/tdd ~/.claude/skills/tdd

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/tt-a1i/matt-skills-with-to-goal.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/engineering/tdd/SKILL.md in tt-a1i/matt-skills-with-to-goal
Installs to: ~/.claude/skills/tdd
Collection: One of 40 skills cataloged from this repository
Category: Quality — 1354 skills

What Test-Driven Development does

Test-Driven Development guides red-green-refactor cycles for writing tests before implementation. Use it when building features or fixing bugs test-first, choosing seams, or adding integration tests.

Test-Driven Development is cataloged under Quality on DirSkills. Test-Driven Development comes from a repository tagged agent-skills, ai-agents, claude-code, codex and coding-agents.

Documentation

README

Excerpt

Test-Driven Development

TDD is the red → green loop. This skill is the reference that makes that loop produce tests worth keeping: what a good test is, where tests go, the anti-patterns, and the rules of the loop. Every section applies on every cycle — consult them before and during the loop, not after.

When exploring the codebase, read CONTEXT.md (if it exists) so test names and interface vocabulary match the project's domain language, and respect ADRs in the area you're touching.

What a good test is

This is the opening of the README. Read the full README on GitHub.

Commands Test-Driven Development provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/codebase-design

Frequently asked about Test-Driven Development

What else does tt-a1i publish alongside Test-Driven Development?
Test-Driven Development is one of 40 skills that DirSkills catalogs from tt-a1i/matt-skills-with-to-goal, the repository it ships in. Its siblings there include Agent Handoff, Ask Matt and Ask Matt. Each one is a separate skill with its own page in this directory, installs the same way Test-Driven Development does, and is maintained by tt-a1i in that same repository. The rest of the collection is listed on the tt-a1i/matt-skills-with-to-goal page.
How does Test-Driven Development compare to other Quality skills?
Test-Driven Development ranks #1319 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Test-Driven Development against them. Open each page to compare what they document and how they install.