tdd
AI DevKit · Test-driven development — write a failing test before writing production code. Use when implementing new functionality, adding behavior, or fixing bugs during active development.
Profile →npx skills add codeaholicguy/ai-devkit --skill tdd --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# TDD Red. Green. Refactor. In that order, every time. ## Hard Rules - No production code without a failing test first. - If production code was written before its test, delete it and start over with a failing test. - Never skip the red step. A test that has never failed proves nothing. ## Cycle For each unit of behavior: 1. **Red** — Write a test for the next behavior. Run it. It must fail. Read the failure message — it should describe the missing behavior. 2. **Green** — Write the minimum production code to make the test pass. Nothing more. Run the test. Apply the `verify` skill. 3. **Refactor** — Clean up both test and production code. Run the test again. Still green? Done. Apply the `verify` skill. Then pick the next behavior and repeat. ## Rules for Each Step **Red:** - Test one behavior, not one function. Name the test after what the system should do, not what the function is called. - The test must fail for the right reason — a missing method, wrong return value, unmet condition. Not a syntax error or import failure. - If the test passes immediately, it's not testing new behavior. Delete it or pick a different behavior. **Green:** - Write the simplest code that passes. Hardc
- Hard Rules
- Cycle
- Rules for Each Step
- Anti-Patterns
- Red Flags and Rationalizations
- Memory Integration
What does the tdd skill do?
AI DevKit · Test-driven development — write a failing test before writing production code. Use when implementing new functionality, adding behavior, or fixing bugs during active development.
How do I install it?
Run `npx skills add codeaholicguy/ai-devkit --skill tdd --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From codeaholicguy/ai-devkit, a repository with 1,572 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.