Write code through a disciplined, BDD-framed Test-Driven Development loop: build a behavior test list, then drive each behavior through red-green-refactor with an enforced observed-failure gate. Use when the user wants to implement, build, or write code test-first, "do TDD", follow "red-green-refactor", drive code from tests, choose the next test by the Transformation Priority Premise (TPP) or ZOMBIES ordering, or grow a feature behavior-by-behavior with tests leading. This skill writes and changes code; it does not produce a test plan document (use test-planning), review or audit existing code (use code-review), restructure existing code outside a TDD loop (use refactor), specify what a feature should do (use plan-a-feature), or find the root cause of a bug (use investigate).
How to install tdd?
testdouble/han/tdd
$npx -y skills add testdouble/han --skill tddInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/testdouble/han" --skill "testdouble/han/tdd"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/testdouble/han" that are relevant to the current task. Run `npx skills add "https://github.com/testdouble/han"` and select the relevant skills, then follow their instructions.
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