tdd-red-green-refactor

What the skill teaches

A test-driven development skill kept in Google Labs' design.md repository and written for TypeScript and Node.js. The agent writes one test, for example in Vitest or Jest, runs it and checks that it fails because the logic is missing rather than because of a setup error, writes the simplest code that passes, then refactors while rerunning the suite and undoing any change that turns it red. It forbids writing a batch of tests at once and editing an existing test to make failing code pass unless the requirement changed, and uses strict typing as a check against guessed solutions. A worked Vitest example is included.

Capabilities

Details