write-failing-test

You can generate failing tests from a spec by running /write-failing-test path/to/spec.md. The tool reads the approved Test Plan and automatically creates concrete unit and integration tests that fail by design to validate feature scope.

The red phase in TDD is the initial stage where you write tests that fail before implementation. You can automate this red phase by using a tool that reads your planned test criteria and generates failing JavaScript or TypeScript tests.

Yes, you can use this to create failing tests for JavaScript and TypeScript projects. It coordinates with TDD workflows to cover both unit and integration tests, ensuring each planned criterion results in a concrete failing test before implementation proceeds.

To ensure generated tests align with your spec criteria, the tool verifies plan-to-test alignment by checking that each Plan criterion has a corresponding test. This preserves traceability between the spec and the codebase during test generation.

Before generating failing tests from a spec, you need an approved Test Plan with a status of Planned. You should also use the /plan-tests workflow to define your criteria, ensuring the skill has a structured plan to read and convert into failing tests.

After generating failing tests in TDD, you should proceed to the implementation phase using the /implement-to-pass workflow. This next step involves writing the minimum code necessary to make the previously generated failing tests pass.