Load when implementing a confirmed behavior change through red-green-refactor; diagnose first when the root cause is unknown, and use prototype for throwaway exploration.
How to install tdd?
jasonxzwen/harness-hub/tdd
$npx -y skills add jasonxzwen/harness-hub --skill tddInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/jasonxzwen/harness-hub" --skill "jasonxzwen/harness-hub/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/jasonxzwen/harness-hub" that are relevant to the current task. Run `npx skills add "https://github.com/jasonxzwen/harness-hub"` and select the relevant skills, then follow their instructions.
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- webapp-testingToolkit for interacting with and testing local web applications using Playwright.Jul 2026
- playwright-best-practicesUse when writing Playwright tests, fixing flaky tests, debugging failures, implementing Page Object Model, configuring CI/CD, optimizing performance, mocking…Jul 2026
