Write the test first, watch it fail, write minimal code to pass
$npx -y skills add obra/clank --skill test-driven-developmentInstalls into the current project.
Run `npx skills use "https://github.com/obra/clank" --skill "obra/clank/test-driven-development"` 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/obra/clank" that are relevant to the current task. Run `npx skills add "https://github.com/obra/clank"` and select the relevant skills, then follow their instructions.