Apply BDD testing principles: test pyramid, behavior-driven tests, proper test doubles, and maintainable test suites
$npx -y skills add fredericvilcot/clean-claude --skill test-craftInstalls into the current project.
Run `npx skills use "https://github.com/fredericvilcot/clean-claude" --skill "fredericvilcot/clean-claude/test-craft"` 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/fredericvilcot/clean-claude" that are relevant to the current task. Run `npx skills add "https://github.com/fredericvilcot/clean-claude"` and select the relevant skills, then follow their instructions.