$npx -y skills add svenja-dev/claude-code-skills --skill behavior-testingInstalls into the current project.
Run `npx skills use "https://github.com/svenja-dev/claude-code-skills" --skill "svenja-dev/claude-code-skills/behavior-testing"` 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/svenja-dev/claude-code-skills" that are relevant to the current task. Run `npx skills add "https://github.com/svenja-dev/claude-code-skills"` and select the relevant skills, then follow their instructions.