Where's the proof, Billy?" — stop and prove a claim with deep investigation.
$npx -y skills add lexfrei/ccc --skill billyInstalls into the current project.
Run `npx skills use "https://github.com/lexfrei/ccc" --skill "lexfrei/ccc/billy"` 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/lexfrei/ccc" that are relevant to the current task. Run `npx skills add "https://github.com/lexfrei/ccc"` and select the relevant skills, then follow their instructions.