Reads from the same shared dir as Skill A.
$npx -y skills add kyure-a/agent-skills-nix --skill skill-bInstalls into the current project.
Run `npx skills use "https://github.com/kyure-a/agent-skills-nix" --skill "kyure-a/agent-skills-nix/skill-b"` 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/kyure-a/agent-skills-nix" that are relevant to the current task. Run `npx skills add "https://github.com/kyure-a/agent-skills-nix"` and select the relevant skills, then follow their instructions.