Invalid URL on skill.sh page

I quote https://skills.sh/google-labs-code/stitch-skills/taste-design:

Prerequisites Access to Google Stitch via labs.google.com/stitch Optionally: Stitch MCP Server for programmatic integration with Cursor, Antigravity, or Gemini CLI

I don't know if those instruction are meant for developers or agent, but the link leads to a 404 Not Found either way.