This one's a placeholder that hasn't been fleshed out yet. The skill page shows "待完善" (to be completed) across all the key sections like use cases, guidelines, and best practices. It's meant to integrate Midjourney functionality into Claude Code, presumably for AI image generation workflows, but there's no actual implementation detail here. With 119 installs despite the bare bones documentation, people are apparently hoping it gets built out. If you need Midjourney integration now, you'll want to check the actual repo or wait for the maintainers to add the missing pieces. Right now it's more of a stub than a working tool.
npx skills add https://github.com/teachingai/full-stack-skills --skill midjourney