Checks whether your compound-engineering plugin installation is current by comparing the version loaded from Claude Code's marketplace cache against the latest plugin.json on main. Run it when you type "ce update" or suspect plugin staleness is causing problems. It handles the fiddly bits of parsing cache paths and querying GitHub, then tells you the exact `claude plugin update` command to run if you're behind. The version comparison targets main HEAD rather than release tags to avoid false positives between releases. Only works in regular Claude Code sessions since it depends on the standard cache layout at ~/.claude/plugins/cache/, so local plugin-dir development correctly bails out with a helpful message.
npx skills add https://github.com/everyinc/compound-engineering-plugin --skill ce-update