This consolidates API documentation patterns into reusable guidance so you're not explaining docstring formats and REST conventions in every project prompt. It covers the standard stuff: Python docstrings, JSDoc, Godoc, OpenAPI specs, and README structures with actual examples you can pattern match against. The core principles are solid (document why not what, keep docs near code, show examples). Worth noting it includes anti-patterns too, which is helpful when you're trying to avoid redundant comments or outdated docs. If you're spinning up agents that touch APIs or write libraries, this saves you from copy-pasting the same documentation standards repeatedly. The 100-150 lines saved per agent claim seems about right.
npx skills add https://github.com/bobmatnyc/claude-mpm-skills --skill api-documentation