Agent Skills: documentation

Creates and maintains technical documentation including API docs, README files, architecture docs, changelogs, ADRs, and inline code comments. Handles all documentation needs from code-level docstrings to project-level guides. Trigger keywords: documentation, docs, document, README, tutorial, guide, reference, changelog, ADR, architecture decision record, docstring, JSDoc, rustdoc, pydoc, markdown, mdx, api docs, user guide, developer guide, inline comments, code comments.