Exposes katana-markdown-linter's Rust-based markdownlint engine to Claude through three MCP tools: lint for checking files, fix for safe repairs, and list_rules for browsing the rule catalog. Works on a workspace root you specify at launch, so Claude can check and fix Markdown across your docs without leaving the conversation. The underlying kml engine supports 50+ markdownlint rules, automatic fixes, formatting mode, and localized rule descriptions in ten languages. Useful when you want Claude to enforce consistent Markdown style in technical writing or catch common documentation errors during drafting. The stdio transport means it runs locally and reads your filesystem directly rather than requiring file uploads.