Lark Markdown

This handles Markdown files stored as regular files in Lark Drive, not the fancy docx documents. You get three operations: create uploads a new .md file, fetch reads one back, and overwrite replaces the content of an existing file. The skill is strict about file extensions and won't work without them. If you need to import Markdown as an actual Lark document, rename files, move things around, or handle permissions, you'll need to switch to the lark-drive skill instead. It's a narrow tool that does one thing: treat Drive like a place to park plain Markdown files and edit them later.