Markdown Linter

This linter appears to do what it says: it reads Markdown files you point it at and optionally makes HTTP requests to check external links. Before installing or running it, consider: (1) Don’t run it with broad globs ("**/*.md") on untrusted repositories if you’re worried about scanning many files you didn’t intend to expose. (2) Avoid enabling --check-external-links on untrusted input because the tool will make outbound requests to URLs found in the documents (this could be abused to probe internal services or contact attacker-controlled endpoints). (3) Review the full scripts/main.py (the provided snippet was truncated) yourself if you want higher assurance that there are no hidden network endpoints or suspicious behavior. If you need to be extra cautious, run the linter in a sandboxed environment or inspect/execute it locally rather than allowing autonomous agent invocation.