Markdown Lint Rules That Catch Real Docs Problems

Markdown linting is not about making every document rigid. It is about catching small problems that create broken anchors, noisy diffs, confusing code blocks, and inconsistent docs reviews.

Rules worth checking first

• Duplicate heading text
• Missing space after heading markers
• Trailing whitespace
• Repeated blank lines
• Unclosed fenced code blocks

Lint workflow

1. Paste the Markdown into a lint tool.
2. Fix syntax issues before wording changes.
3. Check duplicate headings because they can break TOC anchors.
4. Close code fences before previewing the document.
5. Run preview after lint fixes to confirm the rendered result.

Project-specific exceptions

Docs platforms vary. A rule that is correct for a README may be too strict for MDX, help center imports, or Markdown generated by a CMS.

Conclusion

A practical Markdown lint pass catches the problems humans tend to miss when reading rendered docs.