Markdown Formatter

Markdown tables are painful to line up by hand. This formatter rebuilds the separator row, pads every column to its widest cell, and preserves left, center, and right alignment markers (:--, :-:, --:). For example, `|Name|Role|` / `|---|---|` becomes a cleanly padded table with matching column widths. A table that looks malformed — a broken separator row or a wildly mismatched column count — is left unchanged and flagged with a warning instead of being reformatted incorrectly.

Markdown generated by ChatGPT, Claude, Gemini, and similar tools often mixes heading styles, alternates between - and * bullets, restarts numbered lists at 1 repeatedly, and leaves excessive blank lines between sections. The AI Cleanup preset normalizes all of this in one pass — renumbering ordered lists, standardizing bullet markers and emphasis style, and adding consistent spacing around headings — without changing the actual wording of the content.

The GitHub README preset is tuned for README and documentation Markdown: it renumbers ordered lists from 1, formats and aligns tables, keeps task list checkboxes (- [ ] / - [x]) intact, and preserves YAML frontmatter used by static site generators and GitHub Pages. Fenced code blocks showing install commands or usage examples are protected throughout, so they render exactly as written after formatting.