9 min read · Try Markdown Preview
One source of truth in git
Docs next to code travel through pull requests with the same review culture as production changes. Preview tools catch broken tables and heading jumps before merge.
Heading hierarchy matters
A single H1 per document (often the title) and nested H2/H3 sections improve screen reader navigation and auto-generated TOCs on GitHub and static site generators.
Code fences and language tags
Always tag fences with the language for syntax highlighting. Untagged blocks default to plain text and slow down readers scanning for SQL vs shell examples.
ADRs and changelogs
Architecture Decision Records use a consistent Markdown template (context, decision, consequences). Changelogs grouped by version help support teams answer “what changed?” without reading git history.
Publishing beyond GitHub
Hugo, Docusaurus, and MkDocs each add features (front matter, includes). Validate that your preview flavor matches the publisher—especially tables and alerts.
This article is part of the DevToolsHub learning guides—original writing meant to complement our free tools, not replace official documentation from vendors or standards bodies.