markdown
Markdown Authoring Reference
Reference for markdown documents covering core syntax, GFM extensions, README patterns, technical docs, MDX, and linting. See references/markdown-guide.md for a syntax cheat sheet and references/tech-writing-guide.md for documentation structure.
1. Core Syntax
Headings
# H1 - Document Title (one per file)
## H2 - Major Section
### H3 - Subsection
#### H4 - Detail Level
Use ATX style (#), not Setext. Space after #. Never skip levels. One H1 per file.
Emphasis and Inline
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