Improve MarkdownDef formats#4029

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lukemelia wants to merge 4 commits intomainfrom

cs-10221-improve-markdown-def-formats

Commits on Feb 19, 2026

Improve MarkdownDef formats with rich rendering and distinct layouts

lukemelia
and
claude
committed
Refine MarkdownDef: head format, embedded dedup, and first-heading margin

lukemelia
and
claude
committed

Commits on Feb 20, 2026