udecode/plate @platejs/markdown@53.0.0 on GitHub

Major Changes

#4941 by @zbeyens – Round-trip blockquotes as nested block content instead of flat newline-packed text.
Serialize image titles from node.title instead of copying the caption into the markdown title slot.
Preserve MDX media attribute expressions during markdown serialization instead of stringifying them into JSON text.
Serialize plain URL links back to bare URL markdown instead of bracket-link form.
Round-trip footnote references and definitions as dedicated footnote nodes instead of collapsing them to plain-text fallback.
Migration:
1. Update snapshots and direct value assertions to expect blockquote.children to contain block nodes such as paragraphs and lists.
2. If you generate initial editor values from markdown, hydrate blockquotes with paragraph children instead of flat text.
3. If you want markdown output like ![alt](url "title"), set node.title. Images without a title now serialize as ![alt](url).
4. If you serialize MDX media nodes with expression attributes like width={640}, expect those expressions to stay as expressions instead of turning into quoted JSON.
5. Plain URL links such as https://platejs.org now serialize as bare URLs instead of [https://platejs.org](https://platejs.org).
6. If you enable footnote-aware markdown input, install @platejs/footnote and include BaseFootnoteReferencePlugin and BaseFootnoteDefinitionPlugin so footnote nodes have real editor semantics instead of falling back to unknown node types.
```
// Before
{ type: 'blockquote', children: [{ text: 'Quote\\nNext line' }] }

// After
{
  type: 'blockquote',
  children: [
    { type: 'p', children: [{ text: 'Quote' }] },
    { type: 'p', children: [{ text: 'Next line' }] },
  ],
}
```

Patch Changes

#4941 by @zbeyens – Write canonical date nodes as <date value="..."/> and round-trip normalized media embed metadata
#4941 by @zbeyens – Preserve unknown MDX and raw HTML block source more faithfully during markdown deserialization fallback