feat: Add header-based splitting to MarkdownTextSplitter #4861
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- Add dropdown for header level selection (H1-H6) - Implement hierarchical splitting (H2 includes H1 headers) - Headers preserved with content sections - Prioritize semantic boundaries over chunk size
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Description:
Summary
Adds configurable header-based splitting to MarkdownTextSplitter component for semantic document
chunking by writing a custom method since its not a native option in langchain.js.
Features
Testing
✅ Tested with 23KB real-world markdown document
✅ All splitting scenarios working correctly
✅ Production build successful
Results