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ProseMirror's document model is a tree structure where positions are calculated by traversing nodes, accounting for structural elements (opening/closing tags of nodes like paragraphs, lists, etc.). A position in ProseMirror is not "character index N". Structual boundaries like "start of paragraph" also get their own index. A document with two paragraphs "ab" and "cd" has positions: 0 1 2 3 4 5 6 7 8 <p> a b </p><p> c d </p> So when I serialize a ProseMirror document to plain text for external processing: 01 234 "ab\ncd" I need to save this mapping information so when the external system says "there's something interesting at characters [3,4]", I can map that back to ProseMirror positions to do something useful: highlighting, applying marks, or making selections. fix: measure site visits |
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| CLAUDE.md | ||