Release-cycle review found two hardening gaps:
- The sync plugin deleted+rebuilt the WHOLE footnotesList on any reorder/orphan,
replacing every definition's Yjs subtree -> a collaborator typing in a
definition could lose in-flight characters on merge. Rework to targeted,
minimal mutations: attr-only setNodeMarkup for collision re-ids, delete only
genuine orphans, insert only genuinely-missing definitions (at the list end,
not shifting existing subtrees), and consolidate multiple lists only in the
abnormal paste/merge case. An unchanged (correct id, referenced) definition is
left completely untouched. Numbering is decoration-only, so physical list order
may drift after a reorder (accepted) while displayed numbers stay correct.
Invariants preserved (reviewed + tested): one SYNC_META transaction, null when
canonical (terminates), deterministic deriveFootnoteId, remote-skip -> no
re-introduced freeze or divergence.
- computeFootnoteNumbers ran per-NodeView-render (O(n^2)/keystroke in big docs).
The numbering plugin now caches the number map in its state (computed once per
docChanged); NodeViews read it O(1) via getFootnoteNumber.
Tests: no-rebuild-on-reorder asserts unchanged definition node subtrees are
identity-preserved; isRemoteTransaction skip; enableSync:false read-only; cache
correctness. Browser re-smoke: insert (no freeze), number, persist across reload,
cascade delete all pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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