Footnotes were strict 1:1: a repeated `[^a]` reference was treated as a
collision and re-id'd to `a__2`, and a reference with no definition synthesized
its own empty one — so an agent-authored article with reused labels produced
dozens of empty `kowiki__N` footnotes. Move to Pandoc REUSE semantics and add
non-fatal import diagnostics.
Reuse (core):
- resolveCollisions (footnote-sync): repeated references sharing an id are REUSE
(recorded once in document order, never re-id'd) — one number, one shared
definition. Only a duplicate DEFINITION is re-id'd deterministically and, with
no matching reference, dropped by the existing orphan policy (first-wins).
CollisionPlan.refReids is now always empty (harmless no-op downstream).
- extractFootnoteDefinitions (marked) and extractFootnotes (MCP): duplicate
definition ids are FIRST-WINS (keep first, drop rest); reference markers are
never rewritten. Removed the marker-rewriting and the now-dead deriveFootnoteId
mirror + helpers from the MCP path.
Import diagnostics:
- New analyzeFootnotes() (MCP): fence-aware pure scan reporting dangling
references, empty/duplicate definitions and `[^id]` markers inside table rows.
- createPage / updatePage / importPageMarkdown now attach `footnoteWarnings`
(only when non-empty) so an agent can fix its markup; the page is still created.
Paste-reuse:
- footnotePastePlugin remaps only ids the pasted slice DEFINES (a colliding
definition); a pasted lone reference to an existing id keeps it (reuse).
Tests: reuse/first-wins rewrites of footnote.test, footnote-markdown.test,
footnote.marked.orphan.test and the MCP footnotes.test; new footnote-paste.test
(editor-ext) and footnote-analyze.test (MCP). Deleted derive-id-parity.test.mjs
(the MCP no longer derives ids; editor-ext's deriveFootnoteId keeps its own
golden test). editor-ext 128, MCP 299, server roundtrip 2, client views 3,
client+server tsc clean.
Two review suggestions applied: corrected a stale "duplicated in MCP" comment and
the dangling-reference warning wording.
Note: the multi-backlink editor UI (a reused definition linking back to each of
its references) is deferred to a follow-up — this PR delivers the data-integrity
core (reuse + warnings + paste-reuse). Forward links and numbering already reuse
correctly; the backlink currently targets the first reference.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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