3d7f434b0c
A 10-agent red-team pass on the two-way Docmost<->git sync surfaced 16 ranked findings (9 others triaged out as already-defended). Wrote a reproduction test per finding (each asserts the CORRECT behavior, so it fails on the bug), then fixed the production code so every repro goes green. All confirmed bugs: Round-trip data loss (markdown-converter.ts + docmost-schema.ts mirror): - #1 editor-ext node types silently dropped on export — ported the 8 missing canon nodes (footnoteReference/footnotesList/footnoteDefinition, htmlEmbed, status, pageEmbed, transclusionSource/Reference) into the git-sync schema mirror and added converter cases that emit their schema-matching HTML instead of flattening unknown nodes to '' (this was the critical data-loss flagged in review #1679: footnotes/htmlEmbed lost on sync). Snapshot surface updated. - #2 top-level image lost width/height/align/attachmentId — now emits an HTML <img> (like video/diagrams) when it carries layout attrs; bare images stay . Image node parses width/height as strings so they re-import. - #3 code block containing a ``` fence corrupted on round-trip — outer fence is now widened to (longest-inner-backtick-run + 1). - #16 deep nesting threw RangeError (page never synced) — added a depth guard (MAX_NODE_DEPTH=400) so the converter never overflows the stack. Push/layout/cycle (engine): - #4 disambiguation ' ~slugId' suffix corrupted Docmost titles + order-dependent layout — deterministic, order-independent sibling disambiguation; suffix is stripped from a path-derived title ONLY when the new name is exactly the old title plus the suffix (never a genuine retitle ending in ' ~token'). - #6 retry-adopt by (parent,title) clobbered the wrong duplicate-title sibling — ambiguous (parent,title) is no longer adopted (falls back to fresh create). - #12 a new child under a new parent was created at ROOT — creates are ordered parent-before-child with an in-memory created-id map for parent resolution. - #13 git conflict markers could reach Docmost — bodies are scanned and the marker lines stripped (a '=======' line is only treated as a conflict separator inside a <<<<<<< ... >>>>>>> block, so setext headings are safe). - #15 a divergent `docmost` mirror was escalated by runPush but dropped by runCycle — RunCycleResult now forwards divergentDocmost to the orchestrator. Server (merge / lock / provenance): - #9 3-way merge lost a human's block edit when git inserted an adjacent block — finer-grained diff3 region merge (via lcs) preserves non-overlapping human edits; genuine same-block conflicts still resolve git-wins. - #10 single-writer race — module-static liveLocks closes the same-process TOCTOU window, and a heartbeat refresh that cannot confirm the lock now aborts the cycle at its next write checkpoint (cooperative AbortSignal threaded through runCycle). Cross-process fencing tokens remain a follow-up. - #14 sticky-agent provenance overrode an explicit actor='git-sync' write, blinding the listener loop-guard — resolveSource now lets an explicit actor win over the sticky-agent fallback (explicit agent still wins). Verified: git-sync vitest 617 pass (+1 expected-fail), server unit jest 1541 pass, server tsc clean. A review pass over the fixes caught and corrected a title-suffix over-strip, an inert abort signal, a document-wide conflict-marker strip, and two leaf-atom content-holes. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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