Create @docmost/prosemirror-markdown — the single framework-free ProseMirror<->
Markdown converter + schema mirror that git-sync and mcp will both consume,
ending the three-hand-synced-copies drift (#293). This step only CREATES the
package (no consumer yet; git-sync untouched); the switch of git-sync and mcp
onto it, plus the canonical format decisions, come in later commits of this PR.
- packages/prosemirror-markdown/src/lib/: the 8 converter-core files copied
VERBATIM from packages/git-sync/src/lib (docmost-schema, markdown-converter,
markdown-to-prosemirror, canonicalize, markdown-document, node-ops, page-file,
index). Confirmed byte-identical — no behavioral drift introduced.
- src/index.ts barrel; package.json (@tiptap/* + jsdom/marked/zod, editor-ext
workspace devDep for the contract test); tsconfig/vitest configs.
- 24 converter-core test files + fixtures copied (engine-coupled layout/
redteam-layout-title tests correctly excluded — they import ../src/engine).
- pnpm-lock importer added; build/ gitignored (CI-built).
Verified (clean checkout, no network): pnpm --frozen-lockfile EXIT 0; tsc EXIT 0;
vitest 23 files, 443 passed | 1 expected-fail (the same image-diagrams
known-limitation carried from git-sync) — faithful extraction. git-sync untouched.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
claude code agent 227
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