feat(mcp): local MCP server exposing the wiki to AI clients - #127
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Included review availability: 3 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughAdded a local WordyMe MCP server for Claude integrations. The server authenticates with WordyMe, converts Markdown through Lexical editor state, and provides tools for browsing, searching, reading, creating, updating, and moving documents. ChangesMCP server integration
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to This PR adds a local MCP integration for searching, reading, writing, and organizing wiki content while preserving revision history and leaving the shipped application unchanged; no actionable merge-blocking risk remains. Sequence Diagram(s)sequenceDiagram
participant Claude
participant MCPStdioServer
participant Auth
participant WordyMeAPI
Claude->>MCPStdioServer: Invoke an MCP document tool
MCPStdioServer->>Auth: Ensure authentication
Auth->>WordyMeAPI: Sign in with configured credentials
WordyMeAPI-->>Auth: Return authentication token
Auth-->>MCPStdioServer: Configure authenticated client
MCPStdioServer->>WordyMeAPI: Execute document operation
WordyMeAPI-->>MCPStdioServer: Return document or revision data
MCPStdioServer-->>Claude: Return JSON result
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@apps/mcp/package.json`:
- Line 8: Update the package engine and runtime declarations associated with the
start script to require Node.js 22.9.0 or newer, ensuring the node
--env-file-if-exists invocation is only supported on compatible versions.
In `@MCP.md`:
- Around line 29-31: Limit the revision guarantee in MCP.md (lines 29-31),
README.md (lines 191-193), and apps/mcp/README.md to content writes, since
move_document only updates parentId and position without creating a revision.
Keep the wording consistent across all three documents; do not add move revision
tracking unless required to preserve the stated guarantee.
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📒 Files selected for processing (16)
.dockerignore.mcp.jsonMCP.mdREADME.mdapps/mcp/.env.exampleapps/mcp/README.mdapps/mcp/eslint.config.jsapps/mcp/package.jsonapps/mcp/scripts/smoke-markdown.tsapps/mcp/src/auth.tsapps/mcp/src/dom-shim.tsapps/mcp/src/env.d.tsapps/mcp/src/index.tsapps/mcp/src/markdown.tsapps/mcp/tsconfig.jsonpackages/sdk/src/app/client.ts
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Summary
Adds an MCP (Model Context Protocol) server, so Claude
Code and Claude Desktop can work with a WordyMe wiki: search it, read pages, create notes,
revise them, and move them between folders — all in Markdown.
Content crosses the boundary through the editor's own Markdown transformers, running in
a headless copy of the editor. There is no bespoke translation layer: what Claude writes is
what the editor itself would produce if you typed the same Markdown, so headings, lists,
tables, code blocks and Mermaid diagram fences become real rich-text nodes.
Three design decisions worth stating up front:
sharing model — an "AI account" would see an empty wiki. The server signs in with the
owner's credentials and acts as that account, the way any connected app does. The
single-admin bootstrap trigger is untouched.
visible and restorable in Revisions History. No tool deletes anything.
apps/mcpisexcluded from the Docker build context and no shipped workspace depends on it — verified
by inspecting the built image (below).
Related Issues
None.
Type of Change
New feature.
Changes
apps/mcp(@repo/mcp), private, run withpnpm --filter @repo/mcp start.It bundles with esbuild and speaks MCP over stdio.
packages/sdk:list_spaces,list_documents,search_documents,read_document,create_note,update_document,move_document.src/markdown.ts— the conversion seam. A headless Lexical editor built fromeditorConfig(packages/editor/src/config.ts) with the app's owncreateTransformers()(packages/editor/src/plugins/MarkdownPlugin). Reads and writestarget the
page-contentnodes inside the editor's page scaffold, and new notes startfrom
getInitialEditorState()— so MCP-created documents are structurally identical toones created in the editor.
src/dom-shim.ts— several editor nodes (MathLive in particular) touch browserglobals at import time, so a headless DOM is registered before any editor module loads.
Node's own
fetchis restored immediately afterwards: the shim's browserfetchenforces the same-origin policy and blocked every API call.
src/auth.ts— signs in against the backend's existing Better Authbearer()pluginand reuses the returned token. A 401 triggers one transparent re-login and retry.
Sign-in deliberately uses plain Node HTTP rather than global
fetch:fetchaddsSec-Fetch-*headers, which make Better Auth's CSRF guard treat the call as a browserform submission and reject it with
MISSING_OR_NULL_ORIGIN.move_documentmirrors the app's own drag-and-drop (parentId+ a fresh sortposition via
generatePositionKeyBetween) and refuses moves that would corrupt the tree:into a note rather than a folder, into itself or a descendant, or into an unknown id.
.mcp.jsonat the repo root registers the server for Claude Code with no secrets init. Credentials live in
apps/mcp/.env(git-ignored,.env.exampleprovided), read atstartup via Node's
--env-file-if-exists.MCP.mdat the root (what it does, three-step setup, honest limits,roadmap), linked from the README; implementation notes in
apps/mcp/README.md.apps/mcp:packages/sdk/src/app/client.tsnow readsimport.meta.env?.VITE_BACKEND_URL— optional chaining, because that property does notexist under Node and the bare access crashes at module load. Verified not to change the
browser bundle (below).
How to Test
No test harness in the repo yet, so this is manual. Requires a running WordyMe.
pnpm --filter @repo/mcp smokeround-tripsa sample with headings, a list, a table, a code fence and a Mermaid fence, and asserts
the editor's page scaffold is produced.
cp apps/mcp/.env.example apps/mcp/.envand fill it in.WORDYME_URLishttp://localhost:3000forpnpm dev,http://localhost:8080for Docker.wordymeserver, or addthe Claude Desktop snippet from
MCP.md. Then ask it to list your Spaces.come back as faithful Markdown.
note in WordyMe: it renders as rich content, the diagram draws, and Revisions History
shows "via Claude".
restorable.
pnpm lint && pnpm check-types && pnpm build && pnpm lint:md && pnpm license:check— all clean.Expected result: Claude can search, read, write, revise and organise the wiki in
Markdown, as the owner's account, with every change recorded as a restorable "via Claude"
revision — and the shipped application and Docker image behave exactly as before.
Verification already performed
Beyond the CI gates (all run locally and green, including the Docker image build and stack
health check):
apps/mcpfiles and no@modelcontextprotocolpackage. Container reports healthy,/api/health→ 200.(Built on
linux/arm64; CI coversamd64.)baseURL: "/api", identical to before the change.nested headings and a box-drawing code block.
backend's real
401 Invalid email or password), and all threemove_documentguards.Known limits
(```mermaid) round-trip; sketches, scores and stickies degrade to plain text when read.
/mcpendpoint, with OAuth viaBetter Auth so tokens are revocable and scopable, is outlined as future work in
MCP.md.Summary by CodeRabbit
New Features
Documentation
Bug Fixes
import.meta.env.