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feat(mcp): let MCP clients read and edit every project, not only the open one - #1040
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…open one v2 of the MCP server. A new `listProjects` tool returns every project with an `open` flag, and every agent tool takes an optional `projectId`: - omitted, or the open project's id: through the editor, exactly as before (revision-guarded apply, saved, one undo step). - any other id: read with DocumentService.getProject and saved with saveProject, the app's single instance and its per-project write queue. Works with no editor window at all. The open project is never written to disk from here, since the editor would overwrite it on its next save. For the file path, right before saving, the edit is refused if the editor has opened that project meanwhile or its file's updatedAt has moved. `projectId` is stripped before the executor sees it. Settings copy updated in all 15 locales; mcp-server.md documents the routing, the guard, and its remaining gaps (a small open-vs-save window, no undo for edits to closed projects, no create/rename/delete). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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🚧 Files skipped from review as they are similar to previous changes (3)
Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 6 remain after this review. 📝 WalkthroughWalkthroughThe MCP server now lists projects and accepts an optional project ID on agent tools. Calls for the open project use the editor; calls for other projects use ChangesMCP multi-project access
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant MCPClient
participant MCPServer
participant EditorHost
participant DocumentService
MCPClient->>MCPServer: Call an agent tool with projectId
MCPServer->>EditorHost: Read the open project snapshot
alt projectId matches open project
MCPServer->>EditorHost: Execute tool and apply using snapshot revision
else projectId identifies another project
MCPServer->>DocumentService: Load project document
MCPServer->>DocumentService: Save changed document after checks
end
Merge Risk: ⚪ Minimal · up to The change lets MCP clients list and edit any project. No concrete merge-blocking issue was identified; the author documents the known gaps, including the non-atomic save guard and no undo for closed projects. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 26.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 4 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @electron/mcp/openscreen-mcp-server.ts:
- Around line 198-213: In the execution flow, update the guard before
`saveProject` to compare the reread `onDisk` document with the initially loaded
`document`, in addition to checking `updatedAt`; return
`PROJECT_CHANGED_MESSAGE` if either differs so stale `execution.document` is not
saved.
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electron/ipc/handlers.tselectron/mcp/mcp-controller.test.tselectron/mcp/openscreen-mcp-server.test.tselectron/mcp/openscreen-mcp-server.tssrc/i18n/locales/ar/editor.jsonsrc/i18n/locales/cs/editor.jsonsrc/i18n/locales/de/editor.jsonsrc/i18n/locales/en/editor.jsonsrc/i18n/locales/es/editor.jsonsrc/i18n/locales/fr/editor.jsonsrc/i18n/locales/it/editor.jsonsrc/i18n/locales/ja-JP/editor.jsonsrc/i18n/locales/ko-KR/editor.jsonsrc/i18n/locales/pt-BR/editor.jsonsrc/i18n/locales/ru/editor.jsonsrc/i18n/locales/tr/editor.jsonsrc/i18n/locales/vi/editor.jsonsrc/i18n/locales/zh-CN/editor.jsonsrc/i18n/locales/zh-TW/editor.jsontechnical-documentation/architecture/mcp-server.md
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The guard against overwriting a closed project compared only `project.updatedAt`. Two saves inside one millisecond share that stamp, and a writer outside the app (a sync tool, a restored copy) may not change it, so an MCP edit could still land on top of either. Compare the re-read document in full instead. Raised by CodeRabbit on getopenscreen#1040. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Summary
v2 of the local MCP server (#893). Until now every MCP tool acted on the project open in the editor, and failed with "No project is open" otherwise. MCP clients can now list, read and edit any of the user's projects.
listProjectstool (read-only): every project's id, title,updatedAt, asset count, andopenfor the one in the editor.projectIdon every agent tool. It is added to each schema at registration and stripped before the executor sees it, so the tools stay identical to the in-app agent's.DocumentService.getProject, saved withsaveProject. That is the app's single instance, so its per-project write queue still holds. Works with no editor window at all.updatedAthas moved.technical-documentation/architecture/mcp-server.mddocuments the routing and the guard.Known gaps (also in the doc):
saveProject, not atomically with it. If the editor opens the project in those few milliseconds, it loads the old file and its next save drops the edit. Closing that would need a lock the editor takes on open.Related issue
Part of #893 (follow-up).
Type of change
Release impact
Desktop impact
Screenshots / video
Only the MCP settings section's text changes; the layout is unchanged.
Testing
electron/mcp/openscreen-mcp-server.test.ts: real HTTP with the SDK client, against a realDocumentServiceon a temp directory. New cases cover:openflagnpx tsc --noEmit,npx tsc -p tsconfig.test.json --noEmit,npm run lint,npm run i18n:check: clean.npm run test: 4191 passed, 1 skipped.npm run build-vite, launched aselectron .on Linux with a throwaway--user-data-dirholding copies of two real recorded projects), using the MCP SDK's HTTP client with the app's real token. 14/14 checks passed:listProjectsandprojectId(26 tools) are listed.projectIdreturns the "call listProjects" error; a closed project is read and edited by id, with the trim landing in its file; an unknown id is rejected.listProjectsflags it as open, and an edit by its id goes through the editor and is saved by it. Ctrl+Z in the editor undoes that MCP edit. An edit to the other, closed project lands in its file and leaves the open project untouched._electron.launchgetsbasic_textsafeStorage on Linux, so the token can't be stored and the server, correctly, refuses to start. The app has to be launched directly for this.🤖 Generated with Claude Code
Summary by CodeRabbit