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Dayuan Jiang
77be43d996
* feat(mcp-server): list and resume saved diagram sessions start_session accepts an optional session_id to continue a saved diagram under the same preview URL and auto-save file, reporting the restored pages. New read-only tool list_saved_diagrams prints every auto-saved file newest first with its pages. Autosaver gains list() and dataDir(). INSTRUCTIONS and both READMEs mention the new tool. * feat(mcp-server): add restore_version tool for undo and redo from History Add the restore_version write tool so the model can put an earlier version from History back on the canvas (steps_back, default 1). The current canvas is kept in History unless it is the blank page, so a redo is possible. http-server.ts exports restoreHistoryEntry, shared by the HTTP restore endpoint and the tool; history.ts exports HistoryEntry and otherVersions (distinct versions other than the canvas, newest first). The drawing guide tells the model to call restore_version when the user asks to undo, and both READMEs document the tool. * feat(mcp-server): save the diagram History next to the auto-saved file The Autosaver writes each session's History (the XML of its last 20 versions, without thumbnails) to <session-id>.history.json beside the .drawio file, after the same 1 second delay and only when the entries changed. When a saved session is resumed after an idle timeout or a process restart, the saved History is loaded back before the diagram, so the History panel and restore_version keep working. Removing the oldest files also removes their History files. * fix(mcp-server): review fixes for saved sessions, undo tool, history on disk * fix(mcp-server): Codex review fixes for saved sessions, undo and History on disk - start_session resumes every saved file, also a cleared one or one of empty named pages, and decompresses pages draw.io compressed - History kept by a lost user edit or a recovering tab is saved too - A diagram cleared before its first save keeps its History on disk - The History file is written again after the 50-file cap removed it - restore_version compares versions like the edit gate (a bare mxGraphModel from the browser has no page name), checks the restore result, and says "none" when no version is left - The preview closes an open History list when the server state was recreated, since the entries got new ids - start_session's description mentions session_id * fix(mcp-server): compare History versions pairwise and tie restores to the server state Second Codex review of the History fixes: - One bare mxGraphModel in History no longer hides page renames in every comparison: names are left out only when one of the two is bare - A History list asked for before the server recreated the session is dropped, and a restore names the state its list belongs to; the server refuses one from a lost state (History ids change after a restart) * fix(mcp-server): restore from a History list with the state it was taken in Third Codex review: a restore sent the tab's current state, so an old list shown after a failed refresh passed the server's check. The list now keeps the state it came from, and the server refuses a missing (null) state too; only a tab of an older version, which sends none, is let through.