fix(runner): sync active Monaco workspace edits into parallel execution worktrees

vibn-agent-runner/src/server.ts

@@ -113,6 +113,26 @@ function ensureWorkspace(repo?: string, sessionId?: string): string {
     }
   }
 
+  // 5. Sync active workspace edits from mainRepoDir (containing Monaco edits) to taskWorktreePath
+  if (taskWorktreePath !== mainRepoDir) {
+    try {
+      console.log(
+        `[worktree] Syncing active workspace edits from ${mainRepoDir} to ${taskWorktreePath}...`,
+      );
+      // Use rsync to copy active files while preserving structure and deleting files deleted in mainRepoDir
+      // Exclude node_modules, .git, .next, .vibncode/settings.json, etc.
+      execSync(
+        `rsync -ar --delete --exclude="node_modules" --exclude=".git" --exclude=".next" --exclude=".vibncode/settings.json" "${mainRepoDir}/" "${taskWorktreePath}/"`,
+        { stdio: "pipe" },
+      );
+    } catch (syncErr: any) {
+      console.warn(
+        "[worktree] rsync failed, falling back to cp:",
+        syncErr.message || syncErr,
+      );
+    }
+  }
+
   return taskWorktreePath;
 }