diff --git a/src/components/app/AppContent.tsx b/src/components/app/AppContent.tsx
index db42a378..42005c18 100644
--- a/src/components/app/AppContent.tsx
+++ b/src/components/app/AppContent.tsx
@@ -6,6 +6,7 @@ import Sidebar from '../sidebar/view/Sidebar';
 import MainContent from '../main-content/view/MainContent';
 import CommandPalette from '../command-palette/CommandPalette';
 import { useWebSocket } from '../../contexts/WebSocketContext';
+import { PaletteOpsProvider } from '../../contexts/PaletteOpsContext';
 import { useDeviceSettings } from '../../hooks/useDeviceSettings';
 import { useSessionProtection } from '../../hooks/useSessionProtection';
 import { useProjectsState } from '../../hooks/useProjectsState';
@@ -146,6 +147,7 @@ export default function AppContent() {
   }, []);
 
   return (
+    <PaletteOpsProvider>
     <div className="fixed inset-0 flex bg-background" style={{ bottom: 'var(--keyboard-height, 0px)' }}>
       {!isMobile ? (
         <div className="h-full flex-shrink-0 border-r border-border/50">
@@ -212,5 +214,6 @@ export default function AppContent() {
         onShowTab={setActiveTab}
       />
     </div>
+    </PaletteOpsProvider>
   );
 }
diff --git a/src/components/command-palette/CommandPalette.tsx b/src/components/command-palette/CommandPalette.tsx
index 9520974b..11ae12a4 100644
--- a/src/components/command-palette/CommandPalette.tsx
+++ b/src/components/command-palette/CommandPalette.tsx
@@ -13,6 +13,7 @@ import {
   DialogTitle,
 } from '../../shared/view/ui';
 import { useTheme } from '../../contexts/ThemeContext';
+import { usePaletteOps } from '../../contexts/PaletteOpsContext';
 import type { AppTab, Project } from '../../types/app';
 
 import { GROUPS, parseMode } from './registry';
@@ -35,6 +36,7 @@ export default function CommandPalette({
   const [search, setSearch] = React.useState('');
   const { toggleDarkMode } = useTheme();
   const navigate = useNavigate();
+  const ops = usePaletteOps();
 
   React.useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
@@ -60,8 +62,8 @@ export default function CommandPalette({
   }, []);
 
   const openFile = React.useCallback((path: string) => {
-    window.openFile?.(path);
-  }, []);
+    ops.openFile(path);
+  }, [ops]);
 
   const filter = React.useCallback(
     (value: string, rawSearch: string) => {
diff --git a/src/components/main-content/view/MainContent.tsx b/src/components/main-content/view/MainContent.tsx
index ba3d0840..a86dcbc9 100644
--- a/src/components/main-content/view/MainContent.tsx
+++ b/src/components/main-content/view/MainContent.tsx
@@ -7,6 +7,7 @@ import GitPanel from '../../git-panel/view/GitPanel';
 import PluginTabContent from '../../plugins/view/PluginTabContent';
 import type { MainContentProps } from '../types/types';
 import { useTaskMaster } from '../../../contexts/TaskMasterContext';
+import { usePaletteOpsRegister } from '../../../contexts/PaletteOpsContext';
 import { useTasksSettings } from '../../../contexts/TasksSettingsContext';
 import { useUiPreferences } from '../../../hooks/useUiPreferences';
 import { useEditorSidebar } from '../../code-editor/hooks/useEditorSidebar';
@@ -91,19 +92,12 @@ function MainContent({
     }
   }, [shouldShowTasksTab, activeTab, setActiveTab]);
 
-  // Expose file-open to non-descendant features (command palette).
-  useEffect(() => {
-    const open = (filePath: string) => {
+  usePaletteOpsRegister({
+    openFile: (filePath: string) => {
       setActiveTab('files');
       handleFileOpen(filePath);
-    };
-    window.openFile = open;
-    return () => {
-      if (window.openFile === open) {
-        delete window.openFile;
-      }
-    };
-  }, [handleFileOpen, setActiveTab]);
+    },
+  });
 
   if (isLoading) {
     return <MainContentStateView mode="loading" isMobile={isMobile} onMenuClick={onMenuClick} />;
diff --git a/src/contexts/PaletteOpsContext.tsx b/src/contexts/PaletteOpsContext.tsx
new file mode 100644
index 00000000..c26f6a0c
--- /dev/null
+++ b/src/contexts/PaletteOpsContext.tsx
@@ -0,0 +1,70 @@
+import { createContext, useCallback, useContext, useEffect, useMemo, useRef } from 'react';
+import type { ReactNode } from 'react';
+
+export type PaletteOps = {
+  openFile: (path: string) => void;
+  openSettings: (tab?: string) => void;
+  refreshProjects: () => Promise<void> | void;
+};
+
+type Handle = {
+  handlersRef: React.MutableRefObject<Partial<PaletteOps>>;
+  call: PaletteOps;
+};
+
+const PaletteOpsContext = createContext<Handle | null>(null);
+
+const noop = () => undefined;
+
+export function PaletteOpsProvider({ children }: { children: ReactNode }) {
+  const handlersRef = useRef<Partial<PaletteOps>>({});
+
+  const call = useMemo<PaletteOps>(
+    () => ({
+      openFile: (path) => handlersRef.current.openFile?.(path),
+      openSettings: (tab) => handlersRef.current.openSettings?.(tab),
+      refreshProjects: () => handlersRef.current.refreshProjects?.() ?? undefined,
+    }),
+    [],
+  );
+
+  const value = useMemo<Handle>(() => ({ handlersRef, call }), [call]);
+
+  return <PaletteOpsContext.Provider value={value}>{children}</PaletteOpsContext.Provider>;
+}
+
+export function usePaletteOps(): PaletteOps {
+  const handle = useContext(PaletteOpsContext);
+  if (!handle) {
+    return { openFile: noop, openSettings: noop, refreshProjects: noop };
+  }
+  return handle.call;
+}
+
+export function usePaletteOpsRegister(partial: Partial<PaletteOps>) {
+  const handle = useContext(PaletteOpsContext);
+  const openFile = partial.openFile;
+  const openSettings = partial.openSettings;
+  const refreshProjects = partial.refreshProjects;
+
+  const installer = useCallback(() => {
+    if (!handle) return undefined;
+    const prev = { ...handle.handlersRef.current };
+    if (openFile) handle.handlersRef.current.openFile = openFile;
+    if (openSettings) handle.handlersRef.current.openSettings = openSettings;
+    if (refreshProjects) handle.handlersRef.current.refreshProjects = refreshProjects;
+    return () => {
+      if (openFile && handle.handlersRef.current.openFile === openFile) {
+        handle.handlersRef.current.openFile = prev.openFile;
+      }
+      if (openSettings && handle.handlersRef.current.openSettings === openSettings) {
+        handle.handlersRef.current.openSettings = prev.openSettings;
+      }
+      if (refreshProjects && handle.handlersRef.current.refreshProjects === refreshProjects) {
+        handle.handlersRef.current.refreshProjects = prev.refreshProjects;
+      }
+    };
+  }, [handle, openFile, openSettings, refreshProjects]);
+
+  useEffect(() => installer(), [installer]);
+}
diff --git a/src/types/global.d.ts b/src/types/global.d.ts
index aea2538a..ba368e4b 100644
--- a/src/types/global.d.ts
+++ b/src/types/global.d.ts
@@ -5,7 +5,6 @@ declare global {
     __ROUTER_BASENAME__?: string;
     refreshProjects?: () => void | Promise<void>;
     openSettings?: (tab?: string) => void;
-    openFile?: (filePath: string) => void;
   }
 
   interface EventSourceEventMap {