diff --git a/src/main/input/command-executor.test.ts b/src/main/input/command-executor.test.ts
index 9eede59..8855ed0 100644
--- a/src/main/input/command-executor.test.ts
+++ b/src/main/input/command-executor.test.ts
@@ -121,7 +121,9 @@ describe('DesktopCommandExecutor', () => {
     const { adapter, executor, overlay } = createExecutor();
 
     await executor.execute(command('keyboard.key', { key: 'Enter' }));
+    await executor.execute(command('keyboard.key', { key: 'F12' }));
     await executor.execute(command('keyboard.shortcut', { keys: ['Ctrl', 'C'] }));
+    await executor.execute(command('keyboard.shortcut', { keys: ['Ctrl', 'F5'] }));
     await executor.execute(command('keyboard.typeText', { text: 'Hello' }));
     await executor.execute(command('media.control', { action: 'playPause' }));
     await executor.execute(command('window.control', { action: 'switchNext' }));
@@ -130,14 +132,16 @@ describe('DesktopCommandExecutor', () => {
     expect(pingResult).toEqual({ ok: true });
     expect(adapter.calls).toEqual([
       { method: 'pressKey', args: ['Enter'] },
+      { method: 'pressKey', args: ['F12'] },
       { method: 'pressShortcut', args: [['Ctrl', 'C']] },
+      { method: 'pressShortcut', args: [['Ctrl', 'F5']] },
       { method: 'typeText', args: ['Hello'] },
       { method: 'mediaControl', args: ['playPause'] },
       { method: 'controlWindow', args: ['switchNext'] }
     ]);
     expect(overlay.events).toHaveLength(0);
     expect(overlay.activeCount).toBe(0);
-    expect(overlay.hideCount).toBe(6);
+    expect(overlay.hideCount).toBe(8);
   });
 
   it('executes non-movement no-response commands without coalescing', async () => {
@@ -145,13 +149,13 @@ describe('DesktopCommandExecutor', () => {
 
     await executor.execute(command('mouse.click', { button: 'left' }, { responseMode: 'none' }));
     await executor.execute(command('mouse.scroll', { dx: 0, dy: -3 }, { responseMode: 'none' }));
-    await executor.execute(command('keyboard.key', { key: 'Enter' }, { responseMode: 'none' }));
+    await executor.execute(command('keyboard.key', { key: 'F12' }, { responseMode: 'none' }));
     await executor.execute(command('window.control', { action: 'switchNext' }, { responseMode: 'none' }));
 
     expect(adapter.calls).toEqual([
       { method: 'clickMouse', args: ['left'] },
       { method: 'scrollMouse', args: [{ dx: 0, dy: -3 }] },
-      { method: 'pressKey', args: ['Enter'] },
+      { method: 'pressKey', args: ['F12'] },
       { method: 'controlWindow', args: ['switchNext'] }
     ]);
     expect(overlay.events).toEqual(['click']);
diff --git a/src/main/input/libnut-win32-adapter.test.ts b/src/main/input/libnut-win32-adapter.test.ts
index 722ba76..9ff089e 100644
--- a/src/main/input/libnut-win32-adapter.test.ts
+++ b/src/main/input/libnut-win32-adapter.test.ts
@@ -1,5 +1,10 @@
 import { describe, expect, it } from 'vitest';
-import { calculateNativeScrollDelta, calculateScaledMouseTarget, toLibnutMouseToggle } from './libnut-win32-adapter';
+import {
+  calculateNativeScrollDelta,
+  calculateScaledMouseTarget,
+  toLibnutKeyboardKey,
+  toLibnutMouseToggle
+} from './libnut-win32-adapter';
 import {
   createWindowControlScript,
   toWindowsWindowControlStrategy
@@ -90,6 +95,17 @@ describe('toLibnutMouseToggle', () => {
   });
 });
 
+describe('toLibnutKeyboardKey', () => {
+  it('maps navigation keys to libnut key values', () => {
+    expect(toLibnutKeyboardKey('PageUp')).toBe('pageup');
+  });
+
+  it('maps function keys to libnut key values', () => {
+    expect(toLibnutKeyboardKey('F1')).toBe('f1');
+    expect(toLibnutKeyboardKey('F12')).toBe('f12');
+  });
+});
+
 describe('toWindowsWindowControlStrategy', () => {
   it('leaves app switching on the known-good libnut path', () => {
     expect(toWindowsWindowControlStrategy('switchNext')).toBeNull();
diff --git a/src/main/input/libnut-win32-adapter.ts b/src/main/input/libnut-win32-adapter.ts
index 69fdbf5..1d8f409 100644
--- a/src/main/input/libnut-win32-adapter.ts
+++ b/src/main/input/libnut-win32-adapter.ts
@@ -53,17 +53,17 @@ export class LibnutWin32InputAdapter implements DesktopInputAdapter {
   }
 
   async pressKey(key: KeyboardKey): Promise<void> {
-    keyTap(toLibnutKey(key));
+    keyTap(toLibnutKeyboardKey(key));
   }
 
   async pressShortcut(keys: ShortcutKey[]): Promise<void> {
     if (keys.length === 1) {
-      keyTap(toLibnutKey(keys[0]));
+      keyTap(toLibnutKeyboardKey(keys[0]));
       return;
     }
 
     const [key, ...modifiers] = [...keys].reverse();
-    keyTap(toLibnutKey(key), modifiers.map(toLibnutKey));
+    keyTap(toLibnutKeyboardKey(key), modifiers.map(toLibnutKeyboardKey));
   }
 
   async typeText(text: string): Promise<void> {
@@ -150,7 +150,7 @@ function toLibnutMouseButton(button: MouseButton): string {
   }
 }
 
-function toLibnutKey(key: KeyboardKey | ShortcutKey): string {
+export function toLibnutKeyboardKey(key: KeyboardKey | ShortcutKey): string {
   switch (key) {
     case 'Backspace':
       return 'backspace';
@@ -180,6 +180,19 @@ function toLibnutKey(key: KeyboardKey | ShortcutKey): string {
       return 'pageup';
     case 'PageDown':
       return 'pagedown';
+    case 'F1':
+    case 'F2':
+    case 'F3':
+    case 'F4':
+    case 'F5':
+    case 'F6':
+    case 'F7':
+    case 'F8':
+    case 'F9':
+    case 'F10':
+    case 'F11':
+    case 'F12':
+      return key.toLowerCase();
     case 'Ctrl':
       return 'control';
     case 'Alt':
diff --git a/src/shared/protocol.test.ts b/src/shared/protocol.test.ts
index c55e33f..3f4bd73 100644
--- a/src/shared/protocol.test.ts
+++ b/src/shared/protocol.test.ts
@@ -33,6 +33,9 @@ describe('protocol request validation', () => {
       { type: 'mouse.dragEnd', payload: { button: 'left' } },
       { type: 'keyboard.key', payload: { key: 'Enter' } },
       { type: 'keyboard.shortcut', payload: { keys: ['Ctrl', 'C'] } },
+      { type: 'keyboard.key', payload: { key: 'F1' } },
+      { type: 'keyboard.key', payload: { key: 'F12' } },
+      { type: 'keyboard.shortcut', payload: { keys: ['Ctrl', 'F5'] } },
       { type: 'keyboard.typeText', payload: { text: 'Hello' } },
       { type: 'media.control', payload: { action: 'playPause' } },
       { type: 'window.control', payload: { action: 'switchNext' } },
@@ -196,6 +199,10 @@ describe('protocol request validation', () => {
       ok: false,
       error: 'invalid_payload'
     });
+    expect(validateProtocolRequest({ ...baseCommand, type: 'keyboard.key', payload: { key: 'F13' } })).toMatchObject({
+      ok: false,
+      error: 'invalid_payload'
+    });
     expect(validateProtocolRequest({ ...baseCommand, type: 'keyboard.typeText', payload: { text: 'x'.repeat(2_001) } })).toMatchObject({
       ok: false,
       error: 'invalid_payload'
diff --git a/src/shared/protocol.ts b/src/shared/protocol.ts
index c0e20f4..fa8178c 100644
--- a/src/shared/protocol.ts
+++ b/src/shared/protocol.ts
@@ -31,7 +31,19 @@ export type KeyboardKey =
   | 'Home'
   | 'End'
   | 'PageUp'
-  | 'PageDown';
+  | 'PageDown'
+  | 'F1'
+  | 'F2'
+  | 'F3'
+  | 'F4'
+  | 'F5'
+  | 'F6'
+  | 'F7'
+  | 'F8'
+  | 'F9'
+  | 'F10'
+  | 'F11'
+  | 'F12';
 
 export type ShortcutKey =
   | KeyboardKey
@@ -241,7 +253,19 @@ const keyboardKeys = new Set<KeyboardKey>([
   'Home',
   'End',
   'PageUp',
-  'PageDown'
+  'PageDown',
+  'F1',
+  'F2',
+  'F3',
+  'F4',
+  'F5',
+  'F6',
+  'F7',
+  'F8',
+  'F9',
+  'F10',
+  'F11',
+  'F12'
 ]);
 const shortcutKeys = new Set<ShortcutKey>([
   ...keyboardKeys,