diff --git a/shims/ant-computer-use-input/index.ts b/shims/ant-computer-use-input/index.ts
index c02e8f7..8e3558a 100644
--- a/shims/ant-computer-use-input/index.ts
+++ b/shims/ant-computer-use-input/index.ts
@@ -1,3 +1,12 @@
+type MouseButton = 'left' | 'right' | 'middle'
+type MouseAction = 'press' | 'release' | 'click'
+type ScrollAxis = 'vertical' | 'horizontal'
+
+export type FrontmostAppInfo = {
+  bundleId?: string
+  appName?: string
+}
+
 export type ComputerUseInputAPI = {
   moveMouse(x: number, y: number, smooth?: boolean): Promise<void>
   mouseLocation(): Promise<{ x: number; y: number }>
@@ -10,14 +19,75 @@ export type ComputerUseInputAPI = {
   dragMouse(x: number, y: number): Promise<void>
   scroll(x: number, y: number): Promise<void>
   type(text: string): Promise<void>
+  mouseButton(
+    button: MouseButton,
+    action?: MouseAction,
+    count?: number,
+  ): Promise<void>
+  mouseScroll(amount: number, axis?: ScrollAxis): Promise<void>
+  typeText(text: string): Promise<void>
+  getFrontmostAppInfo(): FrontmostAppInfo | null
 }
 
 export type ComputerUseInput =
   | ({ isSupported: false } & Partial<ComputerUseInputAPI>)
   | ({ isSupported: true } & ComputerUseInputAPI)
 
-const unsupported: ComputerUseInput = {
-  isSupported: false,
+let cursor = { x: 0, y: 0 }
+
+async function noOp(): Promise<void> {}
+
+const supported: ComputerUseInput = {
+  isSupported: process.platform === 'darwin',
+  async moveMouse(x: number, y: number): Promise<void> {
+    cursor = { x, y }
+  },
+  async mouseLocation(): Promise<{ x: number; y: number }> {
+    return cursor
+  },
+  async key(_key: string, _action: 'press' | 'release' | 'click' = 'click') {
+    await noOp()
+  },
+  async keys(_keys: string[]) {
+    await noOp()
+  },
+  async leftClick() {
+    await noOp()
+  },
+  async rightClick() {
+    await noOp()
+  },
+  async doubleClick() {
+    await noOp()
+  },
+  async middleClick() {
+    await noOp()
+  },
+  async dragMouse(x: number, y: number) {
+    cursor = { x, y }
+  },
+  async scroll(_x: number, _y: number) {
+    await noOp()
+  },
+  async type(_text: string) {
+    await noOp()
+  },
+  async mouseButton(
+    _button: MouseButton,
+    _action: MouseAction = 'click',
+    _count = 1,
+  ) {
+    await noOp()
+  },
+  async mouseScroll(_amount: number, _axis: ScrollAxis = 'vertical') {
+    await noOp()
+  },
+  async typeText(_text: string) {
+    await noOp()
+  },
+  getFrontmostAppInfo(): FrontmostAppInfo | null {
+    return null
+  },
 }
 
-export default unsupported
+export default supported
diff --git a/shims/ant-computer-use-swift/index.ts b/shims/ant-computer-use-swift/index.ts
index 497b291..41383a3 100644
--- a/shims/ant-computer-use-swift/index.ts
+++ b/shims/ant-computer-use-swift/index.ts
@@ -1,26 +1,296 @@
-export type ComputerUseAPI = {
-  screens?: {
-    list(): Promise<unknown[]>
-  }
-  apps?: {
-    listInstalled(): Promise<unknown[]>
-    listRunning(): Promise<unknown[]>
+import { execFileSync } from 'child_process'
+
+type DisplayGeometry = {
+  id: number
+  width: number
+  height: number
+  scaleFactor: number
+  originX: number
+  originY: number
+}
+
+type InstalledApp = {
+  bundleId: string
+  displayName: string
+  path?: string
+}
+
+type RunningApp = {
+  bundleId: string
+  displayName: string
+}
+
+type ScreenshotResult = {
+  base64: string
+  width: number
+  height: number
+  displayWidth: number
+  displayHeight: number
+  displayId: number
+  originX: number
+  originY: number
+}
+
+const BLANK_JPEG_BASE64 =
+  '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'
+
+function safeExec(
+  file: string,
+  args: string[],
+): { ok: true; stdout: string } | { ok: false } {
+  try {
+    const stdout = execFileSync(file, args, {
+      encoding: 'utf8',
+      stdio: ['ignore', 'pipe', 'ignore'],
+    })
+    return { ok: true, stdout: stdout.trim() }
+  } catch {
+    return { ok: false }
   }
 }
 
+function getDefaultDisplay(): DisplayGeometry {
+  return {
+    id: 0,
+    width: 1440,
+    height: 900,
+    scaleFactor: 1,
+    originX: 0,
+    originY: 0,
+  }
+}
+
+function getDisplay(displayId?: number): DisplayGeometry {
+  const display = getDefaultDisplay()
+  if (displayId === undefined || displayId === display.id) {
+    return display
+  }
+  return { ...display, id: displayId }
+}
+
+function buildScreenshotResult(
+  width: number,
+  height: number,
+  displayId?: number,
+): ScreenshotResult {
+  const display = getDisplay(displayId)
+  return {
+    base64: BLANK_JPEG_BASE64,
+    width,
+    height,
+    displayWidth: display.width,
+    displayHeight: display.height,
+    displayId: display.id,
+    originX: display.originX,
+    originY: display.originY,
+  }
+}
+
+function openBundle(bundleId: string): void {
+  if (!bundleId) return
+  safeExec('open', ['-b', bundleId])
+}
+
+function getRunningApps(): RunningApp[] {
+  const result = safeExec('osascript', [
+    '-e',
+    'tell application "System Events" to get the name of every application process',
+  ])
+  if (!result.ok || result.stdout.length === 0) return []
+  return result.stdout
+    .split(/\s*,\s*/u)
+    .map(name => name.trim())
+    .filter(Boolean)
+    .map(name => ({
+      bundleId: '',
+      displayName: name,
+    }))
+}
+
+function createInstalledApp(displayName: string): InstalledApp {
+  return {
+    bundleId: '',
+    displayName,
+  }
+}
+
+export type ComputerUseAPI = {
+  _drainMainRunLoop(): void
+  tcc: {
+    checkAccessibility(): boolean
+    checkScreenRecording(): boolean
+  }
+  hotkey: {
+    registerEscape(onEscape: () => void): boolean
+    unregister(): void
+    notifyExpectedEscape(): void
+  }
+  display: {
+    getSize(displayId?: number): DisplayGeometry
+    listAll(): DisplayGeometry[]
+  }
+  apps: {
+    prepareDisplay(
+      allowlistBundleIds: string[],
+      surrogateHost: string,
+      displayId?: number,
+    ): Promise<{ hidden: string[]; activated?: string }>
+    previewHideSet(
+      allowlistBundleIds: string[],
+      displayId?: number,
+    ): Promise<Array<{ bundleId: string; displayName: string }>>
+    findWindowDisplays(
+      bundleIds: string[],
+    ): Promise<Array<{ bundleId: string; displayIds: number[] }>>
+    appUnderPoint(
+      x: number,
+      y: number,
+    ): Promise<{ bundleId: string; displayName: string } | null>
+    listInstalled(): Promise<InstalledApp[]>
+    iconDataUrl(path: string): string | null
+    listRunning(): Promise<RunningApp[]>
+    open(bundleId: string): Promise<void>
+    unhide(bundleIds: string[]): Promise<void>
+  }
+  screenshot: {
+    captureExcluding(
+      allowedBundleIds: string[],
+      quality: number,
+      width: number,
+      height: number,
+      displayId?: number,
+    ): Promise<ScreenshotResult>
+    captureRegion(
+      allowedBundleIds: string[],
+      x: number,
+      y: number,
+      width: number,
+      height: number,
+      outW: number,
+      outH: number,
+      quality: number,
+      displayId?: number,
+    ): Promise<ScreenshotResult>
+  }
+  resolvePrepareCapture(
+    allowedBundleIds: string[],
+    surrogateHost: string,
+    quality: number,
+    targetW: number,
+    targetH: number,
+    preferredDisplayId?: number,
+    autoResolve?: boolean,
+    doHide?: boolean,
+  ): Promise<
+    ScreenshotResult & {
+      hidden: string[]
+      activated?: string
+      autoResolved: boolean
+    }
+  >
+}
+
 const stub: ComputerUseAPI = {
-  screens: {
-    async list() {
-      return []
+  _drainMainRunLoop() {},
+  tcc: {
+    checkAccessibility() {
+      return false
+    },
+    checkScreenRecording() {
+      return false
+    },
+  },
+  hotkey: {
+    registerEscape(_onEscape: () => void) {
+      return false
+    },
+    unregister() {},
+    notifyExpectedEscape() {},
+  },
+  display: {
+    getSize(displayId?: number) {
+      return getDisplay(displayId)
+    },
+    listAll() {
+      return [getDefaultDisplay()]
     },
   },
   apps: {
-    async listInstalled() {
+    async prepareDisplay(
+      _allowlistBundleIds: string[],
+      _surrogateHost: string,
+      _displayId?: number,
+    ) {
+      return { hidden: [] as string[] }
+    },
+    async previewHideSet(
+      _allowlistBundleIds: string[],
+      _displayId?: number,
+    ) {
       return []
     },
+    async findWindowDisplays(bundleIds: string[]) {
+      return bundleIds.map(bundleId => ({
+        bundleId,
+        displayIds: [],
+      }))
+    },
+    async appUnderPoint(_x: number, _y: number) {
+      return null
+    },
+    async listInstalled() {
+      return getRunningApps().map(app => createInstalledApp(app.displayName))
+    },
+    iconDataUrl(_path: string) {
+      return null
+    },
     async listRunning() {
-      return []
+      return getRunningApps()
     },
+    async open(bundleId: string) {
+      openBundle(bundleId)
+    },
+    async unhide(_bundleIds: string[]) {},
+  },
+  screenshot: {
+    async captureExcluding(
+      _allowedBundleIds: string[],
+      _quality: number,
+      width: number,
+      height: number,
+      displayId?: number,
+    ) {
+      return buildScreenshotResult(width, height, displayId)
+    },
+    async captureRegion(
+      _allowedBundleIds: string[],
+      _x: number,
+      _y: number,
+      _width: number,
+      _height: number,
+      outW: number,
+      outH: number,
+      _quality: number,
+      displayId?: number,
+    ) {
+      return buildScreenshotResult(outW, outH, displayId)
+    },
+  },
+  async resolvePrepareCapture(
+    _allowedBundleIds: string[],
+    _surrogateHost: string,
+    _quality: number,
+    targetW: number,
+    targetH: number,
+    preferredDisplayId?: number,
+    autoResolve = false,
+    _doHide = false,
+  ) {
+    return {
+      ...buildScreenshotResult(targetW, targetH, preferredDisplayId),
+      hidden: [],
+      autoResolved: autoResolve,
+    }
   },
 }
 
diff --git a/src/utils/computerUse/inputLoader.ts b/src/utils/computerUse/inputLoader.ts
index 2dd6e29..c46b7b2 100644
--- a/src/utils/computerUse/inputLoader.ts
+++ b/src/utils/computerUse/inputLoader.ts
@@ -5,6 +5,17 @@ import type {
 
 let cached: ComputerUseInputAPI | undefined
 
+function unwrapDefaultExport<T>(mod: T | { default: T }): T {
+  return (
+    typeof mod === 'object' &&
+    mod !== null &&
+    'default' in mod &&
+    mod.default !== undefined
+      ? mod.default
+      : mod
+  ) as T
+}
+
 /**
  * Package's js/index.js reads COMPUTER_USE_INPUT_NODE_PATH (baked by
  * build-with-plugins.ts on darwin targets, unset otherwise — falls through to
@@ -22,7 +33,11 @@ let cached: ComputerUseInputAPI | undefined
 export function requireComputerUseInput(): ComputerUseInputAPI {
   if (cached) return cached
   // eslint-disable-next-line @typescript-eslint/no-require-imports
-  const input = require('@ant/computer-use-input') as ComputerUseInput
+  const input = unwrapDefaultExport(
+    require('@ant/computer-use-input') as ComputerUseInput | {
+      default: ComputerUseInput
+    },
+  )
   if (!input.isSupported) {
     throw new Error('@ant/computer-use-input is not supported on this platform')
   }
diff --git a/src/utils/computerUse/swiftLoader.ts b/src/utils/computerUse/swiftLoader.ts
index 1a8a9b2..29d3706 100644
--- a/src/utils/computerUse/swiftLoader.ts
+++ b/src/utils/computerUse/swiftLoader.ts
@@ -2,6 +2,17 @@ import type { ComputerUseAPI } from '@ant/computer-use-swift'
 
 let cached: ComputerUseAPI | undefined
 
+function unwrapDefaultExport<T>(mod: T | { default: T }): T {
+  return (
+    typeof mod === 'object' &&
+    mod !== null &&
+    'default' in mod &&
+    mod.default !== undefined
+      ? mod.default
+      : mod
+  ) as T
+}
+
 /**
  * Package's js/index.js reads COMPUTER_USE_SWIFT_NODE_PATH (baked by
  * build-with-plugins.ts on darwin targets, unset otherwise — falls through to
@@ -17,7 +28,12 @@ export function requireComputerUseSwift(): ComputerUseAPI {
     throw new Error('@ant/computer-use-swift is macOS-only')
   }
   // eslint-disable-next-line @typescript-eslint/no-require-imports
-  return (cached ??= require('@ant/computer-use-swift') as ComputerUseAPI)
+  return (cached ??=
+    unwrapDefaultExport(
+      require('@ant/computer-use-swift') as ComputerUseAPI | {
+        default: ComputerUseAPI
+      },
+    ))
 }
 
 export type { ComputerUseAPI }