Computer Use

node_repl + @qwen-code/cua-sdk (Computer Use)

• Use node_repl (JavaScript) for all Computer Use actions.
• Do not use other technologies besides node_repl for computer interactions, unless specifically requested by the user (e.g. AppleScript, osascript, JXA, System Events, synthesized input).
• Prefer a dedicated plugin or skill when it can complete the task; use Computer Use for app interactions that are not exposed through a more specific interface.
• node_repl state is persistent across calls.
• For text output, use nodeRepl.write(...). nodeRepl.write(...) takes a string. If you would like to read a whole object, wrap it with JSON.stringify(...).

Bootstrap

If node_repl is unavailable, run:

qwen mcp add --scope user node-repl npx -y @qwen-code/node-repl-mcp@0.1.4
npm install --no-save --package-lock=false @qwen-code/cua-sdk@0.20.7

Tell the user to restart Qwen Code, then stop. If only the SDK import is missing, run the second command and retry.

Reuse an existing computer connected to the intended desktop. Otherwise import the ComputerUse API once per fresh node_repl session. Combine initialization, connected-platform discovery and the selected resource read in one call. Set skillBase to the absolute Skill base directory of this SKILL.md, as shown by the skill loader or the file you just read:

globalThis.computer = await (
  await import('@qwen-code/cua-sdk/computer-use')
).ComputerUse.create();
var platform = await computer.getPlatform();
var reference = {
  macos: 'macos.md',
  windows: 'windows-linux.md',
  linux: 'windows-linux.md',
}[platform];
if (!reference) throw new Error('Unsupported connected platform');
var skillBase = '/absolute/path/to/computer-use';
nodeRepl.write(`Connected platform: ${platform}`);
nodeRepl.write(
  await (
    await import('node:fs/promises')
  ).readFile(`${skillBase}/references/${reference}`, 'utf8'),
);

If the returned platform is macos and the task already identifies an unambiguous app, append its initial observation to that same initialization call, after printing the resource:

if (platform === 'macos') {
  var app = await computer.getApp('App named by the task');
  nodeRepl.write((await app.getState()).text);
}

Replace the example app name with the task's app. This only binds the app and reads its current state; getState() can open that app if stopped. Read both the returned platform workflow and initial state before any editing or input. If the app is unknown or ambiguous, omit this block and follow the selected resource's discovery steps. Do not guess an app or use the host platform.

Select the target platform workflow

Use this returned platform, not the CLI or Node host operating system. A connected driver may control a different machine. If the platform cannot be determined, resolve the reported driver/SDK error before continuing; do not guess a platform.

The initialization call above reads exactly one resource. If filesystem imports are unavailable, use the following fallback before any UI work. Read exactly one resource with read_file, resolving its absolute path from the Skill base directory shown above:

• macos: read references/macos.md for the App workflow and text operations.
• windows or linux: read references/windows-linux.md for the exact-window workflow.

Read the selected resource before taking actions. Once it has been printed in the initialization result, do not read it again. After changing the connected desktop, query its platform again and read the matching resource. Resource files remain on the machine hosting this Skill; do not look for them on the controlled desktop.