Make your coding agent prove the feature works: ask it to build the change, then open the app itself (even the iPhone simulator), click through it and show you the result before it hands the work back: AI agent prompt
AI coding agents often hand back code that was never actually run. On Oct 23, 2026 Cursor announced Computer Use for its agents: they can click and type in desktop apps on your computer, including Apple's iOS Simulator, so they can test the features they build. Cursor says agents use it on their own when a task needs it, or when you @-mention Computer Use in your prompt. Its demo shows an agent adding a 'favorite trails' feature to a hiking app, launching it in an iPhone simulator and tapping through it. The useful habit for anyone building with AI: give the agent a clear pass/fail check and ask it to demo the result, so you find problems before you ship.
CodingTesting & QAbeginnerThe prompt
Build this change: [DESCRIBE THE FEATURE IN PLAIN WORDS, e.g. 'let users favorite a trail and see favorites on a new tab']. Before you tell me you're done, test it yourself in the running app [web browser / iOS Simulator / desktop app] using computer use. Pass/fail checks: 1) [FIRST THING A USER DOES AND WHAT SHOULD HAPPEN] 2) [SECOND CHECK] 3) [AN EDGE CASE, e.g. what happens with no favorites yet]. For each check, tell me PASS or FAIL, what you clicked, and include a screenshot. If anything fails, fix it and re-run all checks. Don't change unrelated files, and don't sign in to real accounts or touch real customer data while testing. Finish with a short summary of what changed and anything you couldn't test.
How to use it
- Copy the prompt above.
- Replace every [bracket] with your own details (or fill in the blanks on AgentPlaybook Real Estate, which remembers your answers for the next prompt).
- Paste it into Cursor (Computer Use), iOS Simulator, web browser and review the answer before you use it.
Works with: Cursor (Computer Use), iOS Simulator, web browser
Real-world example: x.com/cursor_ai/status/2113661506634305834
Featured in: Free AI agent prompts for small business (beginner-friendly)
Before you use it: what to check
Already built into this prompt
- Don't change unrelated files, and don't sign in to real accounts or touch real customer data while testing.
Check yourself
- Remove names, contact details, account numbers and other personal data the task doesn't need before you paste, and check your AI tool's data and training settings.
- Read and edit the draft before it reaches a customer or goes public. If you later automate this prompt, start with "draft and notify me", not "send automatically".
- Check names, dates, numbers and any claim against your own source material before you use the answer. AI can misread or invent details.
Using an AI agent? Download this prompt as a SKILL.md agent skill with these checks built in, or get the .zip for Claude.ai. How to install skills.
Want to make this prompt even better? Grade it with the free prompt grader or build your own with the AI prompt generator.
32 copy-paste agent prompts (PDF) plus 5 new prompts every week.
Get it free