Let the AI test your game

An AI that edits a scene should also check the result. nanora-unity-mcp gives it Playwright-style tools for that, all driven by U-Selector queries such as #ScoreText or .Enemy[tag=Boss].

Step by step

Step	Tool
Enter or leave Play Mode	manage_playmode
Wait until an object exists, is visible or interactable	wait_for_selector
Press keys, click, drag, click a UI element	simulate_input
Check text, active state, color, value…	assert_ui_state
See the result	capture_screenshot

Simulated keys need the Input System package; the legacy Input Manager does not receive them. With Input System 1.4 or later keys arrive even while Unity is in the background.

One scenario, one call

run_e2e_test runs a list of steps in Play Mode and returns pass/fail per step. Step actions are wait_for_selector, simulate_input, assert, screenshot, wait and execute_csharp. It enters and leaves Play Mode for you and takes a screenshot when a step fails.

{
  "name": "run_e2e_test",
  "arguments": {
    "name": "start and score",
    "steps": [
      { "action": "wait_for_selector", "selector": "#StartButton" },
      { "action": "simulate_input", "input_action": "ui_click", "selector": "#StartButton" },
      { "action": "simulate_input", "input_action": "key_tap", "key": "Space" },
      { "action": "wait", "ms": 500 },
      { "action": "assert", "selector": "#ScoreText", "property": "text", "comparison": "not_equals", "expected": "0" },
      { "action": "screenshot", "label": "after-shot" }
    ]
  }
}

The object names here are an example; use the ones in your scene.

Beyond a single run

• visual_regression_test compares a screenshot with a saved baseline.
• performance_budget_test checks FPS, draw calls and memory against a budget.
• run_tests and get_test_results run your Unity Test Framework tests.
• generate_test_report writes the results up as a report.

Screenshots without the UI?

The game-view capture renders the camera, so Screen Space - Overlay canvases are not in it. Use Screen Space - Camera for UI you want the AI to see.