Unity Scene Skill for Claude

Unity Scene Skills

Control Unity scenes - the containers that hold all your GameObjects.

Operating Mode

• Approval：本模块 Mixed —— scene_get_info / scene_get_hierarchy / scene_get_loaded / scene_find_objects 标 SkillMode.SemiAuto，可直接执行；scene_screenshot / scene_unload / scene_set_active 未设 Mode 字段（默认 FullAuto），Approval 模式下需 grant。
• Auto / Bypass：FullAuto 直接执行。
• 含 NeverInSemi 高危 skill：scene_create / scene_load / scene_save（标 RiskLevel="high"，因为切换/覆盖整个场景文件影响范围极大）。这些在 Approval/Auto 下返 MODE_FORBIDDEN，仅 Bypass 或 Allowlist 命中可调。

DO NOT (common hallucinations):

• scene_delete / scene_rename do not exist → delete scene files via asset_delete, rename via asset_move
• scene_list does not exist → use scene_get_loaded (loaded scenes) or asset_find with t:Scene (all scene assets)
• scene_find_objects is a simple name/tag/component filter; for regex/layer/path search use gameobject_find (SkillMode.FullAuto)

Routing:

• For detailed hierarchy tree → use perception module's hierarchy_describe
• For scene statistics → use perception module's scene_summarize
• For screenshot → scene_screenshot (this module) captures the Game View final composited image (all cameras + UI; in Play mode this is the live runtime frame); camera_screenshot (camera module, SkillMode.FullAuto) renders a single Game Camera off-screen

Skills Overview

| Skill | Description |

|-------|-------------|

| scene_create | Create a new scene |

| scene_load | Load a scene |

| scene_save | Save current scene |

| scene_get_info | Get scene information |

| scene_get_hierarchy | Get hierarchy tree |

| scene_screenshot | Capture screenshot |

| scene_get_loaded | Get all loaded scenes |

| scene_unload | Unload an additive scene |

| scene_set_active | Set active scene |

| scene_find_objects | Search objects by name/tag/component |

Skills

scene_create

Create a new scene.

| Parameter | Type | Required | Description |

|-----------|------|----------|-------------|

| scenePath | string | Yes | Path for new scene (e.g., "Assets/Scenes/MyScene.unity") |

scene_load

Load a scene.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| scenePath | string | Yes | - | Scene asset path |

| additive | bool | No | false | Load additively (keep current scene) |

scene_save

Save the current scene.

| Parameter | Type | Required | Description |

|-----------|------|----------|-------------|

| scenePath | string | No | Save path (null = save current) |

scene_get_info

Get current scene information.

No parameters.

Returns: {success, name, path, isDirty, rootObjectCount, rootObjects: [name]}

scene_get_hierarchy

Get full scene hierarchy tree.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| maxDepth | int | No | 10 | Maximum hierarchy depth |

Returns: {success, hierarchy: [{name, instanceId, children: [...]}]}

scene_screenshot

Capture a screenshot of the Game View — the final composited frame of all cameras + UI. In Play mode this is the live runtime image, not the Scene/editor view. For a single Game Camera's render use camera_screenshot instead.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| filename | string | No | "screenshot.png" | Bare filename only (no path separators); saved under Assets/Screenshots/ |

| width | int | No | 1920 | Image width |

| height | int | No | 1080 | Image height |

| returnImage | bool | No | false | Also return a PNG as base64 in the response (imageBase64), for clients without filesystem access |

| maxDimension | int | No | 1280 | Only used when returnImage=true; downscales the returned image (not the saved file) so its longer edge is ≤ this value. Clamped to 256–4096 |

Returns: {success, path, width, height, isPlaying, note}. isPlaying indicates whether the frame is a live runtime image (Play mode) or a static Edit-mode frame. Adds {imageBase64, imageWidth, imageHeight, imageBytes} when returnImage=true. If the base64 payload would exceed 8MB, the skill returns an error asking for a smaller maxDimension — the file at path is still saved.

Async: ScreenCapture.CaptureScreenshot writes the PNG ~1 frame later. If reading path immediately fails, wait ~200ms and retry. returnImage does not read that file back — since it isn't written yet — it instead does a separate synchronous capture of the Game View's current backbuffer (ScreenCapture.CaptureScreenshotAsTexture), so the returned image may be a moment older than the file eventually written to path.

returnImage usage tip: a local agent that can read files (e.g. Claude Code against a local Unity Editor) should generally omit returnImage and just read the PNG at path once it's written — it's cheaper on tokens. Use returnImage=true for remote/MCP clients that have no filesystem access to the Unity project.

scene_get_loaded

Get list of all currently loaded scenes.

No parameters.

Returns: {success, scenes: [{name, path, isActive, isDirty}]}

scene_unload

Unload a loaded scene (additive).

| Parameter | Type | Required | Description |

|-----------|------|----------|-------------|

| sceneName | string | Yes | Scene name to unload |

scene_set_active

Set the active scene (for multi-scene editing).

| Parameter | Type | Required | Description |

|-----------|------|----------|-------------|

| sceneName | string | Yes | Scene name to set active |

scene_find_objects

Search GameObjects by name pattern, tag, or component type. For advanced search (regex, layer, path) use gameobject_find.

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| namePattern | string | No | - | Name substring to match (case-insensitive) |

| tag | string | No | - | Filter by tag |

| componentType | string | No | - | Filter by component type name |

| limit | int | No | 50 | Max results to return |

Returns: {success, count, objects: [{name, path, instanceId, active, tag}]}

Example Usage

import unity_skills

# Create a new scene
unity_skills.call_skill("scene_create", scenePath="Assets/Scenes/Level1.unity")

# Load an existing scene
unity_skills.call_skill("scene_load", scenePath="Assets/Scenes/MainMenu.unity")

# Load scene additively (multi-scene)
unity_skills.call_skill("scene_load", scenePath="Assets/Scenes/UI.unity", additive=True)

# Get current scene info
info = unity_skills.call_skill("scene_get_info")
print(f"Scene: {info['name']}, Objects: {info['rootObjectCount']}")

# Get full hierarchy (useful for understanding scene structure)
hierarchy = unity_skills.call_skill("scene_get_hierarchy", maxDepth=5)

# Save scene
unity_skills.call_skill("scene_save")

# Take screenshot
unity_skills.call_skill("scene_screenshot", filename="preview.png", width=1920, height=1080)

Best Practices

• Always save before loading a new scene
• Use additive loading for UI overlays
• Keep scene hierarchy organized with empty parent objects
• Use scene_get_info to verify scene state
• Screenshots are saved under Assets/Screenshots/ (filename is a bare name; any path separators are stripped)

Exact Signatures

Exact names, parameters, defaults, and returns are defined by GET /skills/schema or unity_skills.get_skill_schema(), not by this file.