unity-cleaner

name	unity-cleaner
description	Clean up and audit a Unity project — find unused assets, content-hash duplicates, missing references, and empty folders. Use when reducing project bloat, hunting duplicate or orphaned assets, or auditing before a release, even if the user just says "清理项目" or "瘦身". 清理与审计 Unity 工程(查找未使用资源、内容哈希重复项、丢失引用、空文件夹);当用户要给项目瘦身、排查重复或孤立资源、或发布前审计时使用。

Unity Cleaner Skills

Safety: cleaner_delete_assets uses a two-step confirmToken handshake. Call without confirmToken to preview; call again with the returned token (5-minute TTL) to actually delete. There is no dryRun parameter.

Guardrails

Operating Mode (v1.9 three-tier):

• Approval (default): all analyze/query skills (cleaner_find_unused_assets, cleaner_find_duplicates, cleaner_find_missing_references, cleaner_get_asset_usage, cleaner_find_empty_folders, cleaner_find_large_assets, cleaner_get_dependency_tree) are SemiAuto — run directly.
• Auto / Bypass: SemiAuto and FullAuto run directly.
• Auto-forbidden in this module: cleaner_delete_assets, cleaner_delete_empty_folders (both carry SkillOperation.Delete). In Approval/Auto these return MODE_FORBIDDEN — they are reachable only under Bypass mode or via a user-managed Allowlist entry; the grant flow does not unlock them.
• cleaner_fix_missing_scripts is an Execute | Modify operation (it replaces missing component references with null in place, no asset deletion), so it does not trigger the NeverInSemi gate. In Auto / Bypass it runs directly; in Approval it still requires the standard grant handshake before execution.
• cleaner_delete_assets additionally uses a two-step confirmToken handshake even when the mode gate allows it — preview first (no token), then confirm with the returned token (5-minute TTL).

DO NOT (common hallucinations):

• cleaner_delete / cleaner_remove do not exist → cleaner skills only find/report; use asset_delete to actually remove
• cleaner_fix does not exist → use cleaner_fix_missing_scripts specifically for missing script references
• cleaner_scan / cleaner_find_unused do not exist → use specific skills: cleaner_find_unused_assets, cleaner_find_duplicates, cleaner_find_missing_references, cleaner_find_empty_folders, cleaner_find_large_assets

Routing:

• To delete found assets → use asset module's asset_delete / asset_delete_batch
• For project validation → use validation module

Skills Overview

Skill	Description
cleaner_find_unused_assets	Find assets not referenced by others
cleaner_find_duplicates	Find duplicate files by content hash
cleaner_find_missing_references	Find missing scripts/asset references
cleaner_delete_assets	Delete assets via two-step confirmToken (preview → confirm)
cleaner_get_asset_usage	Find what references a specific asset
cleaner_find_empty_folders	Find empty folders in the project
cleaner_find_large_assets	Find largest assets by file size
cleaner_delete_empty_folders	Delete all empty folders
cleaner_fix_missing_scripts	Remove missing script components from GameObjects
cleaner_get_dependency_tree	Get dependency tree for an asset

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Skills

cleaner_find_unused_assets

Find potentially unused assets of a specific type.

Parameter	Type	Required	Default	Description
assetType	string	No	"Material"	Asset type filter
searchPath	string	No	"Assets"	Search path
limit	int	No	100	Max results

Returns: {success, assetType, potentiallyUnusedCount, assets: [{path, name, type, sizeBytes}]}

# Find unused materials
result = call_skill("cleaner_find_unused_assets", assetType="Material")

# Find unused textures in a specific folder
result = call_skill("cleaner_find_unused_assets", 
    assetType="Texture2D", searchPath="Assets/Textures")

cleaner_find_duplicates

Find duplicate files by MD5 hash.

Parameter	Type	Required	Default	Description
assetType	string	No	"Texture2D"	Asset type
searchPath	string	No	"Assets"	Search path
limit	int	No	50	Max groups

Returns: {success, duplicateGroupCount, totalWastedBytes, totalWastedMB, groups: [{count, sizeBytes, wastedBytes, files}]}

# Find duplicate textures
result = call_skill("cleaner_find_duplicates", assetType="Texture2D")
print(f"Wasted space: {result['totalWastedMB']:.2f} MB")

cleaner_find_missing_references

Find components with missing scripts or null references.

Parameter	Type	Required	Default	Description
includeInactive	bool	No	true	Include inactive objects

Returns: {success, issueCount, missingScripts, missingReferences, issues: [{type, gameObject, path, ...}]}

# Scan for all missing references
result = call_skill("cleaner_find_missing_references")
print(f"Missing scripts: {result['missingScripts']}")
print(f"Missing references: {result['missingReferences']}")

cleaner_delete_assets

Delete specified assets with two-step confirmation.

⚠️ Safety First: Deletion requires TWO calls - first preview, then confirm.

Step 1 - Preview (no confirmToken):

Parameter	Type	Required	Description
paths	string[]	Yes	Asset paths to delete

Returns: {action: "preview", confirmToken, assetsToDelete, message}

Step 2 - Confirm (with confirmToken):

Parameter	Type	Required	Description
confirmToken	string	Yes	Token from preview step

Returns: {action: "deleted", deletedCount, results}

# Step 1: Preview what will be deleted
preview = call_skill("cleaner_delete_assets", 
    paths=["Assets/Unused/mat1.mat", "Assets/Unused/mat2.mat"])
print(preview['message'])  # Shows: "⚠️ PREVIEW ONLY - 2 assets will be deleted..."
print(preview['assetsToDelete'])  # Full list with sizes

# Step 2: Confirm deletion using token (expires in 5 minutes)
if input("Proceed? (y/n): ") == 'y':
    result = call_skill("cleaner_delete_assets", 
        confirmToken=preview['confirmToken'])
    print(result['message'])  # "Successfully deleted 2 assets"

cleaner_get_asset_usage

Find what objects reference a specific asset.

Parameter	Type	Required	Description
assetPath	string	Yes	Asset path
limit	int	No	Max results (default 50)

Returns: {success, asset, usedByCount, usedBy: [{path, name, type}]}

# Check what uses a texture
result = call_skill("cleaner_get_asset_usage",
    assetPath="Assets/Textures/player.png")

cleaner_find_empty_folders

Find empty folders in the project.

Parameter	Type	Required	Default	Description
searchPath	string	No	"Assets"	Search path

Returns: { success, count, folders }

# Find empty folders
result = call_skill("cleaner_find_empty_folders")
print(f"Found {result['count']} empty folders")

cleaner_find_large_assets

Find largest assets by file size.

Parameter	Type	Required	Default	Description
searchPath	string	No	"Assets"	Search path
limit	int	No	20	Max results
minSizeBytes	long	No	0	Minimum file size in bytes

Returns: { success, count, assets: [{ path, sizeBytes, sizeMB }] }

# Find top 10 largest assets over 1 MB
result = call_skill("cleaner_find_large_assets", limit=10, minSizeBytes=1048576)
for a in result['assets']:
    print(f"{a['sizeMB']:.2f} MB - {a['path']}")

cleaner_delete_empty_folders

Delete all empty folders.

Parameter	Type	Required	Default	Description
searchPath	string	No	"Assets"	Search path

Returns: { success, deleted, total }

# Delete all empty folders
result = call_skill("cleaner_delete_empty_folders")
print(f"Deleted {result['deleted']} of {result['total']} empty folders")

cleaner_fix_missing_scripts

Remove missing script components from GameObjects.

Parameter	Type	Required	Default	Description
includeInactive	bool	No	true	Include inactive objects

Returns: { success, removedComponents }

# Remove all missing script components
result = call_skill("cleaner_fix_missing_scripts")
print(f"Removed {result['removedComponents']} missing script components")

cleaner_get_dependency_tree

Get dependency tree for an asset.

Parameter	Type	Required	Default	Description
assetPath	string	Yes	-	Asset path
recursive	bool	No	true	Recursively resolve dependencies

Returns: { success, assetPath, dependencyCount, dependencies: [{ path, type }] }

# Get full dependency tree for a prefab
result = call_skill("cleaner_get_dependency_tree",
    assetPath="Assets/Prefabs/Player.prefab")
print(f"Dependencies: {result['dependencyCount']}")

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Example Workflow: Clean Project

import unity_skills

# 1. Find all missing references and fix them
missing = unity_skills.call_skill("cleaner_find_missing_references")
for issue in missing['issues']:
    if issue['type'] == 'MissingScript':
        print(f"⚠️ Missing script on: {issue['path']}")

# 2. Find duplicate textures
dupes = unity_skills.call_skill("cleaner_find_duplicates", assetType="Texture2D")
if dupes['totalWastedMB'] > 10:
    print(f"🗑️ {dupes['totalWastedMB']:.1f} MB wasted on duplicates")

# 3. Find unused materials
unused = unity_skills.call_skill("cleaner_find_unused_assets", assetType="Material")
print(f"📦 {unused['potentiallyUnusedCount']} potentially unused materials")

# 4. Preview cleanup
paths_to_delete = [a['path'] for a in unused['assets'][:5]]
preview = unity_skills.call_skill("cleaner_delete_assets", 
    paths=paths_to_delete)
print(f"Would free: {preview['totalMB']:.2f} MB")
# To actually delete, call again with preview['confirmToken'] within 5 minutes.

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Exact Signatures

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