unity-packages-services

Unity Packages and Services Skill

Package Manager Workflow

The Package Manager window (accessed via Window > Package Manager) manages UPM packages, feature sets, and asset packages.

Core Components

• Navigation panel: Select package contexts (Unity Registry, In Project, My Assets)
• Search box: Locate packages by name
• Sort menu: Sort by name or date
• Filter menu: Narrow results by category or status
• Details panel: View package info, version, dependencies, and changelog
• Action buttons: Install, remove, update, and customize packages

Package States

• Released: Fully tested and verified for the current Unity version
• Pre-release: Available but not yet fully verified
• Experimental: Unstable, indicated by a warning badge
• Built-in: Core Unity features that can be toggled on/off to reduce build size
• Deprecated: No longer maintained

Installing and Managing Packages

Via Package Manager UI

1. Open Window > Package Manager
2. Select Unity Registry to browse available packages
3. Select a package and click Install
4. To update: select installed package, choose new version, click Update
5. To remove: select installed package, click Remove

Via manifest.json

Edit Packages/manifest.json directly to add dependencies:

{
    "dependencies": {
        "com.unity.addressables": "2.9.1",
        "com.unity.cinemachine": "3.1.0",
        "com.unity.inputsystem": "1.19.0"
    }
}

Via Git URL

Add packages from Git repositories:

{
    "dependencies": {
        "com.example.package": "https://github.com/user/repo.git#v1.0.0"
    }
}

Or via the Package Manager UI: click the + button > Add package from git URL.

Package Customization

• Copy to project: The Manage dropdown allows copying UPM packages to project folders for modification
• Mutable packages: Local and embedded packages can have their manifests edited directly
• Built-in toggle: Disable unused built-in packages to reduce build size