Guides selection between UGUI and UI Toolkit for projects. Use when choosing UI framework or migrating UI systems.
Helps choose between UGUI (legacy) and UI Toolkit (modern) for Unity projects. Triggers when selecting UI frameworks, planning migrations, or evaluating trade-offs based on Unity version and project requirements.
/plugin marketplace add Dev-GOM/claude-code-marketplace/plugin install unity-dev-toolkit@dev-gom-pluginsThis skill inherits all available tools. When active, it can use any tool Claude has access to.
Helps you choose the appropriate UI system for your Unity project and provides implementation guidance for both UGUI and UI Toolkit.
UGUI (Legacy) - GameObject-based (2014). Mature, works on all Unity versions, large community. Weaker: Complex UI performance, limited styling, no live reload.
UI Toolkit (Modern) - Retained mode, web-inspired UXML/USS (2021.2+). Better performance, live reload, data-binding. Weaker: Requires 2021.2+, smaller community, limited 3D world-space UI.
Use UGUI if:
Use UI Toolkit if:
When in doubt: For new projects on Unity 2021.2+, UI Toolkit is recommended.
| Feature | UGUI | UI Toolkit |
|---|---|---|
| Version | 4.6+ | 2021.2+ |
| Performance | Simple UIs | All UIs |
| Styling | Inspector | CSS-like USS |
| Layout | Manual/Groups | Flexbox-like |
| Editor Tools | Good | Excellent |
| Runtime UI | Excellent | Good |
| 3D World UI | Excellent | Limited |
See migration-guide.md for UGUI → UI Toolkit migration strategy (3-4 months for medium projects).
| Unity Version | UGUI | UI Toolkit (Editor) | UI Toolkit (Runtime) |
|---|---|---|---|
| 2019.4 LTS | ✅ Full | ✅ Basic | ❌ No |
| 2020.3 LTS | ✅ Full | ✅ Good | ⚠️ Experimental |
| 2021.3 LTS | ✅ Full | ✅ Excellent | ✅ Production |
| 2022.3 LTS+ | ✅ Full | ✅ Primary | ✅ Full |
Use this Skill when: Choosing between UGUI and UI Toolkit, understanding UI system trade-offs, or planning UI migration
Use @unity-scripter agent when: Implementing UI components, writing custom UI scripts, or converting UI code
Use @unity-architect agent when: Designing complex UI architecture, planning UI data flow, or structuring large-scale UI systems
Use /unity:new-script command when: Generating Editor scripts with UI Toolkit or UGUI templates
This skill should be used when the user asks to "create a slash command", "add a command", "write a custom command", "define command arguments", "use command frontmatter", "organize commands", "create command with file references", "interactive command", "use AskUserQuestion in command", or needs guidance on slash command structure, YAML frontmatter fields, dynamic arguments, bash execution in commands, user interaction patterns, or command development best practices for Claude Code.
This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "agent tools", "agent colors", "autonomous agent", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.
This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDE_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification). Provides comprehensive guidance for creating and implementing Claude Code plugin hooks with focus on advanced prompt-based hooks API.