添加 claude code game studios 到项目

docs/engine-reference/unity/VERSION.md

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+# Unity Engine — Version Reference
+
+| Field | Value |
+|-------|-------|
+| **Engine Version** | Unity 6.3 LTS |
+| **Release Date** | December 2025 |
+| **Project Pinned** | 2026-02-13 |
+| **Last Docs Verified** | 2026-02-13 |
+| **LLM Knowledge Cutoff** | May 2025 |
+
+## Knowledge Gap Warning
+
+The LLM's training data likely covers Unity up to ~2022 LTS (2022.3). The entire
+Unity 6 release series (formerly Unity 2023 Tech Stream) introduced significant
+changes that the model does NOT know about. Always cross-reference this directory
+before suggesting Unity API calls.
+
+## Post-Cutoff Version Timeline
+
+| Version | Release | Risk Level | Key Theme |
+|---------|---------|------------|-----------|
+| 6.0 | Oct 2024 | HIGH | Unity 6 rebrand, new rendering features, Entities 1.3, DOTS improvements |
+| 6.1 | Nov 2024 | MEDIUM | Bug fixes, stability improvements |
+| 6.2 | Dec 2024 | MEDIUM | Performance optimizations, new input system improvements |
+| 6.3 LTS | Dec 2025 | HIGH | First LTS since 6.0, production-ready DOTS, enhanced graphics features |
+
+## Major Changes from 2022 LTS to Unity 6.3 LTS
+
+### Breaking Changes
+- **Entities/DOTS**: Major API overhaul in Entities 1.0+, complete redesign of ECS patterns
+- **Input System**: Legacy Input Manager deprecated, new Input System is default
+- **Rendering**: URP/HDRP significant upgrades, SRP Batcher improvements
+- **Addressables**: Asset management workflow changes
+- **Scripting**: C# 9 support, new API patterns
+
+### New Features (Post-Cutoff)
+- **DOTS**: Production-ready Entity Component System (Entities 1.3+)
+- **Graphics**: Enhanced URP/HDRP pipelines, GPU Resident Drawer
+- **Multiplayer**: Netcode for GameObjects improvements
+- **UI Toolkit**: Production-ready for runtime UI (replaces UGUI for new projects)
+- **Async Asset Loading**: Improved Addressables performance
+- **Web**: WebGPU support
+
+### Deprecated Systems
+- **Legacy Input Manager**: Use new Input System package
+- **Legacy Particle System**: Use Visual Effect Graph
+- **UGUI**: Still supported, but UI Toolkit recommended for new projects
+- **Old ECS (GameObjectEntity)**: Replaced by modern DOTS/Entities
+
+## Verified Sources
+
+- Official docs: https://docs.unity3d.com/6000.0/Documentation/Manual/index.html
+- Unity 6 release: https://unity.com/releases/unity-6
+- Unity 6.3 LTS announcement: https://unity.com/blog/unity-6-3-lts-is-now-available
+- Migration guide: https://docs.unity3d.com/6000.0/Documentation/Manual/upgrade-guides.html
+- Unity 6 support: https://unity.com/releases/unity-6/support
+- C# API reference: https://docs.unity3d.com/6000.0/Documentation/ScriptReference/index.html