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gdextension

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Use when building native extensions for Godot — godot-cpp (C++) or gdext (Rust), binding classes, building, and GDScript/C# interop

skills/gdextension/SKILL.md

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# GDExtension

Run native C++ (or Rust) in Godot as a shared library **without recompiling the engine**. Use it for performance-critical code, wrapping existing C/C++ libraries, or language bindings.

> **Related skills:** **csharp-godot** for when C# is enough, **gdscript-advanced** for GDScript performance idioms first, **godot-optimization** for profiling before going native, **addon-development** for distributing the result, **export-pipeline** for shipping the binaries.

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## 1. When to reach for GDExtension

Reach for GDScript or C# for almost all game logic. Choose GDExtension only when you genuinely need it:

- **Native speed** in a hot loop that GDScript/C# can't keep up with (profile first — see **godot-optimization**).
- **Wrapping a C/C++ library** you must call directly.