s&box MCP Knowledgebase

Documentation, API references, code examples and community knowledge for s&box development.

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codeAPI Reference
May 12, 2026

s&box ThrusterDefinition: Thruster type GameResource

ThrusterDefinition GameResource API Reference ThrusterDefinition is a GameResource that defines a thruster type with a prefab, used by the Thruster tool to spaw…

codeAPI Reference
May 12, 2026

s&box SoundDefinition: Categorized sound GameResource

SoundDefinition GameResource API Reference SoundDefinition is a GameResource that defines a categorized sound for use on spawned entities (thrusters, hoverballs…

terminalCode Example
May 3, 2026

Razor Panel Structure and Syntax

Razor Panel Structure s&box uses Razor syntax for UI panels with files and optional stylesheets. Basic Panel Component File Structure The Element The element is…

menu_bookDocumentation
May 5, 2026

Prefabs - s&box Documentation

Prefabs Prefabs are reusable GameObject templates that allow you to create consistent, repeatable objects across your game. You create a prefab asset from a Gam…

menu_bookDocumentation
May 5, 2026

Binary Serialization - s&box Documentation

Official s&box documentation for Binary Serialization - efficient data storage. Binary Serialization saves data in compact binary format. The system handles ver…

codeAPI Reference
May 12, 2026

s&box ScriptedEmitter: Particle emitter GameResource

ScriptedEmitter GameResource API Reference ScriptedEmitter is a GameResource that defines a particle/VFX emitter with a prefab, used for spawning visual effects…

codeAPI Reference
May 12, 2026

s&box WheelDefinition: Wheel type GameResource

WheelDefinition GameResource API Reference WheelDefinition is a GameResource that defines a wheel type with a prefab, used by the Wheel tool to spawn wheels. Ty…

menu_bookDocumentation
May 4, 2026

GameResource: Custom Asset Types, PostLoad, PostReload, ResourceLibrary.Get, and Resource Networking

GameResource: Custom Asset Types, PostLoad, and Resource Networking is the base class for all JSON-based assets in s&box (prefabs, scene files, custom assets). …

menu_bookDocumentation
May 3, 2026

Shaders in s&box - HLSL and Shading Models

Shaders in s&box - HLSL and Shading Models Write custom shaders in HLSL with Source 2's shading models, render states, and GPU instancing support. Shader Develo…

menu_bookDocumentation
May 5, 2026

Hotloading - s&box Documentation

Hotloading Whenever you save a code file in your project (.cs or .razor files), we recompile and attempt to live-reload the changed assembly. This lets you quic…

codeAPI Reference
May 12, 2026

IDefinitionResource interface

IDefinitionResource Interface Interface for s&box game resources that have title and description metadata. Properties Title () - Display title for the resource …

codeAPI Reference
May 12, 2026

s&box ScriptedEntity: Custom entity GameResource

ScriptedEntity GameResource API Reference ScriptedEntity is a GameResource that defines a spawnable entity with a prefab, used by the spawn menu to create custo…

codeAPI Reference
May 12, 2026

s&box HoverballDefinition: Hoverball type GameResource

HoverballDefinition GameResource API Reference HoverballDefinition is a GameResource that defines a hoverball type with a prefab, used by the Hoverball tool to …

menu_bookDocumentation
May 5, 2026

Styling Panels - s&box UI Documentation

Styling Panels Style your UI panels using SCSS-like stylesheets or direct code styling. Using Stylesheets Create files alongside your files: Or specify a differ…

menu_bookDocumentation
May 3, 2026

Localization (i18n)

Localization (i18n) Support multiple languages using localization tokens. How It Works Use tokens starting with in UI strings. The system replaces them based on…

codeAPI Reference
May 12, 2026

s&box PostProcessResource: Post-processing effect GameResource

PostProcessResource GameResource API Reference PostProcessResource is a GameResource that defines a post-processing effect with a prefab, used by the PostProces…

codeAPI Reference
May 12, 2026

s&box AmmoResource: Shared ammo type GameResource

AmmoResource GameResource API Reference AmmoResource is a GameResource that defines a type of ammo that can be shared across weapons. Weapons that reference the…

codeAPI Reference
May 12, 2026

s&box BalloonDefinition: Balloon type GameResource

BalloonDefinition GameResource API Reference BalloonDefinition is a GameResource that defines a balloon type with a prefab, used by the Balloon tool to spawn ba…

menu_bookDocumentation
May 4, 2026

ConVar and ConCmd: Console Variables and Commands in s&box

ConVar and ConCmd: Console Variables and Commands s&box uses and attributes on static properties and methods to expose them to the console system. ConVar (Conso…

codeAPI Reference
May 3, 2026

Sandbox.UI.Panel

Sandbox.UI.Panel Base class for UI panels. Overview Panel is the base class for all UI in s&box. Create panels using Razor (.razor) files or dynamically in code…