s&box MCP Knowledgebase

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

library_books 595 entries menu_book 352 Documentation code 133 API Reference terminal 100 Code Example groups 10 Community
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menu_bookDocumentation
May 4, 2026

s&box PhysicsBody: Body Types, Adding Shapes, Forces vs Impulses, Move vs Transform

s&box PhysicsBody: Body Types, Shapes, Forces, and Move vs Transform is the s&box physics simulation object. It wraps the native physics engine and can have mul…

menu_bookDocumentation
May 20, 2026

Exporting Standalone: Royalty-Free Game Distribution via Steam

Export your s&box game as a standalone executable for distribution outside the s&box platform. Key Features Steam and beyond — publish to any storefront (must a…

menu_bookDocumentation
May 4, 2026

DisplayInfo: Querying s&box Type and Member Metadata (Title, Icon, Group, Tags)

DisplayInfo: Querying s&box Type and Member Metadata is an s&box struct that aggregates all display-related metadata from attributes on a type or member. The ed…

menu_bookDocumentation
May 5, 2026

Code Generation - s&box Documentation

Official s&box documentation for Code Generation - compile-time code generation. Code Generation covers the source generator system in s&box. The generator crea…

menu_bookDocumentation
May 4, 2026

Inspector Attributes: Group, Title, Icon, Range, InfoBox, Feature, and More

Inspector Attributes: Controlling How Properties Appear in the Editor s&box provides a rich set of attributes to control how component properties appear in the …

menu_bookDocumentation
May 5, 2026

Hotloading — live code reloading, IL fast path, and common pitfalls

Hotloading — Live Code Reloading s&box recompiles and live-reloads your assembly whenever you save a or file. You don't need to restart the editor for most chan…

menu_bookDocumentation
May 4, 2026

Networking State in s&box: IsHost, IsClient, IsActive, and Lobby Management

Networking State in s&box: IsHost, IsClient, IsActive Understanding the networking state is critical for writing correct multiplayer code in s&box. Key Properti…

groupsCommunity
May 5, 2026

s&box networking gotchas — IsProxy, Sync, Authority, NetworkSpawn, and culling

s&box Networking Gotchas Common mistakes when building multiplayer games in s&box. IsProxy vs IsAuthority is true on all clients that don't own the object. Alwa…

terminalCode Example
May 5, 2026

Unit tests in s&box — MSTest setup, engine initialization, and component testing

Unit Tests in s&box s&box supports MSTest-based unit tests. Create a directory in your project folder and restart the editor — a test project is generated autom…

menu_bookDocumentation
May 4, 2026

IHotloadManaged: Preserving and Restoring State Across s&box Hotloads

IHotloadManaged: Preserving State Across s&box Hotloads When a class is hotloaded in s&box, all live instances are replaced with new instances of the updated ty…

menu_bookDocumentation
May 5, 2026

Dedicated Servers - s&box Documentation

Official s&box documentation for dedicated server hosting. Dedicated Servers covers running s&box games on headless servers. Running Local Projects explains tes…

terminalCode Example
May 3, 2026

Playing Sounds

Playing Sounds in s&box s&box provides both 2D and 3D sound playback through code and components. Quick Sound Playback Sound Handle Store the handle to control …

menu_bookDocumentation
May 5, 2026

Reporting Errors - s&box Documentation

Reporting Errors How to report bugs and issues with s&box. Issue Tracker Report bugs on the s&box issue tracker: Search existing issues first Create a new issue…

menu_bookDocumentation
May 3, 2026

Decals in s&box

Decals in s&box Decals are textures projected onto surfaces for bullet holes, graffiti, scorch marks, etc. Decal Component Add to a GameObject: DecalDefinition …

menu_bookDocumentation
May 5, 2026

API Whitelist - s&box Security Documentation

API Whitelist s&box uses a whitelist-based security model to prevent game code from accessing dangerous APIs. Only approved assemblies and types are accessible.…

menu_bookDocumentation
May 4, 2026

s&box Hotload System: How Code Reloading Works, SkipHotload, ConVar Persistence, and NetworkObject.OnHotload

s&box Hotload System: How Code Reloading Works s&box supports live code reloading (hotload) without restarting the game. Understanding how it works helps avoid …

groupsCommunity
May 5, 2026

Common s&box component gotchas — physics, networking, scene, and rendering pitfalls

Common s&box Component Gotchas Practical pitfalls that catch most new s&box developers. Physics Rigidbody + CharacterController on the same GO — don't do it. Th…

terminalCode Example
May 5, 2026

Async tasks in s&box — coroutines, parallel tasks, and frame-by-frame animation

Async Tasks in s&box Components s&box async tasks run on the main thread — they behave like coroutines. Use to yield one frame, to wait, and to run tasks in par…

menu_bookDocumentation
May 4, 2026

s&box Component Lifecycle: Exact Execution Order and Internal Guards

s&box Component Lifecycle: Exact Execution Order and Internal Guards Derived directly from and in the s&box engine source. Execution Order **** — Called once wh…

menu_bookDocumentation
May 3, 2026

Mapping in s&box

Mapping in s&box s&box includes Hammer, the Source 2 level editor, for creating maps. Opening Hammer Main Menu → Tools → Hammer Or click Hammer icon in toolbar …