Menu

Individual skill

sbox

0upvotes

Use when writing or modifying code for s&box, sbox, the Facepunch sandbox engine, or any Source 2 game project in C#. Triggers on mentions of s&box, sbox, sandbox game, Facepunch engine, Source 2 game, `.sbproj`, `.razor` with `PanelComponent`, `@inherits PanelComponent`, `Sandbox.Component`, `GameObject` + `Components.Get<T>`, `Scene.Trace`, `CharacterController` + `.Move()`, `SkinnedModelRenderer`, `NavMeshAgent`, `[Sync]`, `[Rpc.Broadcast]`, `[Property]`, `INetworkListener`, `ISceneEvent`, `PlayerController` in C#. Also triggers on any file with `using Sandbox;` or `using Sandbox.UI;` that isn't Unity/Godot/Unreal. Writes idiomatic s&box C# components, Razor UI, and networking code; prevents Unity-pattern leakage.

SKILL.md

Read pinned source

Source commit 5cb3a0dec9b55a30efdff2fba2dd2eda6634c94b

What was checked

Matches the observed repository HEAD
Yes
Scanner rules are current
No
Repository scan complete
Yes
Skill scan complete
Yes
Observed behavior
Not checked yet
Last checked
Nov 11, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings)
44
Repository last updated
Jun 23, 2026
License
MIT

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files
Read excerpt

# s&box Skill — Router

## READ BEFORE WRITING CODE

**s&box is not Unity.** `MonoBehaviour`, `Start()`, `Update()`, `GetComponent<T>()` call sites, `Instantiate()`, `Destroy(gameObject)`, `Debug.Log`, `[SerializeField]`, `Input.GetKey()`, `Physics.Raycast` — **none of these exist**. If you write any of them you have hallucinated.

s&box is a C# scripting layer on Source 2 by Facepunch. The scene system uses `GameObject` + `Component` with a different lifecycle, a different networking model, and a different API surface. The API schema in `references/api-schema-core.md` is ground truth; if anything in this skill contradicts the schema, the schema wins.

**Before you write a single line of s&box code, open the relevant reference file.** SKILL.md is a router — it points you at the answer, it does not contain the answer. Writing a component? Open `references/core-concepts.md`. Writing UI? Open `references/ui-razor.md`. No exceptions for "simple" tasks — your muscle memory is wrong.

---

## Architecture in 30 Seconds
Back to top