sbox-api

sbox-api is a skill for Claude Code, Codex from LouSputthole/Sbox-Claude. It costs 198 tokens per session (5,363 once invoked), scanned A, original, no licence file.

A coding reference for s&box, Facepunch’s sandbox game engine, and its C# game projects. It also covers the project’s user-interface and component code patterns.

In plain words
What is it for?
Use it when writing or modifying C# code for s&box, Source 2 game projects, .sbproj files, or Razor user-interface panels.
Why use it?
It helps the assistant recognise s&box-specific code and use the right terms when changing a project.

Skill for Claude CodeCodex

Part of the sbox-claude plugin — 5 skills, 1 agent, 2 MCP servers shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/lousputthole/sbox-claude/sbox-api
Any agent
npx skills add LouSputthole/Sbox-Claude --skill sbox-api
Clone the repo
git clone --depth 1 https://github.com/LouSputthole/Sbox-Claude

Made for: Claude Code, Codex.

Or install sbox-claude, the plugin that ships this one along with the rest of its 5 skills, 1 agent, 2 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for sbox-api

README.md
[![agentmods](https://agentmods.dev/badge/skills/lousputthole/sbox-claude/sbox-api.svg)](https://agentmods.dev/skills/lousputthole/sbox-claude/sbox-api)
Your own site
<a href="https://agentmods.dev/skills/lousputthole/sbox-claude/sbox-api"><img src="https://agentmods.dev/badge/skills/lousputthole/sbox-claude/sbox-api.svg" alt="Measured on agentmods" height="20"></a>
Per session 198 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,363 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00198 $0.05363
Opus 5 $0.00099 $0.02681
Sonnet 5 $0.00040 $0.01073
Haiku 4.5 $0.00020 $0.00536

Measured 5d ago against content hash 1f2e397fe9f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

sbox-api scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/sbox-claude/skills/sbox-api/SKILL.md · 274 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 274 lines · 198 tokens per session scan A 1f2e397fe9f8

Subscribe to this mod's changes

sbox-api is a skill published in the GitHub repository LouSputthole/Sbox-Claude (21 stars, last pushed 1mo ago), with no licence file. It adds 198 tokens to every session and 5,363 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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