game-server-security

game-server-security is a skill for Claude Code from gmh5225/awesome-game-security. It costs 39 tokens per session (205 once invoked), scanned A, original, MIT.

A guide for reviewing security in multiplayer game servers and their backends, including the systems that handle player identity, game objects, inventories, economies, and purchases.

In plain words
What is it for?
Use it to trace authentication, object ownership, remote calls, inventory and payment operations, server authority, persistence, and token validation.
Why use it?
It helps find cases where a client or untrusted player can request an action that should only be allowed by an authoritative server or service.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to trace authentication, object ownership, remote calls, inventory and payment operations, server authority, persistence, and token validation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gmh5225/awesome-game-security/game-server-security
About the project

awesome-game-security is a curated collection focused on security research for games and game software, including cheating, anti-cheat systems, debugging, and anti-debugging. It is intended for security researchers and developers studying or building game-protection tools. The catalogue entries provide skills for AI coding agents related to the repository’s security workflows.

gmh5225/awesome-game-security · 3,607 stars · on GitHub · gs.awesome.rip

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.

Any agent
npx skills add gmh5225/awesome-game-security --skill game-server-security
Clone the repo
git clone --depth 1 https://github.com/gmh5225/awesome-game-security

Made for: Claude Code.

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 game-server-security

README.md
[![agentmods](https://agentmods.dev/badge/skills/gmh5225/awesome-game-security/game-server-security/github.svg)](https://agentmods.dev/skills/gmh5225/awesome-game-security/game-server-security)
Your own site
<a href="https://agentmods.dev/skills/gmh5225/awesome-game-security/game-server-security"><img src="https://agentmods.dev/badge/skills/gmh5225/awesome-game-security/game-server-security/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for game-server-security

Your own site · 80×15
<a href="https://agentmods.dev/skills/gmh5225/awesome-game-security/game-server-security"><img src="https://agentmods.dev/badge/skills/gmh5225/awesome-game-security/game-server-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 205 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00039 $0.00205
Opus 5.5 $0.00016 $0.00082
Sonnet 5.5 $0.00008 $0.00041
Haiku 4.5 $0.00004 $0.00020

Measured 1mo ago against content hash 929ca6b3c91b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

game-server-security 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 1mo 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.

.claude/skills/game-server-security/SKILL.md · 17 lines

What it actually says

Game server and backend security

Trace one consequential operation across client, transport, server, backend, provider, and durable state. Authentication is an input to authorization, not a substitute for it.

Topic routing

Use anti-cheat-systems for detector enforcement, game-engine-resources for engine replication models, and game-supply-chain-security for released server or plugin artifacts.

Files

What ships with it

3 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. 1mo ago Changed · -170 lines · -51 tokens per session 929ca6b3c91b
  2. 1mo ago First seen · 187 lines · 90 tokens per session scan A 97b0ac3231a2

Subscribe to this mod's changes

game-server-security is a skill published in the GitHub repository gmh5225/awesome-game-security (3,607 stars, last pushed today), licensed MIT. It adds 39 tokens to every session and 205 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-09.

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