js-game-tools

js-game-tools is a command for Claude Code from furkantokkan/agent-foundry. It costs 13 tokens per session (200 once invoked), scanned A, original, MIT.

A command for building JavaScript or TypeScript tools for games, including game backends that use Firebase. It also supports code reviews and Unity API contracts.

In plain words
What is it for?
Use it to implement or review game tooling, Firebase Functions and rules, browser or server game code, and contracts shared with Unity.
Why use it?
It provides consistent choices for SDKs, input checks, error handling, and tests instead of requiring these decisions each time.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Good fit Use it to implement or review game tooling, Firebase Functions and rules, browser or server game code, and contracts shared with Unity.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/furkantokkan/agent-foundry/js-game-tools
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.

Clone the repo
git clone --depth 1 https://github.com/furkantokkan/agent-foundry

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 js-game-tools

README.md
[![agentmods](https://agentmods.dev/badge/commands/furkantokkan/agent-foundry/js-game-tools/github.svg)](https://agentmods.dev/commands/furkantokkan/agent-foundry/js-game-tools)
Your own site
<a href="https://agentmods.dev/commands/furkantokkan/agent-foundry/js-game-tools"><img src="https://agentmods.dev/badge/commands/furkantokkan/agent-foundry/js-game-tools/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 js-game-tools

Your own site · 80×15
<a href="https://agentmods.dev/commands/furkantokkan/agent-foundry/js-game-tools"><img src="https://agentmods.dev/badge/commands/furkantokkan/agent-foundry/js-game-tools.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 200 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 $0.00013 $0.00200
Opus 5.5 $0.00005 $0.00080
Sonnet 5.5 $0.00003 $0.00040
Haiku 4.5 $0.00001 $0.00020

Measured 5d ago against content hash 2896984a3e44, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-29, from the pricing page.

Security

Grade A, and why

js-game-tools 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.

commands/js-game-tools.md · 26 lines

What it actually says

JavaScript Game Tools

The user invoked this command with: $ARGUMENTS

Use javascript-game-tools. Add firebase-game-backend for Firebase Functions, rules, or Unity API contracts. Add game-code-review if this is a review.

Follow these defaults:

  • Use the existing package manager and module style.
  • Prefer TypeScript for production tooling when the repo already supports it.
  • Use Firebase modular Web SDK in browser code and Admin SDK only in trusted server code.
  • Validate API/function inputs at boundaries.
  • Return stable error codes that Unity or web clients can handle.
  • Use the existing test runner first: npm test, node --test, Vitest, Jest, or the package manager equivalent.
  • Add unit tests for observable expected behavior and important failure paths.

Proceed with the JavaScript/TypeScript task.

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 · 26 lines · 13 tokens per session scan A 2896984a3e44

Subscribe to this mod's changes

js-game-tools is a command published in the GitHub repository furkantokkan/agent-foundry (10 stars, last pushed today), licensed MIT. It adds 13 tokens to every session and 200 once invoked, about $0.0001 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 2026-09-25.