Claude Code Game Studios is a setup that organizes Claude Code into a coordinated game-development team of specialized AI agents. It supports game projects across design, programming, art, audio, narrative, quality assurance, and production, with skills and workflows for coordinating that work.
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.
npx agentmods add skills/donchitos/claude-code-game-studios/test-helpersnpx skills add Donchitos/Claude-Code-Game-Studios --skill test-helpersgit clone --depth 1 https://github.com/Donchitos/Claude-Code-Game-StudiosWrote 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.
[](https://agentmods.dev/skills/donchitos/claude-code-game-studios/test-helpers)<a href="https://agentmods.dev/skills/donchitos/claude-code-game-studios/test-helpers"><img src="https://agentmods.dev/badge/skills/donchitos/claude-code-game-studios/test-helpers.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00050 | $0.02927 |
| Opus 5 | $0.00025 | $0.01463 |
| Sonnet 5 | $0.00010 | $0.00585 |
| Haiku 4.5 | $0.00005 | $0.00293 |
Grade A, and why
test-helpers 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 2d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- test-helpers — 97% identical, 3 lines differ
- test-helpers — 97% identical, 1 lines differ
How it starts
The opening of the file, as written. The whole thing — 396 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Test Helpers
Writing test cases is faster and more consistent when common setup, teardown,
and assertion patterns are abstracted into helpers. This skill generates a
tests/helpers/ library tailored to the project's actual engine, language,
and systems — so every developer writes less boilerplate and more assertions.
Output: tests/helpers/ directory with engine-specific helper files
When to run:
- After
/test-setupscaffolds the framework (first time) - When multiple test files repeat the same setup boilerplate
- When starting to write tests for a new system
1. Parse Arguments
Modes:
/test-helpers [system-name]— generate helpers for a specific system (e.g.,/test-helpers combat)/test-helpers all— generate helpers for all systems with test files/test-helpers scaffold— generate only the base helper library (no system-specific helpers); use this on first run- No argument — run
scaffoldif no helpers exist, elseall
2. Detect Engine and Language
Read .claude/docs/technical-preferences.md and extract:
Engine:valueLanguage:valueFramework:from the Testing section
If engine is not configured: "Engine not configured. Run /setup-engine first."
3. Load Existing Test Patterns
Scan the test directory for patterns already in use:
Glob pattern="tests/**/*_test.*" (all test files)
For a representative sample (up to 5 files), read the test files and extract:
- Setup patterns (how
before_each/setUp/ fixtures are written) - Common assertion patterns (what is being asserted most often)
- Object creation patterns (how game objects or scenes are instantiated in tests)
- Mock/stub patterns (how dependencies are replaced)
This ensures generated helpers match the project's existing style, not a generic template.
Also read:
design/gdd/systems-index.md— to know which systems exist- In-scope GDD(s) — to understand what data types and values need testing
docs/architecture/tr-registry.yaml— to map requirements to tested systems
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.
- 2d ago First seen · 396 lines · 50 tokens per session scan A 98494481c7fe
test-helpers is a skill published in the GitHub repository Donchitos/Claude-Code-Game-Studios (24,822 stars, last pushed 3mo ago), licensed MIT. It adds 50 tokens to every session and 2,927 once invoked, about $0.0003 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 2026-09-03.
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