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/regression-suitenpx skills add Donchitos/Claude-Code-Game-Studios --skill regression-suitegit 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/regression-suite)<a href="https://agentmods.dev/skills/donchitos/claude-code-game-studios/regression-suite"><img src="https://agentmods.dev/badge/skills/donchitos/claude-code-game-studios/regression-suite.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 | $0.00047 | $0.02185 |
| Opus 5 | $0.00023 | $0.01092 |
| Sonnet 5 | $0.00009 | $0.00437 |
| Haiku 4.5 | $0.00005 | $0.00218 |
Grade A, and why
regression-suite 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 yesterday.
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
4 near-identical copies found in the catalogue:
- regression-suite — 98% identical, 1 lines differ
- regression-suite — 97% identical, 10 lines differ
- regression-suite — 97% identical, 10 lines differ
- regression-suite — 89% identical, 36 lines differ
How it starts
The opening of the file, as written. The whole thing — 257 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Regression Suite
This skill ensures that every bug fix is backed by a test that would have caught the original bug — and that the regression suite stays current as the game evolves. It also detects when new features have been added without corresponding regression coverage.
A regression suite is not a new test category — it is a curated list of
tests already in tests/ that collectively cover the game's critical paths
and known failure points. This skill maintains that list.
Output: tests/regression-suite.md
When to run:
- After fixing a bug (confirm a regression test was written or identify gap)
- Before a release gate (
/gate-check polishrequires regression suite exists) - As part of sprint close to detect coverage drift
1. Parse Arguments
Modes:
/regression-suite update— scan new bug fixes this sprint and check for regression test presence; add new tests to the suite manifest/regression-suite audit— full audit of all GDD critical paths vs. existing test coverage; flag paths with no regression test/regression-suite report— read-only status report (no writes); suitable for sprint reviews- No argument — if a sprint is clearly active (sprint plan exists with in-progress stories), run
update. If ambiguous or no active sprint is detected, useAskUserQuestion:- Prompt: "No subcommand specified. Which mode do you want to run?"
- Options:
[A] update — scan new bug fixes this sprint and add missing regression tests[B] audit — full audit of all GDD critical paths vs. existing test coverage[C] report — read-only status report (no writes)
2. Load Context
Step 2a — Load existing regression suite
Read tests/regression-suite.md if it exists. Extract:
- Total registered regression tests
- Last updated date
- Any tests flagged as
STALEorQUARANTINED
If it does not exist: note "No regression suite found — will create one."
Step 2b — Load test inventory
Glob all test files:
tests/unit/**/*_test.*
tests/integration/**/*_test.*
tests/regression/**/*
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.
- yesterday First seen · 257 lines · 47 tokens per session scan A 8f073b6b576c
regression-suite is a skill published in the GitHub repository Donchitos/Claude-Code-Game-Studios (24,822 stars, last pushed 3mo ago), licensed MIT. It adds 47 tokens to every session and 2,185 once invoked, about $0.0002 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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