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/bullish0x/gamestudio/setup-enginenpx skills add bullish0x/GameStudio --skill setup-enginegit clone --depth 1 https://github.com/bullish0x/GameStudioWrote 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/bullish0x/gamestudio/setup-engine)<a href="https://agentmods.dev/skills/bullish0x/gamestudio/setup-engine"><img src="https://agentmods.dev/badge/skills/bullish0x/gamestudio/setup-engine.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 5.1 | $0.00044 | $0.09455 |
| Opus 5 | $0.00022 | $0.04727 |
| Sonnet 5 | $0.00009 | $0.01891 |
| Haiku 4.5 | $0.00004 | $0.00945 |
Grade A, and why
setup-engine 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.
This is a copy
95% identical to setup-engine — 135 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 814 lines — stays where its author put it; the contents beside it link to each section on GitHub.
When this skill is invoked:
1. Parse Arguments
Four modes:
- Full spec:
/setup-engine godot 4.6— engine and version provided - Engine only:
/setup-engine unity— engine provided, version will be looked up - No args:
/setup-engine— fully guided mode (engine recommendation + version) - Refresh:
/setup-engine refresh— update reference docs (see Section 10) - Upgrade:
/setup-engine upgrade [old-version] [new-version]— migrate to a new engine version (see Section 11)
Recognized engine keywords: godot, unity, unreal, threejs (Three.js / React Three Fiber — Web 3D), pixijs (PixiJS — Web 2D interactive), phaser (Phaser 4 — Web 2D games). The web engines use language JS/TS; /setup-engine threejs, /setup-engine pixijs, and /setup-engine phaser resolve directly to the templates in Sections 4–5.
2. Guided Mode (No Arguments)
If no engine is specified, run an interactive engine selection process:
Check for existing game concept
- Read
design/gdd/game-concept.mdif it exists — extract genre, scope, platform targets, art style, team size, and any engine recommendation from/brainstorm - If no concept exists, inform the user:
"No game concept found. Consider running
/brainstormfirst to discover what you want to build — it will also recommend an engine. Or tell me about your game and I can help you pick."
If the user wants to pick without a concept, ask in this order:
Question 1 — Prior experience (ask this first, always, via AskUserQuestion):
- Prompt: "Have you worked in any of these engines before?"
- Options:
Godot/Unity/Unreal Engine 5/Multiple — I'll explain/None of them - If they pick a specific engine → recommend that engine. Prior experience outweighs all other factors. Confirm with them and skip the matrix.
- If "None" or "Multiple" → continue to the questions below.
Questions 2-6 — Decision matrix inputs (only if no prior engine experience):
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 · 814 lines · 44 tokens per session scan A 2930c94544d7
setup-engine is a skill published in the GitHub repository bullish0x/GameStudio (10 stars, last pushed 2mo ago), licensed MIT. It adds 44 tokens to every session and 9,455 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to setup-engine, differing in 135 lines, and is treated as a copy.
Other skills, from other repositories
game-development
Game development with Unity, Unreal Engine, and Godot. Use when building games, implementing game mechanics, physics, AI, or working with game engines.
ar-vr-xr
AR/VR/XR development with Unity XR, WebXR, ARKit, ARCore, Meta Quest SDK, and spatial computing. Use when building augmented reality, virtual reality, mixed reality applications, or spatial experiences.
sdf
SDFormat/SDF model and world authoring, validation, and simulator handoff. Use for .sdf files, SDFormat XML, models, worlds, links, joints, poses, frames, inertials, visual/collision geometry, mesh URIs, sensors, lights, physics, plugins, includes, Gazebo, static SDF review, or simulator-specific metadata. Do not use…
unity-agent-workflows
Use for AI-assisted Unity work that needs live repo discovery, project-derived routing, runtime-owner proof, runtime-visible output hard stops, runtime numeric proof for repeated visible-output failures, state-step guards, multi-agent scope ownership, modular C#/asmdef safety, UI/scene/visual asset gates, data-first…
using-bgs-archive
Use when the user wants to inspect, list, extract, unpack, or repack Bethesda BA2/BSA archives; determine archive format/version/compression; or build archive assets for an MO2 overlay. Triggers - "unpack BA2", "extract BSA", "pack archive", "inspect archive", "bgs-archive".
ai-ml-development
AI and machine learning development with PyTorch, TensorFlow, and LLM integration. Use when building ML models, training pipelines, fine-tuning LLMs, or implementing AI features.