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 skills add GuitarAlchemist/ga --skill game-developergit clone --depth 1 https://github.com/GuitarAlchemist/gaWrote 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/guitaralchemist/ga/game-developer)<a href="https://agentmods.dev/skills/guitaralchemist/ga/game-developer"><img src="https://agentmods.dev/badge/skills/guitaralchemist/ga/game-developer/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.
<a href="https://agentmods.dev/skills/guitaralchemist/ga/game-developer"><img src="https://agentmods.dev/badge/skills/guitaralchemist/ga/game-developer.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00099 | $0.01213 |
| Opus 5.5 | $0.00040 | $0.00485 |
| Sonnet 5.5 | $0.00020 | $0.00243 |
| Haiku 4.5 | $0.00010 | $0.00121 |
Grade A, and why
game-developer 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.
This is a copy
94% identical to game-developer — 5 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 — 162 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Game Developer
Core Workflow
- Analyze requirements — Identify genre, platforms, performance targets, multiplayer needs
- Design architecture — Plan ECS/component systems, optimize for target platforms
- Implement — Build core mechanics, graphics, physics, AI, networking
- Optimize — Profile and optimize for 60+ FPS, minimize memory/battery usage
- ✅ Validation checkpoint: Run Unity Profiler or Unreal Insights; verify frame time ≤16 ms (60 FPS) before proceeding. Identify and resolve CPU/GPU bottlenecks iteratively.
- Test — Cross-platform testing, performance validation, multiplayer stress tests
- ✅ Validation checkpoint: Confirm stable frame rate under stress load; run multiplayer latency/desync tests before shipping.
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Unity Development | references/unity-patterns.md |
Unity C#, MonoBehaviour, Scriptable Objects |
| Unreal Development | references/unreal-cpp.md |
Unreal C++, Blueprints, Actor components |
| ECS & Patterns | references/ecs-patterns.md |
Entity Component System, game patterns |
| Performance | references/performance-optimization.md |
FPS optimization, profiling, memory |
| Networking | references/multiplayer-networking.md |
Multiplayer, client-server, lag compensation |
Constraints
MUST DO
- Target 60+ FPS on all platforms
- Use object pooling for frequent instantiation
- Implement LOD systems for optimization
- Profile performance regularly (CPU, GPU, memory)
- Use async loading for resources
- Implement proper state machines for game logic
- Cache component references (avoid GetComponent in Update)
- Use delta time for frame-independent movement
MUST NOT DO
- Instantiate/Destroy in tight loops or Update()
- Skip profiling and performance testing
- Use string comparisons for tags (use CompareTag)
- Allocate memory in Update/FixedUpdate loops
- Ignore platform-specific constraints (mobile, console)
- Use Find methods in Update loops
- Hardcode game values (use ScriptableObjects/data files)
What ships with it
5 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.
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.
- 1mo ago First seen · 162 lines · 99 tokens per session scan A a7221459f6d2
game-developer is a skill published in the GitHub repository GuitarAlchemist/ga (2 stars, last pushed yesterday), licensed MIT. It adds 99 tokens to every session and 1,213 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 94% identical to game-developer, differing in 5 lines, and is treated as a copy.
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