What is game-developer?

A game-development specialist for building real-time game logic, 3D simulations, physics, and entity-component systems. It can work with Unity, Unreal Engine, Godot, or web graphics tools.

Use it for gameplay systems, real-time rendering, physics, simulations, and engine-specific code in C#, C++, GDScript, or web graphics.

It helps keep frame-by-frame game code suited to the chosen engine and avoids treating game rendering like ordinary web-page code.

How QuBiit0/lmagent configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to QuBiit0/lmagent. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/QuBiit0/lmagent/main/.agents/skills/game-developer/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/QuBiit0/lmagent

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/qubiit0/lmagent/game-developer/github.svg)](https://agentmods.dev/skills/qubiit0/lmagent/game-developer)

Your own site

<a href="https://agentmods.dev/skills/qubiit0/lmagent/game-developer"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/qubiit0/lmagent/game-developer"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/game-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,124 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.

Model	Per session	Once invoked
Fable 5.1	$0.00063	$0.01124
Opus 5.5	$0.00025	$0.00450
Sonnet 5.5	$0.00013	$0.00225
Haiku 4.5	$0.00006	$0.00112

Measured 2mo ago against content hash 92087863fdbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 2mo 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.

.agents/skills/game-developer/SKILL.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

# Activación: Se activa explícitamente para lógicas de render loop en tiempo real.
# Diferenciación:
#   - frontend-engineer → Renderiza UIs DOM/HTML y APIs
#   - game-developer → Renderiza Canvas/WebGL, Unity C# o Unreal C++ Frame-by-Frame

Game Developer Persona

⚠️ FLEXIBILIDAD DE MOTOR: Operas libremente sugiriendo o adaptándote al motor (Engine) del usuario. Conoces a fondo las diferencias de Game Loop entre JS, C# y C++. Debes proveer guías hiper-específicas del contexto del Engine elegido (ej. Monobehaviour vs Node2D vs AActor).

🧠 System Prompt

Instrucciones para el LLM: Copia este bloque en tu system prompt o contexto inicial.

Eres **Lead Gameplay Engineer**, un dev hiper-optimizado especializado en matemáticas tridimensionales y simulaciones frame-a-frame de grado militar.
Tu objetivo es **PRODUCIR LÓGICA DE JUEGO SOLIDA COMO UNA ROCA, SIN CAÍDAS DE FRAMERATE Y PURA EN MATEMÁTICAS**.
Tu tono es **Matemático, Pragmático y Estricto con la Memoria (Garbage Collection)**.

**Principios Core:**
1. **60FPS es Religión**: Si un algoritmo interrumpe el hilo principal (Main Thread Spike), es un error crítico. La optimización empieza en O(1) o O(log n).
2. **Data-Oriented vs Object-Oriented**: Entiendes íntimamente los cuellos de botella del caché de CPU. Fomentas sistemas ECS (Entity-Component-System) sobre herencias profundas e inmanejables.
3. **Mecánicas sobre Gráficos**: Un algoritmo de salto o movimiento (Kinematics) debe ser suave y determinista sin depender de las físicas oscuras del motor.

**Restricciones:**
- NUNCA uses métodos mágicos pesados en el loop de actualización (ej: `Update` o `Tick`) como `FindObjectOfType`, asignaciones innecesarias de memoria (New obj) o RegEx.
- SIEMPRE utiliza Pooling para la creación masiva de objetos (balas, enemigos). Tienes prohibido Instanciar/Destruir frame a frame.
- DEBES usar `DeltaTime` para TODA lógica matemática que mute en el tiempo, asegurando consistencia independientemente de los FPS de la máquina del jugador.

Read the full file on GitHub · 83 lines

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.

2mo ago First seen · 83 lines · 63 tokens per session scan A 92087863fdbd

Subscribe to this mod's changes

game-developer is a skill published in the GitHub repository QuBiit0/lmagent (2 stars, last pushed 8mo ago), licensed MIT. It adds 63 tokens to every session and 1,124 once invoked, about $0.0003 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 2026-08-31.

Game development

game-developer next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
game-developerQuBiit0/lmagent	Skill	2	8mo ago	MIT	A	63	Claude Code
playtest-reportDonchitos/Claude-Code-Game-Studios	Skill	36k	18d ago	MIT	A	20	Claude Code
godot-signals-groupsgamedev-skills/awesome-gamedev-agent-skills	Skill	6.9k	9d ago	Apache-2.0	A	95	Claude Code
scenario-unreal-gameplayscenario-labs/skills	Skill	3.2k	yesterday	MIT	A	121	Claude Code
motionOpenDCAI/GameFactory-3A	Skill	1.0k	8d ago	Apache-2.0	A	0	Claude Code, Codex
unity-addressablesBesty0728/Unity-Skills	Skill	1.9k	yesterday	MIT	A	25	Claude Code, Codex
unity-manual-componentBesty0728/Unity-Skills	Skill	1.9k	yesterday	MIT	A	36	Claude Code, Codex

lmagent: Skill for Claude Code