game-developer
Use when building game systems, implementing Unity/Unreal Engine features, or optimizing game performance. Invoke to implement ECS architecture, configure physics systems and colliders, set up multiplayer networking with lag compensation, optimize frame rates to 60+ FPS targets, develop shaders, or apply game design patterns such as object pooling and state machines. Trigger keywords: Unity, Unreal Engine, game development, ECS architecture, game physics, multiplayer networking, game optimization, shader programming, game AI.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/jeffallan/claude-skills --skill game-developer- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads game-developer automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
Security audits
Independent scans of the skill's instructions and bundled files.
SKILL.md
The instructions your agent reads when the skill is triggered.
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)
Output Templates
When implementing game features, provide:
- Core system implementation (ECS component, MonoBehaviour, or Actor)
- Associated data structures (ScriptableObjects, structs, configs)
- Performance considerations and optimizations
- Brief explanation of architecture decisions
Key Code Patterns
Object Pooling (Unity C#)
public class ObjectPool<T> where T : Component
{
private readonly Queue<T> _pool = new();
private readonly T _prefab;
private readonly Transform _parent;
public ObjectPool(T prefab, int initialSize, Transform parent = null)
{
_prefab = prefab;
_parent = parent;
for (int i = 0; i < initialSize; i++)
Release(Create());
}
public T Get()
{
T obj = _pool.Count > 0 ? _pool.Dequeue() : Create();
obj.gameObject.SetActive(true);
return obj;
}
public void Release(T obj)
{
obj.gameObject.SetActive(false);
_pool.Enqueue(obj);
}
private T Create() => Object.Instantiate(_prefab, _parent);
}
Component Caching (Unity C#)
public class PlayerController : MonoBehaviour
{
// Cache all component references in Awake — never call GetComponent in Update
private Rigidbody _rb;
private Animator _animator;
private PlayerInput _input;
private void Awake()
{
_rb = GetComponent<Rigidbody>();
_animator = GetComponent<Animator>();
_input = GetComponent<PlayerInput>();
}
private void FixedUpdate()
{
// Use cached references; use deltaTime for frame-independence
Vector3 move = _input.MoveDirection * (speed * Time.fixedDeltaTime);
_rb.MovePosition(_rb.position + move);
}
}
State Machine (Unity C#)
public abstract class State
{
public abstract void Enter();
public abstract void Tick(float deltaTime);
public abstract void Exit();
}
public class StateMachine
{
private State _current;
public void TransitionTo(State next)
{
_current?.Exit();
_current = next;
_current.Enter();
}
public void Tick(float deltaTime) => _current?.Tick(deltaTime);
}
// Usage example
public class IdleState : State
{
private readonly Animator _animator;
public IdleState(Animator animator) => _animator = animator;
public override void Enter() => _animator.SetTrigger("Idle");
public override void Tick(float deltaTime) { /* poll transitions */ }
public override void Exit() { }
}
Maintained by @jeffallan, Principal Consultant at Synergetic Solutions
FAQ
What does the game-developer skill do?
Use when building game systems, implementing Unity/Unreal Engine features, or optimizing game performance. Invoke to implement ECS architecture, configure physics systems and colliders, set up multiplayer networking with lag compensation, optimize frame rates to 60+ FPS targets, develop shaders, or apply game design patterns such as object pooling and state machines. Trigger keywords: Unity, Unreal Engine, game development, ECS architecture, game physics, multiplayer networking, game optimization, shader programming, game AI.
How do I install game-developer?
Run npx skills add https://github.com/jeffallan/claude-skills --skill game-developer in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/game-developer/ (personal) or .claude/skills/game-developer/ (project).
Which AI agents can use game-developer?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is game-developer safe to install?
Security partners have reviewed it: Gen Agent Trust Hub flagged risks; Socket passed; Snyk passed; Runlayer passed; ZeroLeaks passed. As with any skill, read the SKILL.md and bundled scripts before installing.
Who maintains game-developer?
It is published by jeffallan in jeffallan/claude-skills. It has 6,464 recorded installs.
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