Guide · Agent skill
How to use the Game Developer agent skill: setup and examples
Updated · written with AI from the project's own documentation and checked against our catalogue data
The Game Developer skill is a set of instructions and reference files that gives an AI agent game-development guidance for Unity and Unreal Engine projects. Once it is loaded, the agent structures its help around performance targets, common game patterns such as object pooling and state machines, and specialist topics like ECS architecture, physics, shaders, multiplayer networking and profiling. This guide explains what the skill does, how to install it, how to trigger it, and what to watch for.
Game DeveloperJeffallan/claude-skills · MIT Download the skill Quick start
- 1Download the ZIP. Get the game-developer skill ZIP from this page.
- 2Install the skill. Unzip it into ~/.claude/skills/ for personal use, or into your project's .claude/skills/ folder, or upload it under Settings → Capabilities → Skills in the Claude apps.
- 3Install your engine. Make sure Unity or Unreal Engine is installed for the project, since the skill does not install it.
- 4Ask a specific question. Describe the task, engine and goal in plain language, for example an object pool or a frame-rate problem.
- 5Review the code. Check the output against the skill's rules, such as caching components and avoiding allocations in Update.
- 6Profile and test. Run the Unity Profiler or Unreal Insights yourself and confirm frame time is 16 ms or less for 60 FPS.
What the Game Developer skill makes the agent do
The skill is aimed at implementation work: building game systems, configuring physics systems and colliders, setting up multiplayer networking with lag compensation, developing shaders, and optimizing frame rates to 60+ FPS targets.
Its main output is code examples and architecture advice. The source says the skill mostly produces code and guidance rather than running anything itself.
- Entity Component System (ECS) architecture and component design
- Object pooling, state machines and component caching
- Performance optimization against 60+ FPS targets, using profilers such as Unity Profiler or Unreal Insights
- Server-authoritative multiplayer patterns and lag compensation
Install the Game Developer skill
Download the skill ZIP from the page you are reading. Then choose one of two options.
For a personal setup, unzip the download into ~/.claude/skills/. For a single project, unzip it into that project's .claude/skills/ folder. You can also upload the ZIP in the Claude apps under Settings → Capabilities → Skills.
- Personal: unzip into ~/.claude/skills/
- Project only: unzip into the project's .claude/skills/ folder
- Claude apps: Settings → Capabilities → Skills, then upload the ZIP
Check what the skill needs before you start
The skill does not install Unity or Unreal Engine. You need the engine installed for the project you are working on before the agent's advice is useful.
The skill's files are SKILL.md plus five reference files: references/unity-patterns.md, references/unreal-cpp.md, references/ecs-patterns.md, references/performance-optimization.md and references/multiplayer-networking.md. The reference files are loaded when the task matches their topic.
- Unity or Unreal Engine installed for the project
- No scripts are run by this skill
- The skill does not use the network
Trigger the skill with natural requests
You do not need a special command. Describe the game task in plain language and mention the engine or topic. The skill's trigger keywords include Unity, Unreal Engine, game development, ECS architecture, game physics, multiplayer networking, game optimization, shader programming and game AI.
Specific requests get more useful answers than general ones. Include the engine, the genre, the target platform and the performance goal where you know them.
- "In Unity, write an object pool for my bullets."
- "Set up a state machine for enemy idle, chase and attack in Unity C#."
- "Review this PlayerController for GetComponent calls in Update."
- "Plan a server-authoritative movement check for a multiplayer shooter in Unreal Engine."
- "My Unity scene drops below 60 FPS on mobile. Help me find the bottleneck."
Example: a Unity component caching pattern
The skill's guidance is to cache component references once in Awake rather than calling GetComponent in Update. The example below, from the skill's source, shows the pattern for a player controller that moves with a Rigidbody and uses delta time for frame-independent movement.
public class PlayerController : MonoBehaviour
{
private Rigidbody _rb;
private Animator _animator;
private PlayerInput _input;
private void Awake()
{
_rb = GetComponent<Rigidbody>();
_animator = GetComponent<Animator>();
_input = GetComponent<PlayerInput>();
}
private void FixedUpdate()
{
Vector3 move = _input.MoveDirection * (speed * Time.fixedDeltaTime);
_rb.MovePosition(_rb.position + move);
}
}Review your work against the skill's rules
The skill lists rules it follows, such as using object pooling for frequent instantiation, using CompareTag instead of string comparisons for tags, avoiding allocations in Update and FixedUpdate, and hardcoding no game values in favour of ScriptableObjects or data files. Use these as a checklist when reviewing code, whether the code came from the agent or from your team.
The skill also asks the agent to run profilers. Treat that as a step you carry out in the engine, because the agent cannot confirm frame times or multiplayer behaviour on your hardware.
- Use CompareTag for tags
- Avoid Find methods and GetComponent inside Update loops
- Keep allocations out of Update and FixedUpdate
- Use ScriptableObjects or data files for tunable values
Safety notes: scripts and network
According to the skill's metadata, it runs no scripts and uses no network access. Its role is to shape the agent's written code and advice. Any code it produces still runs only if you put it into your project and build it, so review it before you run it in your engine.
Because the skill cannot verify results, check performance and multiplayer behaviour with the engine's own tools and tests before you ship.
- Runs scripts: no
- Uses network: no
- Review generated code before adding it to your project
What people use it for
- Writing a Unity object pool for bullets, enemies or particles
- Designing an ECS layout with components, systems and a simple world
- Building a state machine for enemy or player behaviour
- Reviewing a Unity script for GetComponent, Find or string tag comparisons in Update
- Planning server-side validation of player movement for multiplayer
Frequently asked questions
How do I install the game-developer agent skill?
Download the ZIP from this page and unzip it into ~/.claude/skills/ for personal use, or into a project's .claude/skills/ folder. You can also upload the ZIP in the Claude apps under Settings → Capabilities → Skills.
What do I need to use the Game Developer skill?
You need Unity or Unreal Engine installed for the project you are working on, because the skill does not install them. The skill runs no scripts and uses no network access.
Is the Game Developer skill free to use?
The skill is published under the MIT licence. Check the licence text in the source repository for the full terms.
Does the skill work with Godot or other engines?
The reference files cover only Unity and Unreal Engine. For other engines, the skill's specific guidance does not apply, so you would need a different resource.
Can the agent test my game's frame rate or multiplayer for me?
No. The skill tells the agent to run profilers, but the agent cannot confirm frame times or multiplayer behaviour on your hardware. You need to run the Unity Profiler or Unreal Insights and your own multiplayer tests.
Why does the agent keep mentioning object pooling and state machines?
The skill's rules call for object pooling for frequent instantiation and proper state machines for game logic. These are common game patterns that it applies when relevant.
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Our verdict
Use this skill if you are an indie or hobby developer working in Unity or Unreal, or a programmer who needs worked examples of ECS, object pooling or netcode. Pick something else if you want a finished game, need verified performance or multiplayer results, or work in an engine other than Unity or Unreal.
Download the skill