koota

Define trait-based components and manage entity worlds in React.

31|Updated Jan 19, 2026
One-click install
npx skills add https://github.com/verekia/r3f-gamedev --skill koota-verekia
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: koota
Source: https://github.com/verekia/r3f-gamedev/tree/main/skills/koota
Command: npx skills add https://github.com/verekia/r3f-gamedev --skill koota-verekia

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Solves the complexity of building a data-oriented ECS in React by providing trait-based components, a world lifecycle, and reactive hooks.

Core Features & Use Cases

  • trait() defines component schemas with default values
  • world.spawn() creates entities with traits
  • world.query() finds entities matching traits
  • useQuery() for reactive entity lists in React
  • useTraitEffect() for responding to trait changes without re-rendering
  • Systems are React components that use useFrame to update entities

Quick Start

Define a trait, create a world, spawn entities with traits, and render reactive entity lists in React with useQuery.

Frequently Asked Questions about koota

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build a data-oriented ECS in React for real-time simulations?

Use trait() to define component schemas with default values, world.spawn() to create entities with traits, and useQuery() to render reactive entity lists. Systems are React components that use useFrame to update entities.

Can I query entities reactively in React without triggering unnecessary re-renders?

Use useQuery() to fetch reactive entity lists matching specific traits and useTraitEffect() to respond to trait changes without triggering re-renders. This allows efficient reactive updates in React.

What is the best way to manage entity spawning and querying in a React application?

Manage entity spawning and querying through a centralized world lifecycle. Use world.spawn() to create entities with traits and world.query() to find entities matching specific trait definitions.

When do I need a trait-based ECS architecture for my React application?

You need a trait-based ECS architecture when your React application requires real-time entity systems, simulations, or interactive scenes with spawning, querying, and updating entities. It solves the complexity of building data-oriented systems.

Does this ECS approach work with standard React hooks for updating interactive scenes?

Yes, the ECS approach works with React hooks by exposing useQuery for reactive entity lists and useTraitEffect for responding to trait changes. Systems are React components that use useFrame to update entities.