Agent skill · software engineering · aiskillstore
bevy-ecs-expert
Master Bevy's Entity Component System (ECS) in Rust, covering Systems, Queries, Resources, and parallel scheduling.
Why this skill is useful
Provides specific patterns and practices for optimizing game logic in Bevy's ECS architecture that the AI wouldn't reliably generate on its own.
What it needs
Requires rust installed locally. About 2k tokens when loaded. Last updated 2026-08-07. 405 stars on the source repository.
What this skill does
Bevy ECS Expert Overview A guide to building high-performance game logic using Bevy's data-oriented ECS architecture. Learn how to structure systems, optimize queries, manage resources, and leverage parallel execution. When to Use This Skill Use when developing games with the Bevy engine in Rust. Use when designing game systems that need to run in parallel. Use when optimizing game performance by minimizing cache misses. Use when refactoring object-oriented logic into data-oriented ECS patterns. Step-by-Step Guide 1. Defining Components Use simple structs for data. Derive Component and Reflect. 2. Writing Systems Systems are regular Rust functions that query components. 3. Managing Resources Use Resource for global data (score, game state). 4. Scheduling Systems Add systems to the App builder, defining execution order if needed. Examples Example 1: Spawning Entities with Require Component Example 2: Query Filters Use With and Without to filter entities efficiently. Best Practices ✅ Do: Use Query filters (With, Without, Changed) to reduce iteration count. ✅ Do: Prefer Res over ResMut when read-only access is sufficient to allow parallel execution. ✅ Do: Use Bundle to spawn complex entities atomically. ❌ Don't: Store heavy logic inside Components; keep them as pure data. ❌ Don't: Use RefCell or interior mutability inside components; let the ECS handle borrowing. Troubleshooting Problem: System panic with "Conflict" error. Solution: You are likely trying to access the same component mutably in two systems running in parallel. Use .chain() to order them or split the logic. Limitations Use this skill only when the task clearly matches the scope described above. Do not treat the output as a substitute for environment-specific validation, testing, or expert review. Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills aiskillstore/bevy-ecs-expert