Introduction

Ghost.Entities is an archetype-based ECS runtime designed for high throughput and predictable memory access.

At a high level:

• World owns all ECS state for an isolated simulation context.
• EntityManager performs structural/entity/component operations.
• ComponentManager owns archetypes and cached queries.
• EntityQuery provides data access and iteration over matching archetypes/chunks.
• SystemManager and SystemGroup drive update order and lifecycle.

The runtime favors:

• contiguous data layouts,
• low-level spans/pointers in hot paths,
• explicit structural changes,
• deferred writes through EntityCommandBuffer for safe mutation points.

Use this section for conceptual docs, and doc/api/ for generated API reference.