@hatch:ecs v0.2.2

Entity-component-system for Wren. World storage + fluent Query.with(C).without(C) filters, component-instance bundles for one-call spawns, typed Resources and Events<T>, deferred Commands for safe mid-loop mutation, hierarchy via setParent / childrenOf, onAdd / onRemove lifecycle hooks, and a Schedule with before / after ordering for system dispatch. Pure Wren — composes with @hatch:game's frame loop, runs anywhere Wren runs.