murk-arena

Arena-based generational allocation for the Murk simulation engine.

Provides double-buffered ping-pong arenas with three field mutability classes (Static, PerTick, Sparse), zero-copy snapshots, and deterministic memory lifetimes. No GC pauses, no Box<dyn> per cell.

This is an internal crate. Most users should depend on the top-level murk crate instead.