The World
The wasm-bindgen World struct that owns the entire simulation.
Neurons & axons
How mesh vertices become neurons and how axons are wired and sampled.
Signal pool
The struct-of-arrays signal pool and the per-frame step.
Regions & stimulus
The four cortical regions and how stimulus injection drives them.
Telemetry
The telemetry snapshot contract shared between Rust and TypeScript, plus the observability telemetry bridge.