Reactor pattern

An event-demultiplexing loop that blocks on OS readiness notifications (epoll/io_uring) and dispatches ready I/O events to their handlers, forming the core beneath async runtimes.

grounded in: latest AI/tech trends theme: 'Rust and systems-level concurrency ... async concurrency pitfalls are a live debate among systems developers'; system stack is Rust/Yew/WASM (yew, trunk, wasm scripts)