Native dynamic console: one accepted operation/control channel and repeated explicit data attachments. Attachments, handshake time and total lifetime are bounded. The creating process owns the console; its exit or explicit close releases local channels, sending the pinned 1000 "Detaching from console" close frame on the control channel, without cancelling the backend operation. A failed attachment retains the operation and never repeats the console POST.

attach/1 returns a native WebSocket byte channel. Hosts explicitly send/read binary frames through WebSocket, then detach/2; no terminal, IO device or platform callback is opened automatically. Control messages use native JSON. Asynchronous errors from recognized channels are forwarded as {:dynamic_console, console.pid, {channel.ref, :error, error}}, retaining the exact cause and accepted operation for reconciliation. Unknown channel references are ignored.