Struct SerialRead

go/engine/node/serialread.go:30–35

SerialRead blocks on a serial port until one line arrives, then emits it through the output binding and advances. The receive buffer is flushed first so pre-existing chatter doesn't satisfy the read; when prompt is non-empty it is written next, then the blocking read runs. The driver's Read steals f

// The driver's Read steals from the broadcast path while it is in flight,
// so any concurrent OnSerialReceive trigger pauses for the duration.
type SerialRead struct {
	engine.LinearNode
	binding workflowapi.OutputBinding
	prompt  string
	uart    *channel.UART
}

// NewSerialRead builds a SerialRead bound to the given UART channel.
// prompt may be empty.