Method fail

go/copilot_request_handler.go:360–368

(message string, code string)

}

func (w *wsResponseWriter) fail(message string, code string) error {
	w.mu.Lock()
	defer w.mu.Unlock()
	if w.completed {
		return nil
	}
	w.completed = true
	return w.sink.sinkError(message, code)
}

// CopilotWebSocketForwarder is the default [CopilotWebSocketHandler]:
// it dials the real upstream and runs a receive loop forwarding upstream→runtime