Add IOTransport for separate reader/writer

mcp/transport.go

@@ -93,6 +93,31 @@ func (*StdioTransport) Connect(context.Context) (Connection, error) {
 	return newIOConn(rwc{os.Stdin, os.Stdout}), nil
 }
 
+
+// NewStdioTransport constructs a transport that communicates over
+// stdin/stdout.
+//
+// Deprecated: use a StdioTransport literal.
+//
+//go:fix inline
+func NewStdioTransport() *StdioTransport {
+	return &StdioTransport{}
+}
+
+
+// An IOTransport is a [Transport] that communicates over separate
+// io.ReadCloser and io.WriteCloser using newline-delimited JSON.
+type IOTransport struct {
+	Reader io.ReadCloser
+	Writer io.WriteCloser
+}
+
+// Connect implements the [Transport] interface.
+func (t *IOTransport) Connect(context.Context) (Connection, error) {
+	return newIOConn(rwc{t.Reader, t.Writer}), nil
+}
+
+
 // An InMemoryTransport is a [Transport] that communicates over an in-memory
 // network connection, using newline-delimited JSON.
 type InMemoryTransport struct {