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diff --git a/circuitpython/shared-bindings/supervisor/Runtime.h b/circuitpython/shared-bindings/supervisor/Runtime.h
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+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Michael Schroeder
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_RUNTIME_STATUS_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_RUNTIME_STATUS_H
+
+#include <stdbool.h>
+#include "py/obj.h"
+
+#include "shared-bindings/supervisor/RunReason.h"
+
+extern const mp_obj_type_t supervisor_runtime_type;
+
+supervisor_run_reason_t supervisor_get_run_reason(void);
+void supervisor_set_run_reason(supervisor_run_reason_t run_reason);
+
+bool common_hal_supervisor_runtime_get_serial_connected(void);
+
+bool common_hal_supervisor_runtime_get_serial_bytes_available(void);
+
+// TODO: placeholders for future functions
+// bool common_hal_get_supervisor_runtime_repl_active(void);
+// bool common_hal_get_supervisor_runtime_usb_enumerated(void);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_SUPERVISOR_RUNTIME_H