Prepared for playback engine

src/dynalab_core/errors.py

@@ -7,6 +7,14 @@ class CoreError(Exception):
     """DynaLab Core error."""
 
 
+class CoreModeIncorrectError(CoreError):
+    """DynaLab Core mode error."""
+
+
+class CoreModeSwitchImpossibleError(CoreError):
+    """DynaLab Core mode error."""
+
+
 class CoreStateMismatchError(CoreError):
     """DynaLab Core state error."""