Update continuity_management.py

hybrid/continuity_management.py

@@ -1 +1,43 @@
-print("Hello World")
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Deque, Optional
+from collections import deque
+
+@dataclass
+class Snapshot:
+    """
+    Represents a snapshot of system state with a reason for the snapshot.
+    """
+    state: str
+    reason: str
+
+class ContinuityManager:
+    """Maintains snapshots of system state for continuity purposes."""
+
+    def __init__(self, max_history: int = 10) -> None:
+        self.history: Deque[Snapshot] = deque(maxlen=max_history)
+
+    def record(self, state: str, reason: str) -> None:
+        """
+        Record a new snapshot of the system state with a reason.
+        """
+        self.history.append(Snapshot(state, reason))
+
+    def rewind(self, steps: int = 1) -> Optional[Snapshot]:
+        """
+        Rewind the history by `steps` snapshots and return the current snapshot.
+        If history is empty, return None.
+        """
+        if not self.history:
+            return None
+        for _ in range(min(steps, len(self.history) - 1)):
+            self.history.pop()
+        return self.history[-1]
+
+if __name__ == "__main__":
+    manager = ContinuityManager(max_history=3)
+    manager.record("start", "boot")
+    manager.record("middle", "processing")
+    manager.record("end", "shutdown")
+    print(manager.rewind())