Initial commit

Abstractions/IPlanStateStore.cs

@@ -0,0 +1,11 @@
+namespace RudderSdk.Core.Abstractions;
+
+/// <summary>
+/// Persists serialized scenario-run state between app launches.
+/// Null by default (no persistence).
+/// </summary>
+public interface IPlanStateStore
+{
+    /// <summary>Serialized state blob, or null when empty.</summary>
+    string? State { get; set; }
+}