1 files changed, 24 insertions, 0 deletions
diff --git a/src/SMAPI/Framework/StateTracking/IWatcher.cs b/src/SMAPI/Framework/StateTracking/IWatcher.cs
new file mode 100644
index 00000000..8c7fa51c
--- /dev/null
+++ b/src/SMAPI/Framework/StateTracking/IWatcher.cs
@@ -0,0 +1,24 @@
+using System;
+
+namespace StardewModdingAPI.Framework.StateTracking
+{
+    /// <summary>A watcher which detects changes to something.</summary>
+    internal interface IWatcher : IDisposable
+    {
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>Whether the value changed since the last reset.</summary>
+        bool IsChanged { get; }
+
+
+        /*********
+        ** Methods
+        *********/
+        /// <summary>Update the current value if needed.</summary>
+        void Update();
+
+        /// <summary>Set the current value as the baseline.</summary>
+        void Reset();
+    }
+}