Added the system from trail

Runtime/EncounterContext.cs

@@ -0,0 +1,15 @@
+namespace Jovian.EncounterSystem {
+    /// <summary>
+    /// Per-resolution state passed into every event handler invoked by <see cref="EncounterResolver.Resolve"/>.
+    /// Holds "who/what is currently being resolved" — not long-lived services. Extend with additional
+    /// fields (party, selected option, acting character, …) as handlers need them.
+    /// </summary>
+    public class EncounterContext {
+        /// <summary>The encounter whose dialog option fired this resolution.</summary>
+        public IEncounter CurrentEncounter { get; }
+
+        public EncounterContext(IEncounter currentEncounter) {
+            CurrentEncounter = currentEncounter;
+        }
+    }
+}