Added the system from trail

Runtime/EncounterResolver.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+
+namespace Jovian.EncounterSystem {
+    /// <summary>
+    /// Dispatches <see cref="IEncounterEvent"/> instances (authored on dialog options) to per-type
+    /// handlers registered at composition time. Unknown event types are silently skipped.
+    /// </summary>
+    /// <remarks>
+    /// The resolver stores handlers keyed by concrete event <see cref="Type"/>. Registration wraps a
+    /// typed delegate in a closure that casts back to the concrete type — the cast is safe because
+    /// we only ever invoke the wrapped delegate via the dictionary lookup under the same key.
+    /// </remarks>
+    public class EncounterResolver {
+        private readonly Dictionary<Type, Action<IEncounterEvent, EncounterContext>> handlers = new();
+
+        /// <summary>Register a handler for a concrete event type. Replaces any prior registration.</summary>
+        /// <typeparam name="T">The event type to handle.</typeparam>
+        /// <param name="handler">The delegate invoked with the cast event and the resolution context.</param>
+        public void Register<T>(Action<T, EncounterContext> handler) where T : IEncounterEvent {
+            handlers[typeof(T)] = (evt, ctx) => handler((T)evt, ctx);
+        }
+
+        /// <summary>Remove the handler registered for event type <typeparamref name="T"/>, if any.</summary>
+        public void Unregister<T>() where T : IEncounterEvent {
+            handlers.Remove(typeof(T));
+        }
+
+        /// <summary>Dispatch each event in <paramref name="events"/> to its registered handler, in order.
+        /// Null events and events with no registered handler are skipped.</summary>
+        /// <param name="events">The ordered event list (typically from an <see cref="EncounterDialogOption"/>).</param>
+        /// <param name="context">Per-resolution context passed to every handler.</param>
+        public void Resolve(IEnumerable<IEncounterEvent> events, EncounterContext context) {
+            if(events == null) {
+                return;
+            }
+
+            foreach(var evt in events) {
+                if(evt == null) {
+                    continue;
+                }
+
+                if(handlers.TryGetValue(evt.GetType(), out var handler)) {
+                    handler(evt, context);
+                }
+            }
+        }
+    }
+}