First commit

Packages/com.jovian.zonesystem/Runtime/ZonesObjectHolder.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Jovian.ZoneSystem {
+    public class ZonesObjectHolder: MonoBehaviour {
+        internal List<ZoneInstance> Zones { get; } = new();
+        public MapPlane mapPlane;
+
+        public IReadOnlyList<ZoneInstance> AllZones => Zones;
+
+        private void Awake() {
+            Refresh();
+        }
+
+#if UNITY_EDITOR
+        private void OnValidate() {
+            Refresh();
+        }
+#endif
+
+        /// <summary>
+        ///     Re-scans the scene for all ZoneInstances and rebuilds their bounds caches.
+        ///     Call this if you add or remove zones at runtime.
+        /// </summary>
+        private void Refresh() {
+            Zones.Clear();
+            var found = FindObjectsByType<ZoneInstance>(FindObjectsSortMode.None);
+            foreach(var z in found) {
+                z.RebuildBoundsCache();
+                Zones.Add(z);
+            }
+        }
+    }
+
+}