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Source/WulaFallenEmpire/HarmonyPatches/WULA_MechUnit/Patche_SkillSystem.cs

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+// File: HarmonyPatches/SkillSystemPatches.cs
+using HarmonyLib;
+using RimWorld;
+using Verse;
+
+namespace WulaFallenEmpire
+{
+    /// <summary>
+    /// 针对SkillRecord.Interval()的补丁，防止在机甲上出现空引用
+    /// </summary>
+    [HarmonyPatch(typeof(SkillRecord))]
+    [HarmonyPatch("Interval")]
+    public static class Patch_SkillRecord_Interval
+    {
+        [HarmonyPrefix]
+        public static bool Prefix(SkillRecord __instance)
+        {
+            // 额外检查：如果pawn.story为null，也跳过
+            if (__instance?.Pawn?.story == null)
+            {
+                return false; // 跳过原方法
+            }
+
+            return true; // 执行原方法
+        }
+    }
+
+}