diff --git a/Assets/Tests/EditMode/AI/PerceptionSkeletonTests.cs b/Assets/Tests/EditMode/AI/PerceptionSkeletonTests.cs
index b3f49a15..882dd2ab 100644
--- a/Assets/Tests/EditMode/AI/PerceptionSkeletonTests.cs
+++ b/Assets/Tests/EditMode/AI/PerceptionSkeletonTests.cs
@@ -216,5 +216,71 @@ namespace BaseGames.Tests.EditMode.AI
             Assert.Throws<System.ArgumentNullException>(() => PerceptionSkeleton.Add(
                 b, null, new RushEngagement("rush")));
         }
+
+        // ── 模块组合：抽象的存在理由，必须端到端验证 ─────────────────────
+
+        [Test]
+        public void Skeleton_WithApproachAttack_EscalatesAndDisengages()
+        {
+            var ctx = new Ctx();
+            var rt = Build(ctx, new SinglePost(LocomotionMode.Patrol), new ApproachAttackEngagement());
+            Assert.AreEqual(SinglePost.Post, rt.CurrentStateName);
+
+            ctx.S.Chase = true; rt.Tick(0.1f);
+            Assert.AreEqual(ApproachAttackEngagement.Approach, rt.CurrentStateName);
+
+            ctx.C.Eligible = true; rt.Tick(0.1f);
+            Assert.AreEqual(ApproachAttackEngagement.Attack, rt.CurrentStateName);
+
+            ctx.C.Running = null; rt.Tick(0.1f);            // 招式打完
+            Assert.AreEqual(ApproachAttackEngagement.Approach, rt.CurrentStateName);
+
+            ctx.S.Chase = false; ctx.S.Vision = false; ctx.C.Eligible = false;
+            rt.Tick(0.1f);
+            Assert.AreEqual(SinglePost.Post, rt.CurrentStateName);   // 脱战回 Rest
+        }
+
+        [Test]
+        public void Skeleton_WithDisguiseThenPatrol_DisengagesToPatrol_NotDisguise()
+        {
+            // 唯一 Entry != Rest 的未发现层：出生伪装静止，脱战只回巡逻，伪装态从此不可达。
+            var ctx = new Ctx();
+            var rt = Build(ctx, new DisguiseThenPatrol());
+            Assert.AreEqual(DisguiseThenPatrol.Disguise, rt.CurrentStateName);
+
+            ctx.S.Chase = true; rt.Tick(0.1f);
+            Assert.AreEqual(RushEngagement.Rush, rt.CurrentStateName);
+
+            ctx.S.Chase = false; ctx.S.Vision = false; rt.Tick(0.1f);
+            Assert.AreEqual(DisguiseThenPatrol.Patrol, rt.CurrentStateName);   // 不是 Disguise
+
+            // 再交战一轮，仍然只回巡逻——伪装态不可逆
+            ctx.S.Chase = true;  rt.Tick(0.1f);
+            Assert.AreEqual(RushEngagement.Rush, rt.CurrentStateName);
+            ctx.S.Chase = false; rt.Tick(0.1f);
+            Assert.AreEqual(DisguiseThenPatrol.Patrol, rt.CurrentStateName);
+        }
+
+        [Test]
+        public void EntryCanBeOverridden_ForEnemiesWithPrefixStates()
+        {
+            // 骨架注释承诺的出路：掉落链 / 出场链这类前置态，调 Add 之后再覆盖 Entry。
+            var ctx = new Ctx();
+            var b = new BrainBuilder();
+            PerceptionSkeleton.Add(b, new SinglePost(LocomotionMode.Patrol),
+                                      new RushEngagement("rush", RushExit.OnLostTarget));
+            AiStateFragments.Locomotion(b, "Ceiling", LocomotionMode.Idle)
+                .To(SinglePost.Post).When(x => x.Sensor.SeesPlayer(), "landed");
+            b.Entry("Ceiling");                              // 覆盖骨架设的入口
+
+            var rt = new AiRuntime(b.Build(), ctx);
+            Assert.AreEqual("Ceiling", rt.CurrentStateName);
+
+            ctx.S.Sees = true; rt.Tick(0.1f);
+            Assert.AreEqual(SinglePost.Post, rt.CurrentStateName);   // 落地后并入感知层
+
+            ctx.S.Chase = true; rt.Tick(0.1f);
+            Assert.AreEqual(RushEngagement.Rush, rt.CurrentStateName); // 升级边照常生效
+        }
     }
 }