diff --git a/game-runtime/evidence/integration/evidence.json b/game-runtime/evidence/integration/evidence.json
index 588770ac..356ada2c 100644
--- a/game-runtime/evidence/integration/evidence.json
+++ b/game-runtime/evidence/integration/evidence.json
@@ -1,6 +1,6 @@
 {
   "meta": {
-    "ts": "2026-06-12T12:29:25.919Z",
+    "ts": "2026-06-13T05:14:05.317Z",
     "base": "http://localhost:4321",
     "cdpHttp": "http://localhost:9222",
     "seed": 305441741,
@@ -11,233 +11,16 @@
     "dpr": 2,
     "note": "core-protocol-v0 host-dev 集成证据（α 不接 littlejsengine）"
   },
-  "smoke": {
-    "protocol": "core-protocol-v0",
-    "anchors": [
-      "t_boot",
-      "t_plugins_ready",
-      "t_game_init",
-      "t_first_paint",
-      "t_input_bound",
-      "t_game_start"
-    ],
-    "recordCount": 6,
-    "verify": {
-      "ok": true
-    },
-    "uncaught": [],
-    "registeredPlugins": [
-      "collision",
-      "physics-lite",
-      "gamefeel",
-      "particles-juice",
-      "palette-post",
-      "save-progress",
-      "audio-music",
-      "example",
-      "runtime-probe"
-    ],
-    "initOk": true,
-    "initErrors": []
-  },
-  "firstInput": {
-    "beforeRecords": 6,
-    "afterRecords": 7,
-    "detail": {
-      "total": 7,
-      "firstInputCount": 1,
-      "sample": {
-        "seq": 6,
-        "anchor": "t_input_bound",
-        "tMono": 150,
-        "buildSha": "",
-        "pluginSet": [
-          "audio-music",
-          "collision",
-          "example",
-          "gamefeel",
-          "palette-post",
-          "particles-juice",
-          "physics-lite",
-          "runtime-probe",
-          "save-progress"
-        ],
-        "prevHash": "77ab8a73",
-        "hash": "7986e506",
-        "extra": {
-          "firstInput": true,
-          "type": "pointerdown"
-        },
-        "warning": "duplicate_anchor;out_of_order"
-      }
-    }
-  },
-  "vfx": {
-    "burst": {
-      "seed": 1001,
-      "frames": 12,
-      "hashes": [
-        "c53f293e",
-        "c53f293e",
-        "c53f293e"
-      ],
-      "consistent": true,
-      "nonEmpty": true,
-      "hasContent": true,
-      "histogramTop": [
-        {
-          "color": "r0g0b0",
-          "count": 1313579
-        },
-        {
-          "color": "r11g19b23",
-          "count": 449
-        },
-        {
-          "color": "r10g17b21",
-          "count": 420
-        },
-        {
-          "color": "r11g18b22",
-          "count": 353
-        },
-        {
-          "color": "r11g18b23",
-          "count": 301
-        }
-      ],
-      "geometry": [
-        {
-          "region": {
-            "x": 120,
-            "y": 580,
-            "w": 540,
-            "h": 540,
-            "expect": "non-empty"
-          },
-          "pass": true,
-          "opaquePixels": 291600
-        }
-      ]
-    },
-    "trail": {
-      "seed": 2002,
-      "frames": 20,
-      "hashes": [
-        "7c62d75d",
-        "7c62d75d",
-        "7c62d75d"
-      ],
-      "consistent": true,
-      "nonEmpty": true,
-      "hasContent": true,
-      "histogramTop": [
-        {
-          "color": "r0g0b0",
-          "count": 1316295
-        },
-        {
-          "color": "r15g25b31",
-          "count": 153
-        },
-        {
-          "color": "r3g5b6",
-          "count": 30
-        },
-        {
-          "color": "r14g24b29",
-          "count": 16
-        },
-        {
-          "color": "r0g1b1",
-          "count": 14
-        }
-      ],
-      "geometry": [
-        {
-          "region": {
-            "x": 120,
-            "y": 580,
-            "w": 540,
-            "h": 540,
-            "expect": "non-empty"
-          },
-          "pass": true,
-          "opaquePixels": 291600
-        }
-      ]
-    },
-    "drift": {
-      "seed": 3003,
-      "frames": 40,
-      "hashes": [
-        "b9265b7a",
-        "b9265b7a",
-        "b9265b7a"
-      ],
-      "consistent": true,
-      "nonEmpty": true,
-      "hasContent": true,
-      "histogramTop": [
-        {
-          "color": "r0g0b0",
-          "count": 1316171
-        },
-        {
-          "color": "r13g21b26",
-          "count": 51
-        },
-        {
-          "color": "r9g16b19",
-          "count": 45
-        },
-        {
-          "color": "r15g24b30",
-          "count": 43
-        },
-        {
-          "color": "r14g23b28",
-          "count": 38
-        }
-      ],
-      "geometry": [
-        {
-          "region": {
-            "x": 60,
-            "y": 580,
-            "w": 660,
-            "h": 720,
-            "expect": "non-empty"
-          },
-          "pass": true,
-          "opaquePixels": 475200
-        }
-      ]
-    }
-  },
-  "palette": {
-    "vignette": {
-      "seed": 5005,
-      "frames": 30,
-      "hashOff": "ce26c98e",
-      "hashOn": "b48da7ef",
-      "differ": true,
-      "bothNonEmpty": true
-    },
-    "dither": {
-      "seed": 6006,
-      "frames": 30,
-      "hashOff": "2c23d9b8",
-      "hashOn": "c62e4397",
-      "differ": true,
-      "bothNonEmpty": true
-    }
-  },
+  "smoke": null,
+  "firstInput": null,
+  "vfx": {},
+  "palette": {},
   "gates": {
-    "smoke": true,
-    "vfx": true,
-    "firstInput": true
+    "smoke": false,
+    "vfx": false,
+    "firstInput": false
   },
+  "fatal": "AggregateError",
   "failures": [],
-  "pass": true
+  "pass": false
 }
\ No newline at end of file
diff --git a/game-runtime/src/core/plugin.js b/game-runtime/src/core/plugin.js
index a1ac00b1..4c491636 100644
--- a/game-runtime/src/core/plugin.js
+++ b/game-runtime/src/core/plugin.js
@@ -393,6 +393,12 @@ function createHostDevContext(opts) {
   let audioCtx = null;
   // 无工厂告警只发一次的闸（防每帧刷屏）。
   let audioWarned = false;
+  // 引擎能力背书工厂（可空，T1b-β）：lazy 创建，全 host 共享同一引擎能力面。host-dev 桩缺省无工厂→getEngine 返 null。
+  const engineFactory = typeof o.engineFactory === 'function' ? o.engineFactory : null;
+  /** @type {EngineCapabilities|null} lazy 创建后的引擎能力面缓存（null=尚未创建或无工厂）。 */
+  let engineCaps = null;
+  // 无工厂告警只发一次的闸（防每帧刷屏）。
+  let engineWarned = false;
 
   // 帧回调表：用 Map 以便精确按句柄注销（key=自增 id）
   /** @type {Map<number, (dt:number, frame:number)=>void>} */
@@ -424,6 +430,31 @@ function createHostDevContext(opts) {
     return audioCtx;
   }
 
+  /**
+   * lazy 获取受控引擎能力面（全 host 共享，T1b-β）。无工厂 → 返回 null 并告警一次（不抛错）。
+   * host-dev/node 桩无引擎，缺省返 null；集成段注入真实工厂（封装 littlejsengine：ParticleEmitter/zzfxG/zzfxM/lerp/smoothStep）。
+   * @returns {EngineCapabilities|null}
+   */
+  function getEngineShared() {
+    if (engineCaps) return engineCaps; // 已创建：返回同一实例（lazy 单例）。
+    if (!engineFactory) {
+      // 无工厂：插件容错降级——返回 null，仅首次告警一次（绝不抛错）。
+      if (!engineWarned) {
+        logWarn('[host-dev engine] 未注入 engineFactory，getEngine 返回 null（插件须容错降级：粒子退受控面自管/合成核退 vendored/数学退内置；集成段注入真实背书）');
+        engineWarned = true;
+      }
+      return null;
+    }
+    try {
+      engineCaps = engineFactory();
+    } catch (e) {
+      // 工厂抛错也降级为 null（不连坐插件），记 stderr。
+      logError('[host-dev engine] engineFactory 抛错，getEngine 降级返回 null', e);
+      engineCaps = null;
+    }
+    return engineCaps;
+  }
+
   /**
    * 构造一个受控上下文（共享 canvas/帧/时间/输入桥/音频，random 按入参独立）。
    * @param {any} scope 输入订阅作用域（null=直接用；插件对象=注册器派生，用于 dispose 定向回收）。
@@ -455,6 +486,10 @@ function createHostDevContext(opts) {
         // lazy 受控音频上下文（共享单例）；无工厂返回 null 并告警一次（不抛错）。
         return getAudioContextShared();
       },
+      getEngine() {
+        // lazy 受控引擎能力面（共享单例，T1b-β）；host-dev 无工厂返回 null 并告警一次（插件须容错降级）。
+        return getEngineShared();
+      },
       time,
       random,
     };