diff --git a/.changeset/add-behavior-tree-plugin.md b/.changeset/add-behavior-tree-plugin.md
new file mode 100644
index 00000000..20f92bda
--- /dev/null
+++ b/.changeset/add-behavior-tree-plugin.md
@@ -0,0 +1,24 @@
+---
+"@esengine/behavior-tree": minor
+---
+
+feat(behavior-tree): add pure BehaviorTreePlugin class for Cocos/Laya integration
+
+- Added `BehaviorTreePlugin` class that only depends on `@esengine/ecs-framework`
+- Implements `IPlugin` interface with `install()`, `uninstall()`, and `setupScene()` methods
+- Removed `esengine/` subdirectory that incorrectly depended on `@esengine/engine-core`
+- Updated package documentation with correct usage examples
+
+Usage:
+```typescript
+import { Core, Scene } from '@esengine/ecs-framework';
+import { BehaviorTreePlugin, BehaviorTreeBuilder, BehaviorTreeStarter } from '@esengine/behavior-tree';
+
+Core.create();
+const plugin = new BehaviorTreePlugin();
+await Core.installPlugin(plugin);
+
+const scene = new Scene();
+plugin.setupScene(scene);
+Core.setScene(scene);
+```
diff --git a/packages/framework/behavior-tree/src/BehaviorTreePlugin.ts b/packages/framework/behavior-tree/src/BehaviorTreePlugin.ts
new file mode 100644
index 00000000..dc5c6450
--- /dev/null
+++ b/packages/framework/behavior-tree/src/BehaviorTreePlugin.ts
@@ -0,0 +1,118 @@
+import type { Core, ServiceContainer, IPlugin, IScene } from '@esengine/ecs-framework';
+import { BehaviorTreeExecutionSystem } from './execution/BehaviorTreeExecutionSystem';
+import { BehaviorTreeAssetManager } from './execution/BehaviorTreeAssetManager';
+import { GlobalBlackboardService } from './Services/GlobalBlackboardService';
+
+/**
+ * @zh 行为树插件
+ * @en Behavior Tree Plugin
+ *
+ * @zh 为 ECS 框架提供行为树支持的插件。
+ * 可与任何基于 @esengine/ecs-framework 的引擎集成（Cocos、Laya、Node.js 等）。
+ *
+ * @en Plugin that provides behavior tree support for ECS framework.
+ * Can be integrated with any engine based on @esengine/ecs-framework (Cocos, Laya, Node.js, etc.).
+ *
+ * @example
+ * ```typescript
+ * import { Core, Scene } from '@esengine/ecs-framework';
+ * import { BehaviorTreePlugin, BehaviorTreeBuilder, BehaviorTreeStarter } from '@esengine/behavior-tree';
+ *
+ * // Initialize
+ * Core.create();
+ * const plugin = new BehaviorTreePlugin();
+ * await Core.installPlugin(plugin);
+ *
+ * // Setup scene
+ * const scene = new Scene();
+ * plugin.setupScene(scene);
+ * Core.setScene(scene);
+ *
+ * // Create and start behavior tree
+ * const tree = BehaviorTreeBuilder.create('MyAI')
+ *     .selector('Root')
+ *         .log('Hello from behavior tree!')
+ *     .end()
+ *     .build();
+ *
+ * const entity = scene.createEntity('AIEntity');
+ * BehaviorTreeStarter.start(entity, tree);
+ * ```
+ */
+export class BehaviorTreePlugin implements IPlugin {
+    /**
+     * @zh 插件名称
+     * @en Plugin name
+     */
+    readonly name = '@esengine/behavior-tree';
+
+    /**
+     * @zh 插件版本
+     * @en Plugin version
+     */
+    readonly version = '1.0.0';
+
+    /**
+     * @zh 插件依赖
+     * @en Plugin dependencies
+     */
+    readonly dependencies: readonly string[] = [];
+
+    private _services: ServiceContainer | null = null;
+
+    /**
+     * @zh 安装插件
+     * @en Install plugin
+     *
+     * @param _core - Core 实例
+     * @param services - 服务容器
+     */
+    install(_core: Core, services: ServiceContainer): void {
+        this._services = services;
+
+        // Register services
+        if (!services.isRegistered(GlobalBlackboardService)) {
+            services.registerSingleton(GlobalBlackboardService);
+        }
+        if (!services.isRegistered(BehaviorTreeAssetManager)) {
+            services.registerSingleton(BehaviorTreeAssetManager);
+        }
+    }
+
+    /**
+     * @zh 卸载插件
+     * @en Uninstall plugin
+     */
+    uninstall(): void {
+        if (this._services) {
+            const assetManager = this._services.tryResolve(BehaviorTreeAssetManager);
+            if (assetManager) {
+                assetManager.dispose();
+            }
+
+            const blackboardService = this._services.tryResolve(GlobalBlackboardService);
+            if (blackboardService) {
+                blackboardService.dispose();
+            }
+        }
+        this._services = null;
+    }
+
+    /**
+     * @zh 设置场景，添加行为树执行系统
+     * @en Setup scene, add behavior tree execution system
+     *
+     * @param scene - 要设置的场景
+     *
+     * @example
+     * ```typescript
+     * const scene = new Scene();
+     * plugin.setupScene(scene);
+     * Core.setScene(scene);
+     * ```
+     */
+    setupScene(scene: IScene): void {
+        const system = new BehaviorTreeExecutionSystem(this._services ?? undefined);
+        scene.addSystem(system);
+    }
+}
diff --git a/packages/framework/behavior-tree/src/esengine/BehaviorTreeLoader.ts b/packages/framework/behavior-tree/src/esengine/BehaviorTreeLoader.ts
deleted file mode 100644
index 3950031e..00000000
--- a/packages/framework/behavior-tree/src/esengine/BehaviorTreeLoader.ts
+++ /dev/null
@@ -1,82 +0,0 @@
-/**
- * @zh ESEngine 资产加载器
- * @en ESEngine asset loader
- *
- * @zh 实现 IAssetLoader 接口，用于通过 AssetManager 加载行为树文件。
- * 此文件仅在使用 ESEngine 时需要。
- *
- * @en Implements IAssetLoader interface for loading behavior tree files via AssetManager.
- * This file is only needed when using ESEngine.
- */
-
-import type {
-    IAssetLoader,
-    IAssetParseContext,
-    IAssetContent,
-    AssetContentType
-} from '@esengine/asset-system';
-import { Core } from '@esengine/ecs-framework';
-import { BehaviorTreeData } from '../execution/BehaviorTreeData';
-import { BehaviorTreeAssetManager } from '../execution/BehaviorTreeAssetManager';
-import { EditorToBehaviorTreeDataConverter } from '../Serialization/EditorToBehaviorTreeDataConverter';
-import { BehaviorTreeAssetType } from '../constants';
-
-/**
- * @zh 行为树资产接口
- * @en Behavior tree asset interface
- */
-export interface IBehaviorTreeAsset {
-    /** @zh 行为树数据 @en Behavior tree data */
-    data: BehaviorTreeData;
-    /** @zh 文件路径 @en File path */
-    path: string;
-}
-
-/**
- * @zh 行为树加载器
- * @en Behavior tree loader implementing IAssetLoader interface
- */
-export class BehaviorTreeLoader implements IAssetLoader<IBehaviorTreeAsset> {
-    readonly supportedType = BehaviorTreeAssetType;
-    readonly supportedExtensions = ['.btree'];
-    readonly contentType: AssetContentType = 'text';
-
-    /**
-     * @zh 从内容解析行为树资产
-     * @en Parse behavior tree asset from content
-     */
-    async parse(content: IAssetContent, context: IAssetParseContext): Promise<IBehaviorTreeAsset> {
-        if (!content.text) {
-            throw new Error('Behavior tree content is empty');
-        }
-
-        // Convert to runtime data
-        const treeData = EditorToBehaviorTreeDataConverter.fromEditorJSON(content.text);
-
-        // Use file path as ID
-        const assetPath = context.metadata.path;
-        treeData.id = assetPath;
-
-        // Also register to BehaviorTreeAssetManager for legacy code
-        const btAssetManager = Core.services.tryResolve(BehaviorTreeAssetManager);
-        if (btAssetManager) {
-            btAssetManager.loadAsset(treeData);
-        }
-
-        return {
-            data: treeData,
-            path: assetPath
-        };
-    }
-
-    /**
-     * @zh 释放资产
-     * @en Dispose asset
-     */
-    dispose(asset: IBehaviorTreeAsset): void {
-        const btAssetManager = Core.services.tryResolve(BehaviorTreeAssetManager);
-        if (btAssetManager && asset.data) {
-            btAssetManager.unloadAsset(asset.data.id);
-        }
-    }
-}
diff --git a/packages/framework/behavior-tree/src/esengine/BehaviorTreeRuntimeModule.ts b/packages/framework/behavior-tree/src/esengine/BehaviorTreeRuntimeModule.ts
deleted file mode 100644
index 5a08dbcb..00000000
--- a/packages/framework/behavior-tree/src/esengine/BehaviorTreeRuntimeModule.ts
+++ /dev/null
@@ -1,93 +0,0 @@
-/**
- * @zh ESEngine 集成模块
- * @en ESEngine integration module
- *
- * @zh 此文件包含与 ESEngine 引擎核心集成的代码。
- * 使用 Cocos/Laya 等其他引擎时不需要此文件。
- *
- * @en This file contains code for integrating with ESEngine engine-core.
- * Not needed when using other engines like Cocos/Laya.
- */
-
-import type { IScene, ServiceContainer, IComponentRegistry } from '@esengine/ecs-framework';
-import type { IRuntimeModule, IRuntimePlugin, ModuleManifest, SystemContext } from '@esengine/engine-core';
-import { AssetManagerToken } from '@esengine/asset-system';
-
-import { BehaviorTreeRuntimeComponent } from '../execution/BehaviorTreeRuntimeComponent';
-import { BehaviorTreeExecutionSystem } from '../execution/BehaviorTreeExecutionSystem';
-import { BehaviorTreeAssetManager } from '../execution/BehaviorTreeAssetManager';
-import { GlobalBlackboardService } from '../Services/GlobalBlackboardService';
-import { BehaviorTreeLoader } from './BehaviorTreeLoader';
-import { BehaviorTreeAssetType } from '../constants';
-import { BehaviorTreeSystemToken } from '../tokens';
-
-// Re-export tokens for ESEngine users
-export { BehaviorTreeSystemToken } from '../tokens';
-
-class BehaviorTreeRuntimeModule implements IRuntimeModule {
-    private _loaderRegistered = false;
-
-    registerComponents(registry: IComponentRegistry): void {
-        registry.register(BehaviorTreeRuntimeComponent);
-    }
-
-    registerServices(services: ServiceContainer): void {
-        if (!services.isRegistered(GlobalBlackboardService)) {
-            services.registerSingleton(GlobalBlackboardService);
-        }
-        if (!services.isRegistered(BehaviorTreeAssetManager)) {
-            services.registerSingleton(BehaviorTreeAssetManager);
-        }
-    }
-
-    createSystems(scene: IScene, context: SystemContext): void {
-        // Get dependencies from service registry
-        const assetManager = context.services.get(AssetManagerToken);
-
-        if (!this._loaderRegistered && assetManager) {
-            assetManager.registerLoader(BehaviorTreeAssetType, new BehaviorTreeLoader());
-            this._loaderRegistered = true;
-        }
-
-        // Use ECS service container from context.services
-        const ecsServices = (context as { ecsServices?: ServiceContainer }).ecsServices;
-        const behaviorTreeSystem = new BehaviorTreeExecutionSystem(ecsServices);
-
-        if (assetManager) {
-            behaviorTreeSystem.setAssetManager(assetManager);
-        }
-
-        if (context.isEditor) {
-            behaviorTreeSystem.enabled = false;
-        }
-
-        scene.addSystem(behaviorTreeSystem);
-
-        // Register service to service registry
-        context.services.register(BehaviorTreeSystemToken, behaviorTreeSystem);
-    }
-}
-
-const manifest: ModuleManifest = {
-    id: 'behavior-tree',
-    name: '@esengine/behavior-tree',
-    displayName: 'Behavior Tree',
-    version: '1.0.0',
-    description: 'AI behavior tree system',
-    category: 'AI',
-    icon: 'GitBranch',
-    isCore: false,
-    defaultEnabled: false,
-    isEngineModule: true,
-    canContainContent: true,
-    dependencies: ['core'],
-    exports: { components: ['BehaviorTreeComponent'] },
-    editorPackage: '@esengine/behavior-tree-editor'
-};
-
-export const BehaviorTreePlugin: IRuntimePlugin = {
-    manifest,
-    runtimeModule: new BehaviorTreeRuntimeModule()
-};
-
-export { BehaviorTreeRuntimeModule };
diff --git a/packages/framework/behavior-tree/src/esengine/index.ts b/packages/framework/behavior-tree/src/esengine/index.ts
deleted file mode 100644
index a3e7b333..00000000
--- a/packages/framework/behavior-tree/src/esengine/index.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-/**
- * @zh ESEngine 集成入口
- * @en ESEngine integration entry point
- *
- * @zh 此模块包含与 ESEngine 引擎核心集成所需的所有代码。
- * 使用 Cocos/Laya 等其他引擎时，只需导入主模块即可。
- *
- * @en This module contains all code required for ESEngine engine-core integration.
- * When using other engines like Cocos/Laya, just import the main module.
- *
- * @example ESEngine 使用方式 / ESEngine usage:
- * ```typescript
- * import { BehaviorTreePlugin } from '@esengine/behavior-tree/esengine';
- *
- * // Register with ESEngine plugin system
- * engine.registerPlugin(BehaviorTreePlugin);
- * ```
- *
- * @example Cocos/Laya 使用方式 / Cocos/Laya usage:
- * ```typescript
- * import {
- *     BehaviorTreeAssetManager,
- *     BehaviorTreeExecutionSystem
- * } from '@esengine/behavior-tree';
- *
- * // Load behavior tree from JSON
- * const assetManager = new BehaviorTreeAssetManager();
- * assetManager.loadFromEditorJSON(jsonContent);
- *
- * // Add system to your ECS world
- * world.addSystem(new BehaviorTreeExecutionSystem());
- * ```
- */
-
-// Runtime module and plugin
-export { BehaviorTreeRuntimeModule, BehaviorTreePlugin, BehaviorTreeSystemToken } from './BehaviorTreeRuntimeModule';
-
-// Asset loader for ESEngine asset-system
-export { BehaviorTreeLoader, type IBehaviorTreeAsset } from './BehaviorTreeLoader';
diff --git a/packages/framework/behavior-tree/src/index.ts b/packages/framework/behavior-tree/src/index.ts
index b64ed331..ac442c9f 100644
--- a/packages/framework/behavior-tree/src/index.ts
+++ b/packages/framework/behavior-tree/src/index.ts
@@ -4,32 +4,44 @@
  * @zh AI 行为树系统，支持运行时执行和可视化编辑
  * @en AI Behavior Tree System with runtime execution and visual editor support
  *
- * @zh 此包是通用的行为树实现，可以与任何 ECS 框架配合使用。
- * 对于 ESEngine 集成，请从 '@esengine/behavior-tree/esengine' 导入插件。
+ * @zh 此包是通用的行为树实现，可以与任何基于 @esengine/ecs-framework 的引擎集成
+ * （Cocos Creator、LayaAir、Node.js 等）。
  *
- * @en This package is a generic behavior tree implementation that works with any ECS framework.
- * For ESEngine integration, import the plugin from '@esengine/behavior-tree/esengine'.
+ * @en This package is a generic behavior tree implementation that works with any engine
+ * based on @esengine/ecs-framework (Cocos Creator, LayaAir, Node.js, etc.).
  *
- * @example Cocos/Laya/通用 ECS 使用方式:
+ * @example
  * ```typescript
+ * import { Core, Scene } from '@esengine/ecs-framework';
  * import {
- *     BehaviorTreeAssetManager,
- *     BehaviorTreeExecutionSystem,
- *     BehaviorTreeRuntimeComponent
+ *     BehaviorTreePlugin,
+ *     BehaviorTreeBuilder,
+ *     BehaviorTreeStarter
  * } from '@esengine/behavior-tree';
  *
- * // 1. Register service
- * Core.services.registerSingleton(BehaviorTreeAssetManager);
+ * // 1. Initialize Core and install plugin
+ * Core.create();
+ * const plugin = new BehaviorTreePlugin();
+ * await Core.installPlugin(plugin);
  *
- * // 2. Load behavior tree from JSON
- * const assetManager = Core.services.resolve(BehaviorTreeAssetManager);
- * assetManager.loadFromEditorJSON(jsonContent);
+ * // 2. Create scene and setup behavior tree system
+ * const scene = new Scene();
+ * plugin.setupScene(scene);
+ * Core.setScene(scene);
  *
- * // 3. Add component to entity
- * entity.addComponent(new BehaviorTreeRuntimeComponent());
+ * // 3. Build behavior tree
+ * const tree = BehaviorTreeBuilder.create('MyAI')
+ *     .selector('Root')
+ *         .log('Hello!')
+ *     .end()
+ *     .build();
  *
- * // 4. Add system to scene
- * scene.addSystem(new BehaviorTreeExecutionSystem());
+ * // 4. Start behavior tree on entity
+ * const entity = scene.createEntity('AIEntity');
+ * BehaviorTreeStarter.start(entity, tree);
+ *
+ * // 5. Run game loop
+ * setInterval(() => Core.update(0.016), 16);
  * ```
  *
  * @packageDocumentation
@@ -65,3 +77,6 @@ export { BlackboardTypes } from './Blackboard/BlackboardTypes';
 
 // Service tokens (using ecs-framework's createServiceToken, not engine-core)
 export { BehaviorTreeSystemToken } from './tokens';
+
+// Plugin
+export { BehaviorTreePlugin } from './BehaviorTreePlugin';