diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 97d9a97..9d0d3bd 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -1,2 +1,10 @@
-// @visionl/core — placeholder, to be implemented in Task 2
-export const VERSION = '0.1.0';
+export { type PageInfo } from './types/page.js';
+export { type ApiResponse, ErrorCode } from './types/api.js';
+export { type WsEvent } from './types/ws.js';
+export {
+  type FingerprintProfile,
+  type FingerprintPermissions,
+  type FingerprintBehavior,
+  type CanvasNoiseConfig,
+  type PermissionState,
+} from './types/fingerprint.js';
diff --git a/packages/core/src/types/api.ts b/packages/core/src/types/api.ts
new file mode 100644
index 0000000..0b5d798
--- /dev/null
+++ b/packages/core/src/types/api.ts
@@ -0,0 +1,18 @@
+// API request/response types / API 请求响应类型
+export interface ApiResponse<T = unknown> {
+  ok: boolean;
+  data?: T;
+  error?: {
+    code: ErrorCode;
+    message: string;
+  };
+}
+
+export enum ErrorCode {
+  PAGE_NOT_FOUND = 'PAGE_NOT_FOUND',
+  DAEMON_UNREACHABLE = 'DAEMON_UNREACHABLE',
+  INVALID_URL = 'INVALID_URL',
+  ALIAS_EXISTS = 'ALIAS_EXISTS',
+  TIMEOUT = 'TIMEOUT',
+  INTERNAL = 'INTERNAL',
+}
diff --git a/packages/core/src/types/fingerprint.ts b/packages/core/src/types/fingerprint.ts
new file mode 100644
index 0000000..dc25395
--- /dev/null
+++ b/packages/core/src/types/fingerprint.ts
@@ -0,0 +1,37 @@
+// Fingerprint profile type definitions / 指纹配置类型定义
+export type PermissionState = 'prompt' | 'granted' | 'denied';
+
+export interface FingerprintPermissions {
+  notifications: PermissionState;
+  geolocation: PermissionState;
+  camera: PermissionState;
+  microphone: PermissionState;
+}
+
+export interface CanvasNoiseConfig {
+  enabled: boolean;
+  strength: number; // 0-1 / 噪声强度 0-1
+}
+
+export interface FingerprintBehavior {
+  mouseMoveDelay: { min: number; max: number };
+  keyPressDelay: { min: number; max: number };
+  scrollStepDelay: { min: number; max: number };
+}
+
+export interface FingerprintProfile {
+  id: string;
+  name: string;
+  userAgent: string;
+  platform: string;
+  languages: string[];
+  acceptLanguage: string;
+  screen: { width: number; height: number; colorDepth: number; pixelRatio: number };
+  viewport: { width: number; height: number };
+  webgl: { vendor: string; renderer: string };
+  timezone: string;
+  geolocation?: { latitude: number; longitude: number; accuracy: number };
+  permissions: FingerprintPermissions;
+  behavior: FingerprintBehavior;
+  canvasNoise: CanvasNoiseConfig;
+}
diff --git a/packages/core/src/types/page.ts b/packages/core/src/types/page.ts
new file mode 100644
index 0000000..5b1e771
--- /dev/null
+++ b/packages/core/src/types/page.ts
@@ -0,0 +1,9 @@
+// Page state type definitions / 页面状态类型定义
+export interface PageInfo {
+  id: string;
+  url: string;
+  alias?: string;
+  title: string;
+  status: 'active' | 'crashed';
+  profile: string;
+}
diff --git a/packages/core/src/types/ws.ts b/packages/core/src/types/ws.ts
new file mode 100644
index 0000000..e96b442
--- /dev/null
+++ b/packages/core/src/types/ws.ts
@@ -0,0 +1,10 @@
+// WebSocket event type definitions / WebSocket 事件类型定义
+import type { PageInfo } from './page.js';
+
+export type WsEvent =
+  | { type: 'page:created'; data: PageInfo }
+  | { type: 'page:closed'; data: { id: string } }
+  | { type: 'page:navigated'; data: { id: string; url: string; title: string } }
+  | { type: 'page:crashed'; data: { id: string; error: string } }
+  | { type: 'page:console'; data: { id: string; level: string; text: string } }
+  | { type: 'page:detection:warning'; data: { id: string; level: string; detail: string } };