diff --git a/src/shared/lib/request-context.test.ts b/src/shared/lib/request-context.test.ts
new file mode 100644
index 0000000..f0bd509
--- /dev/null
+++ b/src/shared/lib/request-context.test.ts
@@ -0,0 +1,45 @@
+import { describe, it, expect } from "vitest"
+import {
+  requestContextStorage,
+  getRequestContext,
+} from "./request-context"
+
+describe("request-context", () => {
+  describe("getRequestContext (无上下文)", () => {
+    it("返回空对象", () => {
+      expect(getRequestContext()).toEqual({})
+    })
+  })
+
+  describe("requestContextStorage.run (有上下文)", () => {
+    it("在 run 回调内 getRequestContext 返回注入的上下文", () => {
+      const ctx = { requestId: "req-123", userId: "user-456" }
+      requestContextStorage.run(ctx, () => {
+        expect(getRequestContext()).toEqual(ctx)
+      })
+    })
+
+    it("run 回调返回值正常透传", () => {
+      const result = requestContextStorage.run(
+        { requestId: "req-789" },
+        () => "return-value"
+      )
+      expect(result).toBe("return-value")
+    })
+
+    it("嵌套 run 内层覆盖外层", () => {
+      requestContextStorage.run({ requestId: "outer" }, () => {
+        expect(getRequestContext().requestId).toBe("outer")
+        requestContextStorage.run({ requestId: "inner" }, () => {
+          expect(getRequestContext().requestId).toBe("inner")
+        })
+        expect(getRequestContext().requestId).toBe("outer")
+      })
+    })
+
+    it("run 回调退出后 getRequestContext 恢复为空", () => {
+      requestContextStorage.run({ requestId: "temp" }, () => {})
+      expect(getRequestContext()).toEqual({})
+    })
+  })
+})
diff --git a/src/shared/lib/request-context.ts b/src/shared/lib/request-context.ts
new file mode 100644
index 0000000..103490e
--- /dev/null
+++ b/src/shared/lib/request-context.ts
@@ -0,0 +1,27 @@
+import { AsyncLocalStorage } from "node:async_hooks"
+
+/**
+ * 请求上下文，贯穿整个请求生命周期。
+ *
+ * 仅在 Node.js Runtime 中可用（proxy.ts 是 Edge Runtime，不导入此模块）。
+ * 通过 withRequestContext 高阶函数注入。
+ */
+export interface RequestContext {
+  requestId: string
+  userId?: string
+  module?: string
+}
+
+export const requestContextStorage = new AsyncLocalStorage<RequestContext>()
+
+/**
+ * 获取当前请求上下文（若存在）。
+ *
+ * - 在 withRequestContext 包装的调用栈内：返回完整上下文
+ * - 在调用栈外（如顶层模块初始化、定时任务）：返回空对象
+ *
+ * pino logger 的 mixin 配置会自动调用此函数混入 requestId。
+ */
+export function getRequestContext(): Partial<RequestContext> {
+  return requestContextStorage.getStore() ?? {}
+}