diff --git a/src/core/task-parser.ts b/src/core/task-parser.ts
new file mode 100644
index 0000000..48bea45
--- /dev/null
+++ b/src/core/task-parser.ts
@@ -0,0 +1,16 @@
+import type { TaskItem } from "../types.ts";
+
+export function parseTasks(content: string): TaskItem[] {
+  const tasks: TaskItem[] = [];
+  const lines = content.split("\n");
+  for (const line of lines) {
+    const match = line.match(/^[\s]*- \[([ xX])\] (.*)$/);
+    if (match) {
+      tasks.push({
+        checked: match[1] !== " ",
+        text: match[2],
+      });
+    }
+  }
+  return tasks;
+}
diff --git a/tests/core/task-parser.test.ts b/tests/core/task-parser.test.ts
new file mode 100644
index 0000000..15e5c38
--- /dev/null
+++ b/tests/core/task-parser.test.ts
@@ -0,0 +1,54 @@
+import { describe, it, expect } from "bun:test";
+import { parseTasks } from "../../src/core/task-parser.ts";
+
+describe("parseTasks", () => {
+  it("解析标准 checkbox 格式", () => {
+    const content = `- [ ] 任务一
+- [ ] 任务二
+- [x] 任务三`;
+    const tasks = parseTasks(content);
+    expect(tasks).toHaveLength(3);
+    expect(tasks[0]).toEqual({ checked: false, text: "任务一" });
+    expect(tasks[1]).toEqual({ checked: false, text: "任务二" });
+    expect(tasks[2]).toEqual({ checked: true, text: "任务三" });
+  });
+
+  it("跳过非 checkbox 行", () => {
+    const content = `# 标题
+一些描述
+- [ ] 任务一
+普通文本
+- [x] 任务二`;
+    const tasks = parseTasks(content);
+    expect(tasks).toHaveLength(2);
+  });
+
+  it("空内容返回空数组", () => {
+    expect(parseTasks("")).toEqual([]);
+    expect(parseTasks("# 只有标题")).toEqual([]);
+  });
+
+  it("支持大写 X 标记", () => {
+    const content = `- [X] 大写标记`;
+    const tasks = parseTasks(content);
+    expect(tasks).toHaveLength(1);
+    expect(tasks[0].checked).toBe(true);
+  });
+
+  it("支持缩进的 checkbox", () => {
+    const content = `  - [ ] 缩进任务`;
+    const tasks = parseTasks(content);
+    expect(tasks).toHaveLength(1);
+    expect(tasks[0].text).toBe("缩进任务");
+  });
+
+  it("计算已完成和总数", () => {
+    const content = `- [x] 已完成
+- [ ] 未完成
+- [x] 另一个完成`;
+    const tasks = parseTasks(content);
+    const completed = tasks.filter((t) => t.checked).length;
+    expect(completed).toBe(2);
+    expect(tasks.length).toBe(3);
+  });
+});