diff --git a/src/daemon/inbox.py b/src/daemon/inbox.py
index bdfe490..5d9e596 100644
--- a/src/daemon/inbox.py
+++ b/src/daemon/inbox.py
@@ -52,7 +52,6 @@ class InboxWatcher:
 
     async def start(self) -> None:
         """启动监听"""
-        import asyncio
         if self._running:
             return
         self._running = True
@@ -62,7 +61,6 @@ class InboxWatcher:
 
     async def stop(self) -> None:
         """停止监听"""
-        import asyncio
         self._running = False
         if self._task:
             self._task.cancel()
@@ -90,7 +88,6 @@ class InboxWatcher:
     # ------------------------------------------------------------------
 
     async def _loop(self) -> None:
-        import asyncio
         while self._running:
             try:
                 await self.poll()
diff --git a/tests/test_inbox.py b/tests/test_inbox.py
new file mode 100644
index 0000000..a81dc8e
--- /dev/null
+++ b/tests/test_inbox.py
@@ -0,0 +1,246 @@
+"""F7 Inbox JSONL Watcher 单元测试
+
+按测试计划 test-plan-v2.6.md §F7：
+- T1: 写入+消费（P0）
+- T2: truncate（P0）
+- T3: 并发写入（P0）
+- T4: 损坏行恢复（P1）
+- T5: 空文件处理（P1）
+"""
+
+import asyncio
+import json
+import threading
+import pytest
+from pathlib import Path
+
+from src.daemon.inbox import InboxWatcher
+
+
+@pytest.fixture
+def inbox_path(tmp_path):
+    return tmp_path / "inbox" / "daemon.jsonl"
+
+
+@pytest.fixture
+def watcher(inbox_path):
+    return InboxWatcher(inbox_path, watch_interval=0.05)
+
+
+# ---------------------------------------------------------------------------
+# T1: 写入+消费
+# ---------------------------------------------------------------------------
+
+class TestWriteConsume:
+    def test_single_event(self, watcher, inbox_path):
+        """写入单条事件 → 消费到"""
+        event = {"type": "task_done", "task_id": "t1", "agent": "a"}
+        watcher.write_event(event)
+
+        events = watcher.consume()
+        assert len(events) == 1
+        assert events[0]["type"] == "task_done"
+        assert events[0]["task_id"] == "t1"
+
+    def test_multiple_events(self, watcher, inbox_path):
+        """写入多条事件 → 全部消费到"""
+        for i in range(5):
+            watcher.write_event({"type": "progress", "task_id": f"t{i}", "pct": i * 20})
+
+        events = watcher.consume()
+        assert len(events) == 5
+        assert events[0]["task_id"] == "t0"
+        assert events[4]["task_id"] == "t4"
+
+    def test_consume_increments_counter(self, watcher, inbox_path):
+        """total_consumed 递增"""
+        assert watcher.total_consumed == 0
+        watcher.write_event({"type": "test"})
+        watcher.consume()
+        assert watcher.total_consumed == 1
+        watcher.write_event({"type": "test2"})
+        watcher.write_event({"type": "test3"})
+        watcher.consume()
+        assert watcher.total_consumed == 3
+
+    def test_consume_empty_file_returns_empty(self, watcher, inbox_path):
+        """文件不存在时返回空列表"""
+        assert watcher.consume() == []
+
+    def test_static_write(self, inbox_path):
+        """静态方法写入"""
+        InboxWatcher.write_event_to(inbox_path, {"type": "static"})
+        events = InboxWatcher(inbox_path).consume()
+        assert len(events) == 1
+        assert events[0]["type"] == "static"
+
+
+# ---------------------------------------------------------------------------
+# T2: truncate
+# ---------------------------------------------------------------------------
+
+class TestTruncate:
+    def test_file_cleared_after_consume(self, watcher, inbox_path):
+        """消费后文件被清空"""
+        watcher.write_event({"type": "test"})
+        assert inbox_path.exists()
+        assert inbox_path.stat().st_size > 0
+
+        watcher.consume()
+
+        # 文件存在但为空
+        assert inbox_path.exists()
+        assert inbox_path.stat().st_size == 0
+
+    def test_second_consume_returns_empty(self, watcher, inbox_path):
+        """二次消费无新事件"""
+        watcher.write_event({"type": "test"})
+        events1 = watcher.consume()
+        assert len(events1) == 1
+
+        events2 = watcher.consume()
+        assert len(events2) == 0
+
+    def test_write_after_truncate(self, watcher, inbox_path):
+        """truncate 后可以继续写入"""
+        watcher.write_event({"type": "first"})
+        watcher.consume()
+
+        watcher.write_event({"type": "second"})
+        events = watcher.consume()
+        assert len(events) == 1
+        assert events[0]["type"] == "second"
+
+
+# ---------------------------------------------------------------------------
+# T3: 并发写入
+# ---------------------------------------------------------------------------
+
+class TestConcurrentWrite:
+    def test_multi_agent_concurrent(self, inbox_path):
+        """多 Agent 同时写入不同事件，全部消费到"""
+        n_agents = 5
+        n_events_per_agent = 10
+        barrier = threading.Barrier(n_agents)
+
+        def writer(agent_id):
+            barrier.wait()
+            for i in range(n_events_per_agent):
+                InboxWatcher.write_event_to(inbox_path, {
+                    "agent": agent_id,
+                    "seq": i,
+                })
+
+        threads = [threading.Thread(target=writer, args=(f"agent-{j}",))
+                   for j in range(n_agents)]
+        for t in threads:
+            t.start()
+        for t in threads:
+            t.join(timeout=5)
+
+        watcher = InboxWatcher(inbox_path)
+        events = watcher.consume()
+        assert len(events) == n_agents * n_events_per_agent
+
+        # 每个 agent 的事件都到齐
+        agents_seen = {e["agent"] for e in events}
+        assert len(agents_seen) == n_agents
+
+
+# ---------------------------------------------------------------------------
+# T4: 损坏行恢复（P1）
+# ---------------------------------------------------------------------------
+
+class TestBadLineRecovery:
+    def test_skip_invalid_json(self, watcher, inbox_path):
+        """非法 JSON 行跳过不崩溃"""
+        inbox_path.parent.mkdir(parents=True, exist_ok=True)
+        with open(inbox_path, "w") as f:
+            f.write('{"type": "good"}\n')
+            f.write('not json at all\n')
+            f.write('{"type": "also_good"}\n')
+            f.write('{broken json\n')
+
+        events = watcher.consume()
+        assert len(events) == 2
+        assert events[0]["type"] == "good"
+        assert events[1]["type"] == "also_good"
+
+    def test_non_dict_json_skipped(self, watcher, inbox_path):
+        """合法 JSON 但非 dict 也跳过"""
+        inbox_path.parent.mkdir(parents=True, exist_ok=True)
+        with open(inbox_path, "w") as f:
+            f.write('{"type": "good"}\n')
+            f.write('[1, 2, 3]\n')
+            f.write('"just a string"\n')
+            f.write('42\n')
+
+        events = watcher.consume()
+        assert len(events) == 1
+        assert events[0]["type"] == "good"
+
+    def test_empty_lines_skipped(self, watcher, inbox_path):
+        """空行不影响"""
+        inbox_path.parent.mkdir(parents=True, exist_ok=True)
+        with open(inbox_path, "w") as f:
+            f.write('\n\n{"type": "good"}\n\n\n')
+
+        events = watcher.consume()
+        assert len(events) == 1
+
+
+# ---------------------------------------------------------------------------
+# T5: 空文件处理（P1）
+# ---------------------------------------------------------------------------
+
+class TestEmptyFile:
+    def test_empty_file_no_events(self, watcher, inbox_path):
+        """空文件返回空列表"""
+        inbox_path.parent.mkdir(parents=True, exist_ok=True)
+        inbox_path.touch()
+        events = watcher.consume()
+        assert events == []
+
+    def test_whitespace_only_file(self, watcher, inbox_path):
+        """只有空白的文件返回空列表"""
+        inbox_path.parent.mkdir(parents=True, exist_ok=True)
+        inbox_path.write_text("   \n  \n  \n")
+        events = watcher.consume()
+        assert events == []
+
+
+# ---------------------------------------------------------------------------
+# Watcher 生命周期
+# ---------------------------------------------------------------------------
+
+class TestWatcherLifecycle:
+    def test_start_stop(self, watcher, inbox_path):
+        """可以启动和停止"""
+        async def run():
+            await watcher.start()
+            assert watcher.is_running
+            await asyncio.sleep(0.2)
+            await watcher.stop()
+            assert not watcher.is_running
+
+        asyncio.run(run())
+
+    def test_auto_consume_via_callback(self, watcher, inbox_path):
+        """watcher 循环自动消费并通过回调传递事件"""
+        collected = []
+
+        async def on_events(events):
+            collected.extend(events)
+
+        watcher.on_events = on_events
+
+        async def run():
+            await watcher.start()
+            # 写入事件
+            watcher.write_event({"type": "auto"})
+            await asyncio.sleep(0.3)  # 等待 watcher 消费
+            await watcher.stop()
+
+        asyncio.run(run())
+        assert len(collected) >= 1
+        assert collected[0]["type"] == "auto"