diff --git a/src/daemon/inbox.py b/src/daemon/inbox.py
new file mode 100644
index 0000000..7b31684
--- /dev/null
+++ b/src/daemon/inbox.py
@@ -0,0 +1,187 @@
+"""Inbox JSONL Watcher — 秒级事件推送
+
+Agent 完成任务后写 JSONL 到 inbox/daemon.jsonl，Daemon 秒级轮询消费。
+
+设计要点：
+- JSONL 格式（每行一个 JSON 对象）
+- truncate 清空（不删除文件），避免并发写入时文件不存在
+- 损坏行跳过不崩溃
+- 空文件不触发处理
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+import logging
+import os
+from pathlib import Path
+from typing import Any, Callable, Coroutine, Dict, List, Optional
+
+logger = logging.getLogger("moziplus-v2.inbox")
+
+
+class InboxWatcher:
+    """Inbox JSONL 文件监控器"""
+
+    def __init__(
+        self,
+        inbox_path: Path,
+        watch_interval: float = 1.0,
+        on_events: Optional[Callable[[List[Dict[str, Any]]], Coroutine[Any, Any, None]]] = None,
+    ):
+        """
+        Args:
+            inbox_path: JSONL 文件路径（如 inbox/daemon.jsonl）
+            watch_interval: 轮询间隔秒数
+            on_events: 消费到事件后的回调
+        """
+        self.inbox_path = inbox_path
+        self.watch_interval = watch_interval
+        self.on_events = on_events
+
+        self._running: bool = False
+        self._task: Optional[asyncio.Task] = None
+        self._total_consumed: int = 0
+
+    # ------------------------------------------------------------------
+    # 生命周期
+    # ------------------------------------------------------------------
+
+    async def start(self) -> None:
+        """启动 watcher"""
+        if self._running:
+            return
+        self._running = True
+        import asyncio
+        self._task = asyncio.create_task(self._loop())
+        logger.info("Inbox watcher started (path=%s, interval=%.1fs)",
+                     self.inbox_path, self.watch_interval)
+
+    async def stop(self) -> None:
+        """停止 watcher"""
+        self._running = False
+        if self._task:
+            self._task.cancel()
+            try:
+                await self._task
+            except asyncio.CancelledError:
+                pass
+        logger.info("Inbox watcher stopped (consumed=%d)", self._total_consumed)
+
+    @property
+    def total_consumed(self) -> int:
+        return self._total_consumed
+
+    @property
+    def is_running(self) -> bool:
+        return self._running
+
+    # ------------------------------------------------------------------
+    # 主循环
+    # ------------------------------------------------------------------
+
+    async def _loop(self) -> None:
+        import asyncio
+        while self._running:
+            try:
+                events = self.consume()
+                if events and self.on_events:
+                    await self.on_events(events)
+            except asyncio.CancelledError:
+                raise
+            except Exception:
+                logger.exception("Inbox watcher error")
+
+            try:
+                await asyncio.sleep(self.watch_interval)
+            except asyncio.CancelledError:
+                return
+
+    # ------------------------------------------------------------------
+    # 消费逻辑
+    # ------------------------------------------------------------------
+
+    def consume(self) -> List[Dict[str, Any]]:
+        """消费 JSONL 文件中的所有事件，然后 truncate
+
+        Returns:
+            解析成功的事件列表
+        """
+        if not self.inbox_path.exists():
+            return []
+
+        try:
+            file_size = self.inbox_path.stat().st_size
+        except OSError:
+            return []
+
+        if file_size == 0:
+            return []
+
+        # 读取全部内容
+        try:
+            raw = self.inbox_path.read_text(encoding="utf-8")
+        except OSError:
+            return []
+
+        if not raw.strip():
+            return []
+
+        # 解析每一行
+        events: List[Dict[str, Any]] = []
+        bad_lines: int = 0
+        for line_num, line in enumerate(raw.splitlines(), 1):
+            line = line.strip()
+            if not line:
+                continue
+            try:
+                event = json.loads(line)
+                if isinstance(event, dict):
+                    events.append(event)
+                else:
+                    bad_lines += 1
+                    logger.warning("Inbox line %d: not a JSON object, skipping", line_num)
+            except json.JSONDecodeError as e:
+                bad_lines += 1
+                logger.warning("Inbox line %d: invalid JSON (%s), skipping", line_num, e)
+
+        # Truncate（清空不删除）
+        try:
+            with open(self.inbox_path, "w", encoding="utf-8") as f:
+                f.truncate(0)
+        except OSError as e:
+            logger.error("Failed to truncate inbox: %s", e)
+
+        if bad_lines > 0:
+            logger.warning("Inbox: %d bad lines skipped", bad_lines)
+
+        self._total_consumed += len(events)
+        if events:
+            logger.debug("Inbox consumed %d events", len(events))
+
+        return events
+
+    # ------------------------------------------------------------------
+    # 写入辅助（Agent 端使用）
+    # ------------------------------------------------------------------
+
+    def write_event(self, event: Dict[str, Any]) -> None:
+        """追加一条事件到 JSONL 文件
+
+        Agent 端调用此方法写入事件。
+        使用 O_APPEND 模式确保并发写入安全。
+        """
+        self.inbox_path.parent.mkdir(parents=True, exist_ok=True)
+        line = json.dumps(event, ensure_ascii=False) + "\n"
+        # O_APPEND 保证并发写入时各行不交错
+        with open(self.inbox_path, "a", encoding="utf-8") as f:
+            f.write(line)
+
+    @classmethod
+    def write_event_to(cls, inbox_path: Path, event: Dict[str, Any]) -> None:
+        """静态方法：写入事件到指定路径"""
+        inbox_path.parent.mkdir(parents=True, exist_ok=True)
+        line = json.dumps(event, ensure_ascii=False) + "\n"
+        with open(inbox_path, "a", encoding="utf-8") as f:
+            f.write(line)