diff --git a/src/daemon/spawner.py b/src/daemon/spawner.py
index 3b8e6cb..7876435 100644
--- a/src/daemon/spawner.py
+++ b/src/daemon/spawner.py
@@ -15,7 +15,7 @@ from datetime import datetime
 from pathlib import Path
 from typing import Any, Dict, List, Optional
 
-from src.blackboard.db import get_connection
+from src.blackboard.db import get_connection, init_db
 
 logger = logging.getLogger("moziplus-v2.spawner")
 
@@ -163,7 +163,6 @@ class AgentBusyError(Exception):
 
     #07: reason 字段区分具体原因,便于 dispatcher 层区分处理。
     """
-
     def __init__(self, agent_id: str, reason: str = "busy", detail: Optional[dict] = None):
         self.agent_id = agent_id
         self.reason = reason   # counter_blocked / session_locked / session_running / session_compacting / session_stuck
@@ -300,7 +299,7 @@ class AgentSpawner:
             project_id, agent_id)
 
     def _build_minimal_fallback(self, task_id, title, description, must_haves,
-                                project_id, agent_id):
+                             project_id, agent_id):
         """最小 fallback:只有任务上下文 + API 指令"""
         task_section = f"""## 任务
 {title}
@@ -312,7 +311,7 @@ class AgentSpawner:
         return task_section + "\n\n---\n\n" + api_section
 
     def _build_api_section(self, project_id: str, task_id: str,
-                           agent_id: str) -> str:
+                            agent_id: str) -> str:
         """构建 API 回写操作指令(BootstrapBuilder 模式下补充)"""
         # mail 任务直接 done,不走 review
         success_status = '"done"' if project_id == "_mail" else '"review"'
@@ -338,8 +337,8 @@ curl -X POST http://{self.api_host}:{self.api_port}/api/projects/{project_id}/ta
 """
 
     def _build_discussion_prompt(self, task_id: str, title: str,
-                                 description: str, must_haves: str,
-                                 project_id: str, agent_id: str) -> str:
+                                  description: str, must_haves: str,
+                                  project_id: str, agent_id: str) -> str:
         """构建讨论类 spawn prompt(§3.3 框架 + Boids)"""
         goal_snapshot = description or title
         constraints = must_haves or "(无特殊约束)"
@@ -380,8 +379,9 @@ curl -X POST http://{self.api_host}:{self.api_port}/api/projects/{project_id}/ta
             return router.agent_profiles.get(agent_id)
         return None
 
+
     def _build_mail_prompt(self, task_id: str, title: str, description: str,
-                           must_haves: str, agent_id: str) -> str:
+                            must_haves: str, agent_id: str) -> str:
         """构建 Mail 专用精简模板"""
         # 解析 must_haves 获取 from 和 performative
         from_agent = agent_id
@@ -575,7 +575,7 @@ curl -X POST http://{self.api_host}:{self.api_port}/api/projects/{project_id}/ta
                 stderr=asyncio.subprocess.PIPE,
             )
             self._register_session(session_id, agent_id, task_id, proc.pid,
-                                   broadcast_task_ids=broadcast_task_ids)
+                                     broadcast_task_ids=broadcast_task_ids)
             logger.info("Spawned agent %s (session=%s, pid=%d)",
                         agent_id, session_id, proc.pid)
 
@@ -881,6 +881,9 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
         except Exception:
             pass
 
+        stderr_text = b"".join(stderr_chunks).decode("utf-8", errors="replace")
+
+        # 检查 session 状态
         state = self._check_session_state(agent_id)
 
         # B1: 假死 - 先复活,连续假死 ≥2 次再 failed
@@ -1216,7 +1219,7 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
         实测 50KB 在长对话中不够（compact 记录被推出窗口导致漏检）。
         正常扫描量不变：从尾部往前扫，遇到超过 15min 的 timestamp 即 break。
         """
-        if not session_file or not Path(session_file).exists():
+        if not session_file or not pathlib.Path(session_file).exists():
             return False
         try:
             from datetime import datetime, timezone
@@ -1425,7 +1428,7 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
         return defaults
 
     def _update_retry_counts(self, db_path: Optional[Path],
-                             task_id: Optional[str], counts: dict):
+                              task_id: Optional[str], counts: dict):
         """将 retry counts 写回最新 task_attempt 的 metadata"""
         if not db_path or not task_id:
             return
@@ -1485,8 +1488,8 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
                         from src.blackboard.operations import Blackboard
                         bb = Blackboard(db_path)
                         cid = bb.add_comment(task_id, "daemon",
-                                             f"@pangtong-fujunshi 任务执行失败: {reason}，请评估是否需要介入",
-                                             comment_type="system")
+                            f"@pangtong-fujunshi 任务执行失败: {reason}，请评估是否需要介入",
+                            comment_type="system")
                         bb.record_mentions(cid, task_id, ["pangtong-fujunshi"])
                         logger.info("Task %s: failure notified pangtong via comment+mention (reason=%s)", task_id, reason)
                 except Exception as e: