diff --git a/web/__init__.py b/web/__init__.py
index 81696b9..617ddcb 100644
--- a/web/__init__.py
+++ b/web/__init__.py
@@ -23,7 +23,9 @@ def register_blueprints(app):
     from .devices_api import bp as devices_bp
     from .apks_api import bp as apks_bp
     from .tailscale_api import bp as tailscale_bp
+    from . import agent_api as _agent_mod
     from .agent_api import bp as agent_bp
+    _agent_mod.set_app(app)
     for bp in (auth_bp, monitor_bp, tasks_bp, admin_bp, tools_bp,
                devices_bp, apks_bp, tailscale_bp, agent_bp):
         app.register_blueprint(bp)
diff --git a/web/agent_api.py b/web/agent_api.py
index ede6239..2dcb2a1 100644
--- a/web/agent_api.py
+++ b/web/agent_api.py
@@ -43,6 +43,12 @@ _run = {"id": None, "state": "idle", "prompt": "", "serial": "",
 _queues = {}            # run_id -> queue.Queue（SSE 消费者读取）
 _stop_events = {}       # run_id -> threading.Event（用户中断）
 _lock = threading.Lock()
+_flask_app = None       # web_server 注册时注入（后台线程 db 操作需 app context）
+
+
+def set_app(app):
+    global _flask_app
+    _flask_app = app
 
 
 def _meta_get(key):
@@ -90,10 +96,13 @@ def _bigrams(text):
 def _find_experiences(prompt, limit=2, threshold=0.10):
     """按 bigram 重叠检索相似历史经验（prompt 与任务描述的字符相似度）。"""
     try:
-        _ensure_exp_table()
-        rows = db.session.execute(db.text(
-            "SELECT task_prompt, recipe, hits FROM agent_experience "
-            "WHERE recipe != '' ORDER BY hits DESC, id DESC LIMIT 50")).fetchall()
+        if _flask_app is None:
+            return ""
+        with _flask_app.app_context():
+            _ensure_exp_table()
+            rows = db.session.execute(db.text(
+                "SELECT task_prompt, recipe, hits FROM agent_experience "
+                "WHERE recipe != '' ORDER BY hits DESC, id DESC LIMIT 50")).fetchall()
     except Exception:
         return ""
     if not rows:
@@ -141,16 +150,20 @@ def _distill_experience(cfg, prompt, tool_seq):
 
 
 def _save_experience(prompt, recipe, tool_seq):
+    """保存经验（后台线程调用，包 app context）。"""
     try:
-        _ensure_exp_table()
-        from datetime import datetime
-        db.session.execute(db.text(
-            "INSERT INTO agent_experience(task_prompt, recipe, tool_seq, hits, created_at) "
-            "VALUES(:p, :r, :t, 0, :c)"),
-            {"p": prompt[:500], "r": recipe, "t": tool_seq[:1000],
-             "c": datetime.now().strftime("%Y-%m-%d %H:%M")})
-        db.session.commit()
-        _log.info("经验已保存（配方 %d 字符）", len(recipe))
+        if _flask_app is None:
+            return
+        with _flask_app.app_context():
+            _ensure_exp_table()
+            from datetime import datetime
+            db.session.execute(db.text(
+                "INSERT INTO agent_experience(task_prompt, recipe, tool_seq, hits, created_at) "
+                "VALUES(:p, :r, :t, 0, :c)"),
+                {"p": prompt[:500], "r": recipe, "t": tool_seq[:1000],
+                 "c": datetime.now().strftime("%Y-%m-%d %H:%M")})
+            db.session.commit()
+            _log.info("经验已保存（配方 %d 字符）", len(recipe))
     except Exception as e:
         _log.warning(f"经验保存失败: {e}")