diff --git a/src/main.py b/src/main.py
index e361589..e14aa36 100644
--- a/src/main.py
+++ b/src/main.py
@@ -134,6 +134,15 @@ async def lifespan(app: FastAPI):
         max_concurrent_sessions=daemon_config.get("max_concurrent_sessions", 3),
         default_cooldown_seconds=daemon_config.get("cooldown_seconds", 120),
     )
+    # BootstrapBuilder（L2 引擎注入层）
+    template_dir = DATA_ROOT.parent / "prompt_templates"
+    if not template_dir.exists():
+        template_dir = Path("prompt_templates")
+    bootstrap_builder = BootstrapBuilder(
+        template_dir=template_dir,
+        max_tokens=4096,
+    )
+
     spawner = AgentSpawner(
         dry_run=False,
         agent_timeout=daemon_config.get("agent_timeout", 630),
@@ -143,6 +152,7 @@ async def lifespan(app: FastAPI):
         api_host=api_host,
         api_port=api_port,
         counter=counter,
+        bootstrap_builder=bootstrap_builder,
     )
 
     # 构建 Agent 能力画像（v2.6.1 路由）