diff --git a/backend/app/api/skills.py b/backend/app/api/skills.py
index d77d6efb8..4845e8487 100644
--- a/backend/app/api/skills.py
+++ b/backend/app/api/skills.py
@@ -55,9 +55,6 @@
 )
 from app.security.tenant import ensure_tenant
 from app.skills import SkillDistiller, SkillEditor
-
-_CHANNEL_LABELS = {"wechat": "微信", "wecom": "企业微信", "feishu": "飞书", "dingtalk": "钉钉"}
-
 from app.skills.skill_schema import (
     SkillCard,
     SkillCreateRequest,
@@ -81,6 +78,8 @@
     validate_sop_nesting,
 )
 
+_CHANNEL_LABELS = {"wechat": "微信", "wecom": "企业微信", "feishu": "飞书", "dingtalk": "钉钉"}
+
 router = APIRouter(
     prefix="/api/enterprise/skills",
     tags=["enterprise:skills"],
diff --git a/backend/app/core/agent_loop.py b/backend/app/core/agent_loop.py
index 6c230aebf..3c6b915ef 100644
--- a/backend/app/core/agent_loop.py
+++ b/backend/app/core/agent_loop.py
@@ -58,8 +58,6 @@
     resolve_model_config_for_runtime,
 )
 from app.llm.stage_protocol import stage_payload, unified_system_prompt
-
-logger = logging.getLogger(__name__)
 from app.memory.jobs import enqueue_memory_capture
 from app.memory.service import MemoryService
 from app.observability import EventLog
@@ -75,6 +73,8 @@
 )
 from app.tools.tool_schema import ToolResult
 
+logger = logging.getLogger(__name__)
+
 STREAM_CHUNK_INTERVAL_SECONDS = 0.045
 MAX_TOOL_ACTIONS_PER_TURN = 32
 MAX_TOOL_ACTIONS_PER_TURN_LIMIT = 100
diff --git a/backend/tests/test_channel_routing.py b/backend/tests/test_channel_routing.py
index f5e05d669..439f54199 100644
--- a/backend/tests/test_channel_routing.py
+++ b/backend/tests/test_channel_routing.py
@@ -622,7 +622,7 @@ def test_delete_agent_cleans_channel_mounts_and_repoints_default() -> None:
 
     client = _make_agents_client(engine)
     deleted = client.delete(
-        f"/api/enterprise/agents/agent_cw?tenant_id=tenant_demo",
+        "/api/enterprise/agents/agent_cw?tenant_id=tenant_demo",
         headers=_auth(users["owner"]),
     )
     assert deleted.status_code == 200
@@ -671,7 +671,7 @@ def test_delete_agent_last_mount_keeps_binding_agent() -> None:
 
     client = _make_agents_client(engine)
     deleted = client.delete(
-        f"/api/enterprise/agents/agent_cw?tenant_id=tenant_demo",
+        "/api/enterprise/agents/agent_cw?tenant_id=tenant_demo",
         headers=_auth(users["owner"]),
     )
     assert deleted.status_code == 200