feat(langfuse): 목록 한 줄 = 채팅(질문/답/토큰), 트리 = OpenCode 도구 호출(SAP 조회·위키 read·grep) 순서대로

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

5_django_backend/tests/test_langfuse.py

@@ -78,7 +78,10 @@ async def test_finalize_sends_user_trace(lf_server, django_user_model, monkeypat
     from common.opencode_service import opencode_service
 
     async def _msgs(_sid):
-        return [{"info": {"role": "assistant", "tokens": {"input": 3, "output": 4, "reasoning": 1}, "time": {"created": 1000, "completed": 1500}}, "parts": [{"type": "text", "text": "답"}]}]
+        tool = {"type": "tool", "tool": "sap-icf_get_program_source", "state": {"status": "completed", "input": {"program_name": "ZTEST"}, "output": "REPORT ztest.", "title": "ZTEST", "time": {"start": 1100, "end": 1300}}}
+        bad = {"type": "tool", "tool": "read", "state": {"status": "error", "input": {"filePath": "x"}, "error": "no such file", "time": {"start": 1300, "end": 1310}}}
+        return [{"info": {"role": "assistant"}, "parts": [tool, bad]},
+                {"info": {"role": "assistant", "tokens": {"input": 3, "output": 4, "reasoning": 1}, "time": {"created": 1000, "completed": 1500}}, "parts": [{"type": "text", "text": "답"}]}]
 
     async def _sess(_sid):
         return {"title": "MARA 조회"}
@@ -92,10 +95,15 @@ async def test_finalize_sends_user_trace(lf_server, django_user_model, monkeypat
         await asyncio.gather(*list(langfuse._pending))
     assert len(lf_server) == 1
     spans = lf_server[0]["body"]["resourceSpans"][0]["scopeSpans"][0]["spans"]
-    t, g = _attrs(spans[0]), _attrs(spans[1])
+    assert [sp["name"] for sp in spans] == ["chat", "sap-icf_get_program_source", "read"]
+    t = _attrs(spans[0])
     assert t["langfuse.user.id"] == "u@x.com" and t["langfuse.session.id"] == "ses_1"
     assert t["langfuse.trace.input"] == "질문" and t["langfuse.trace.output"] == "답"
-    assert spans[1]["parentSpanId"] == spans[0]["spanId"]
-    assert json.loads(g["langfuse.observation.usage_details"]) == {"input": 3, "output": 5, "total": 8}
-    assert g["langfuse.observation.level"] == "DEFAULT" and spans[1]["status"]["code"] == 1
+    assert t["langfuse.observation.type"] == "generation"  # 루트가 곧 답변 — 토큰은 여기
+    assert json.loads(t["langfuse.observation.usage_details"]) == {"input": 3, "output": 5, "total": 8}
+    a1, a2 = _attrs(spans[1]), _attrs(spans[2])
+    assert spans[1]["parentSpanId"] == spans[0]["spanId"] and a1["langfuse.observation.type"] == "tool"
+    assert json.loads(a1["langfuse.observation.input"]) == {"program_name": "ZTEST"} and a1["langfuse.observation.output"] == "REPORT ztest."
+    assert spans[1]["startTimeUnixNano"] == "1100000000" and spans[1]["endTimeUnixNano"] == "1300000000"
+    assert spans[2]["status"] == {"code": 2, "message": "no such file"} and a2["langfuse.observation.level"] == "ERROR"
     assert stream_mod is not None