fix: ignore internal API request snapshots in turn assembly

hooks/langfuse_hook.py

@@ -639,6 +639,9 @@ def get_user_or_assistant_role_from_row(row: Dict[str, Any]) -> Optional[str]:
     # Claude Code transcript row format is internal. Prefer top-level row.type
     # when it marks a chat row, then fall back to nested message.role.
     row_type = row.get("type")
+    # Request snapshots are internal records, not conversation messages.
+    if row_type == "api-request-blob":
+        return None
     if row_type in ("user", "assistant"):
         return row_type
 

tests/integration/test_state_lock_contention.py

@@ -111,7 +111,7 @@ def test_entry_of_another_session_survives_the_emit(
     def other_session_saves() -> None:
         with hook_module.FileLock(hook_module.LOCK_FILE):
             state = hook_module.load_hook_state()
-            state["other-session-key"] = {"offset": 42, "updated": "2026-09-10T00:00:00+00:00"}
+            state["other-session-key"] = {"offset": 42, "updated": _now_iso()}
             hook_module.save_hook_state(state)
 
     _during_emit(hook_module, monkeypatch, other_session_saves)

tests/unit/test_turn_assembly.py

@@ -1,5 +1,13 @@
 from __future__ import annotations
 
+import pytest
+
+
+@pytest.mark.parametrize("role", ["user", "assistant"])
+def test_api_request_snapshots_are_not_conversation_rows(hook_module, role):
+    row = {"type": "api-request-blob", "message": {"role": role}}
+    assert hook_module.get_user_or_assistant_role_from_row(row) is None
+
 
 def test_build_turns_merges_split_assistant_rows(
     hook_module,