diff --git a/api/request_diagnostics.py b/api/request_diagnostics.py
index 7c1b2536..2199567c 100644
--- a/api/request_diagnostics.py
+++ b/api/request_diagnostics.py
@@ -184,15 +184,16 @@ class RequestDiagnostics:
             self._current_stage_started = now
 
     def _emit_slow(self, prefix: str, record: dict) -> None:
-        payload = f"{prefix} {json.dumps(record, sort_keys=True)}"
+        payload = json.dumps(record, sort_keys=True)
+        log_msg = f"{prefix} %s"
         if self._print_fn is not None:
             try:
-                self._print_fn(payload)
+                self._print_fn(log_msg % payload)
             except Exception:
                 # print_fn is best-effort; never break a request thread.
                 pass
         else:
-            self.logger.warning("%s", payload)
+            self.logger.warning(log_msg, payload)
 
     def finish(self) -> None:
         record = None
diff --git a/api/routes.py b/api/routes.py
index 73f4a452..3df40cae 100644
--- a/api/routes.py
+++ b/api/routes.py
@@ -6278,7 +6278,7 @@ def _read_profile_model_config(
     try:
         from api.profiles import get_hermes_home_for_profile
 
-        _profile_name = str(getattr(session, "profile") or "")
+        _profile_name = str(session.profile or "")
         _profile_home = get_hermes_home_for_profile(_profile_name)
         _profile_cfg_path = os.path.join(str(_profile_home), "config.yaml")
         if not os.path.isfile(_profile_cfg_path):
@@ -13840,7 +13840,7 @@ def handle_post(handler, parsed) -> bool:
         if _draft_stages[-1][1] - _draft_t0 > 0.2:
             parts = " ".join(
                 f"{n}={((t - prev[1]) * 1000):.1f}ms"
-                for (n, t), prev in zip(_draft_stages[1:], _draft_stages[:-1])
+                for (n, t), prev in zip(_draft_stages[1:], _draft_stages[:-1], strict=True)
             )
             handler._safe_webui_print(
                 "[SLOW] /api/session/draft total=%.1fms stages: %s" % (