diff --git a/batch_runner.py b/batch_runner.py
index 347883a14d..53caf4a1c6 100644
--- a/batch_runner.py
+++ b/batch_runner.py
@@ -298,10 +298,7 @@ def _process_batch_worker(args: Tuple) -> Dict[str, Any]:
     output_dir = Path(output_dir)
     print(f"\n🔄 Batch {batch_num}: Starting ({len(batch_data)} prompts)")
     batch_output_file = output_dir / f"batch_{batch_num}.jsonl"
-    prompts_to_process = [
-        (idx, data) for idx, data in batch_data
-        if idx not in completed_prompts_set
-    ]
+    prompts_to_process = [(idx, data) for idx, data in batch_data if idx not in completed_prompts_set]
 
     if not prompts_to_process:
         print(f"✅ Batch {batch_num}: Already completed (skipping)")
@@ -497,12 +494,7 @@ class BatchRunner:
         return _chunk(list(enumerate(self.dataset)), self.batch_size)
 
     def _empty_checkpoint(self) -> Dict[str, Any]:
-        return {
-            "run_name": self.run_name,
-            "completed_prompts": [],
-            "batch_stats": {},
-            "last_updated": None
-        }
+        return {"run_name": self.run_name, "completed_prompts": [], "batch_stats": {}, "last_updated": None}
 
     def _load_checkpoint(self) -> Dict[str, Any]:
         """Checkpoint data (completed prompt indices), or an empty one if missing/unreadable."""
diff --git a/hermes_constants.py b/hermes_constants.py
index d8eff1a11b..8855141c41 100644
--- a/hermes_constants.py
+++ b/hermes_constants.py
@@ -1039,9 +1039,7 @@ def resolve_reasoning_config(cfg: dict | None, model: str = "") -> dict | None:
     result = parse_reasoning_effort(effort)
     if effort and str(effort).strip() and result is None:
         import logging
-        logging.getLogger(__name__).warning(
-            "Unknown reasoning_effort '%s', using default (medium)", effort
-        )
+        logging.getLogger(__name__).warning("Unknown reasoning_effort '%s', using default (medium)", effort)
     return result
 
 
@@ -1178,9 +1176,7 @@ def apply_ipv4_preference(force: bool = False) -> None:
     def _ipv4_getaddrinfo(host, port, family=0, type=0, proto=0, flags=0):
         if family == 0:  # AF_UNSPEC — caller didn't request a specific family
             try:
-                return _original_getaddrinfo(
-                    host, port, socket.AF_INET, type, proto, flags
-                )
+                return _original_getaddrinfo(host, port, socket.AF_INET, type, proto, flags)
             except socket.gaierror:  # no A record — pure-IPv6 host
                 return _original_getaddrinfo(host, port, family, type, proto, flags)
         return _original_getaddrinfo(host, port, family, type, proto, flags)
diff --git a/hermes_startup_watchdog.py b/hermes_startup_watchdog.py
index 9985689909..70acc45ce7 100644
--- a/hermes_startup_watchdog.py
+++ b/hermes_startup_watchdog.py
@@ -434,11 +434,7 @@ class StartupWatchdogHandle:
             return
 
     def _start(self) -> bool:
-        thread = threading.Thread(
-            target=self._run,
-            daemon=True,
-            name="gateway-startup-watchdog",
-        )
+        thread = threading.Thread(target=self._run, daemon=True, name="gateway-startup-watchdog")
         try:
             thread.start()
         except Exception: