diff --git a/backend/runtime_logs.py b/backend/runtime_logs.py
new file mode 100644
index 0000000..22641ad
--- /dev/null
+++ b/backend/runtime_logs.py
@@ -0,0 +1,17 @@
+from datetime import datetime
+from collections import deque
+
+MAX_LOGS = 500
+
+runtime_logs = deque(maxlen=MAX_LOGS)
+
+
+def add_log(message: str):
+    runtime_logs.appendleft({
+        'timestamp': datetime.utcnow().isoformat(),
+        'message': message,
+    })
+
+
+def get_logs(limit: int = 100):
+    return list(runtime_logs)[:limit]