diff --git a/artifact_unit_tests/src/trace_agg.py b/artifact_unit_tests/src/trace_agg.py
new file mode 100644
index 0000000..4910da1
--- /dev/null
+++ b/artifact_unit_tests/src/trace_agg.py
@@ -0,0 +1,27 @@
+from typing import List, Dict
+
+def aggregate_traces(events: List[dict]) -> Dict[str, int]:
+    """Aggregiert Trace-Events nach Typ. Filtert nur 'clocksource'-Events
+    und bildet die Gesamtsumme ihrer Werte pro Event-Typ.
+
+    Args:
+        events: Liste von Event-Dictionaries mit Schlüsseln
+                'timestamp', 'event_type', 'value'.
+
+    Returns:
+        dict[str, int]: Mapping von Event-Typ zu Summenwert.
+    """
+    result: Dict[str, int] = {}
+    for ev in events:
+        # Nur clocksource-ähnliche Events berücksichtigen
+        if not isinstance(ev, dict):
+            continue
+        evt_type = ev.get('event_type')
+        if evt_type != 'clocksource':
+            continue
+        try:
+            value = int(ev.get('value', 0))
+        except (TypeError, ValueError):
+            value = 0
+        result[evt_type] = result.get(evt_type, 0) + value
+    return result
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