diff --git a/queue_separation/src/queue_separation/cli.py b/queue_separation/src/queue_separation/cli.py
new file mode 100644
index 0000000..d807aa0
--- /dev/null
+++ b/queue_separation/src/queue_separation/cli.py
@@ -0,0 +1,82 @@
+import argparse
+import json
+import sys
+from pathlib import Path
+from typing import Any, Dict, List
+
+from queue_separation.main import simulate_queue_separation
+
+
+def _load_json_file(path: Path) -> Any:
+    if not path.exists() or not path.is_file():
+        raise FileNotFoundError(f"Eingabedatei nicht gefunden: {path}")
+    with path.open("r", encoding="utf-8") as f:
+        try:
+            return json.load(f)
+        except json.JSONDecodeError as e:
+            raise ValueError(f"Ungültiges JSON in Datei {path}: {e}") from e
+
+
+def _validate_jobs(jobs: Any) -> List[Dict[str, Any]]:
+    if not isinstance(jobs, list):
+        raise TypeError("Job-Daten müssen eine Liste sein.")
+    for job in jobs:
+        if not isinstance(job, dict):
+            raise TypeError("Jeder Job muss ein Dictionary sein.")
+    return jobs
+
+
+def _split_jobs(jobs: List[Dict[str, Any]]) -> tuple[List[Dict[str, Any]], List[Dict[str, Any]]]:
+    hotspot_queue = [j for j in jobs if j.get("type") == "hotspot"]
+    main_queue = [j for j in jobs if j.get("type") != "hotspot"]
+    return hotspot_queue, main_queue
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        description="Führt eine Simulation der Queue-Entkopplung durch und erzeugt Performance-Metriken."
+    )
+    parser.add_argument(
+        "--input",
+        required=True,
+        help="Pfad zur JSON-Datei mit Job-Definitionen."
+    )
+    parser.add_argument(
+        "--output",
+        required=False,
+        default="output/performance_metrics.json",
+        help="Pfad für die Resultate der Performance-Metriken."
+    )
+
+    args = parser.parse_args()
+
+    input_path = Path(args.input)
+    output_path = Path(args.output)
+
+    try:
+        raw_jobs = _load_json_file(input_path)
+        jobs = _validate_jobs(raw_jobs)
+        hotspot_queue, main_queue = _split_jobs(jobs)
+
+        metrics = simulate_queue_separation(
+            jobs=jobs,
+            hotspot_queue=hotspot_queue,
+            main_queue=main_queue,
+        )
+
+        if not isinstance(metrics, dict):
+            raise ValueError("simulate_queue_separation muss ein Dictionary zurückgeben.")
+
+        output_path.parent.mkdir(parents=True, exist_ok=True)
+        with output_path.open("w", encoding="utf-8") as f:
+            json.dump(metrics, f, indent=2)
+
+        print(f"Simulation abgeschlossen. Ergebnisse gespeichert unter: {output_path}")
+
+    except Exception as e:
+        print(f"Fehler: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()