diff --git a/robustness_check/src/robustness_check/cli.py b/robustness_check/src/robustness_check/cli.py
new file mode 100644
index 0000000..5362f8d
--- /dev/null
+++ b/robustness_check/src/robustness_check/cli.py
@@ -0,0 +1,52 @@
+import argparse
+import json
+from pathlib import Path
+from robustness_check.core import check_robustness
+
+
+def main() -> None:
+    """Command-line entry point for Gate v0 Robustness Evaluation."""
+    parser = argparse.ArgumentParser(
+        description="Analyse der Gate-v0-Robustheit aus Frozen-Run-Daten."
+    )
+    parser.add_argument(
+        "--input",
+        required=True,
+        help="Pfad zur Eingabedatei mit Run-Daten im JSON-Format."
+    )
+    parser.add_argument(
+        "--output",
+        required=True,
+        help="Pfad zur Ausgabedatei für die Robustheitsergebnisse."
+    )
+    args = parser.parse_args()
+
+    input_path = Path(args.input)
+    output_path = Path(args.output)
+
+    if not input_path.exists():
+        parser.error(f"Eingabedatei nicht gefunden: {input_path}")
+
+    try:
+        with input_path.open("r", encoding="utf-8") as f:
+            runs_data = json.load(f)
+            if not isinstance(runs_data, list):
+                raise ValueError("Eingabedatei muss eine Liste von Run-Objekten enthalten.")
+    except (json.JSONDecodeError, ValueError) as e:
+        parser.error(f"Ungültiges Eingabeformat: {e}")
+
+    result = check_robustness(runs_data)
+
+    # Prepare output directory
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+
+    with output_path.open("w", encoding="utf-8") as f:
+        json.dump({
+            "k_value": result.k_value,
+            "flip_flops": result.flip_flops,
+            "average_decision": result.average_decision,
+        }, f, indent=2)
+
+
+if __name__ == "__main__":
+    main()