diff --git a/artifact1/src/artifact1/cli.py b/artifact1/src/artifact1/cli.py
new file mode 100644
index 0000000..303201a
--- /dev/null
+++ b/artifact1/src/artifact1/cli.py
@@ -0,0 +1,100 @@
+import argparse
+import json
+import logging
+from pathlib import Path
+from typing import Any, Dict
+
+from artifact1.core import analyze_metrics
+
+
+def _setup_logger() -> None:
+    logging.basicConfig(
+        level=logging.INFO,
+        format="%(asctime)s [%(levelname)s] %(message)s",
+    )
+
+
+def _validate_input_data(data: Any) -> Dict[str, Any]:
+    if not isinstance(data, dict):
+        raise ValueError("Input JSON must contain an object at root level.")
+
+    required_fields = [
+        "max_only_alerts",
+        "outlier_frequency",
+        "expires_at_dist_hours",
+        "retry_total_overhead",
+    ]
+
+    for field in required_fields:
+        if field not in data:
+            raise ValueError(f"Missing required field '{field}' in input data.")
+
+    if not isinstance(data["max_only_alerts"], int):
+        raise TypeError("'max_only_alerts' must be an integer.")
+
+    for float_field in [
+        "outlier_frequency",
+        "expires_at_dist_hours",
+        "retry_total_overhead",
+    ]:
+        if not isinstance(data[float_field], (int, float)):
+            raise TypeError(f"'{float_field}' must be a number (float or int).")
+
+    return data
+
+
+def main() -> None:
+    _setup_logger()
+
+    parser = argparse.ArgumentParser(
+        description="Resonanzband Performance Analyse CLI"
+    )
+    parser.add_argument(
+        "--input",
+        required=True,
+        help="Pfad zur JSON-Eingabedatei mit Performance-Daten.",
+        type=str,
+    )
+    parser.add_argument(
+        "--output",
+        required=True,
+        help="Pfad zur JSON-Ausgabedatei mit Analyseergebnissen.",
+        type=str,
+    )
+
+    args = parser.parse_args()
+
+    input_path = Path(args.input)
+    output_path = Path(args.output)
+
+    if not input_path.exists():
+        logging.error(f"Input file not found: {input_path}")
+        raise FileNotFoundError(f"Input file not found: {input_path}")
+
+    logging.info(f"Loading performance data from {input_path}...")
+
+    with input_path.open("r", encoding="utf-8") as f:
+        try:
+            data = json.load(f)
+        except json.JSONDecodeError as e:
+            logging.error(f"Invalid JSON structure: {e}")
+            raise
+
+    validated_data = _validate_input_data(data)
+
+    logging.info("Running performance analysis...")
+    results = analyze_metrics(validated_data)
+
+    assert isinstance(results, dict), "analyze_metrics must return a dict"
+
+    logging.info(f"Writing analysis results to {output_path}...")
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+
+    with output_path.open("w", encoding="utf-8") as f:
+        json.dump(results, f, indent=2, ensure_ascii=False)
+
+    logging.info("Analysis complete. Results saved successfully.")
+
+
+if __name__ == "__main__":
+    main()