Create cli.py

cli.py

@@ -0,0 +1,34 @@
+import json
+import sys
+from pathlib import Path
+
+from scorer import score
+
+
+def main():
+    if len(sys.argv) != 3:
+        print("Usage: python cli.py <reference.csv> <predictions.csv>", file=sys.stderr)
+        sys.exit(1)
+
+    reference_path = Path(sys.argv[1])
+    prediction_path = Path(sys.argv[2])
+
+    if not reference_path.exists():
+        print(f"Reference file not found: {reference_path}", file=sys.stderr)
+        sys.exit(1)
+
+    if not prediction_path.exists():
+        print(f"Prediction file not found: {prediction_path}", file=sys.stderr)
+        sys.exit(1)
+
+    try:
+        results = score(reference_path, prediction_path)
+    except Exception as e:
+        print(f"Scoring error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+    print(json.dumps(results, indent=2))
+
+
+if __name__ == "__main__":
+    main()