diff --git a/code/kernels.py b/code/kernels.py
new file mode 100644
index 0000000..389f575
--- /dev/null
+++ b/code/kernels.py
@@ -0,0 +1,63 @@
+import csv
+import json
+from collections.abc import Generator
+from datetime import datetime
+from pathlib import Path
+from typing import Any, cast
+
+
+def package_kernel_csv(input_dir: Path, output_dir: Path) -> None:
+    output_file = output_dir / "kernels.csv"
+    with output_file.open("w") as fw:
+        writer = csv.writer(fw)
+        writer.writerow(["date", "kernel", "downloads"])
+
+        for j in input_dir.glob("*.json"):
+            with open(j) as fr:
+                date = j.stem
+                data: dict[str, Any] = {}
+                try:
+                    data = cast(dict[str, object], json.load(fr))
+                except json.JSONDecodeError:
+                    print(f"WARN: Could not decode JSON data for file {j}")
+                    continue
+
+                if "XuKernel" not in data or not isinstance(data["XuKernel"], dict):
+                    print(
+                        f"WARN: No correct json structure containing 'XuKernel' field in file {j}"
+                    )
+                    continue
+
+                for entry in data["XuKernel"]:
+                    p_name = cast(str, entry)
+                    p_count = cast(int, data["XuKernel"][entry])
+                    p_date = date
+                    writer.writerow([p_date, p_name, p_count])
+                    # print(output_file, p_date, p_name, p_count)
+
+
+def ensure_dirs(input_dir: Path, output_dir: Path):
+    if not input_dir.is_dir():
+        raise ValueError
+    output_dir.mkdir(exist_ok=True, parents=True)
+
+
+def main(input: str, output: str) -> None:
+    input_dir = Path(input)
+    output_dir = Path(output)
+    ensure_dirs(input_dir, output_dir)
+    # json_to_daily_pkg(Path(input) / "daily", Path(output) / "daily", force=True)
+    # json_to_unique_csv(Path(input) / "daily", Path(output), force=True)
+
+    package_kernel_csv(input_dir, output_dir)
+
+
+if __name__ == "__main__":
+    import sys
+
+    if not len(sys.argv) == 3:
+        print("Please provide exactly one input directory and one output directory.")
+        sys.exit(1)
+    inp = sys.argv[1]
+    out = sys.argv[2]
+    main(inp, out)