diff --git a/bin/pf b/bin/pf
new file mode 100755
index 0000000..cf53010
--- /dev/null
+++ b/bin/pf
@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+import json
+import yaml
+import subprocess
+
+jqexpression = sys.argv[1]
+
+jqprocess = subprocess.Popen(["jq", "-r", jqexpression], stdin=subprocess.PIPE, text=True)
+
+document = [d for d in yaml.safe_load_all(sys.stdin)][-1]
+
+json.dump(document, jqprocess.stdin)