diff --git a/oyster/scripts/__init__.py b/oyster/scripts/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/oyster/scripts/signal.py b/oyster/scripts/signal.py
new file mode 100644
index 0000000..7e0b1af
--- /dev/null
+++ b/oyster/scripts/signal.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+import argparse
+
+from oyster.core import kernel
+
+def main():
+    parser = argparse.ArgumentParser(
+        description='do a task for all documents in a doc_class',
+    )
+
+    parser.add_argument('function', type=str, help='path to function to apply')
+    parser.add_argument('doc_class', type=str,
+                        help='doc_class to apply function to')
+
+    args = parser.parse_args()
+
+    docs = kernel.db.tracked.find({'doc_class':args.doc_class})
+    print '%s docs in %s' % (docs.count(), args.doc_class)
+
+    path, func = args.function.rsplit('.',1)
+    mod = __import__(path, fromlist=[func])
+    func = getattr(mod, func)
+
+    for doc in docs:
+        func(doc, kernel.get_last_version(doc))
+        # optionally save doc?
+
+if __name__ == '__main__':
+    main()