diff --git a/karaokatalog/deduplicate/prune.py b/karaokatalog/deduplicate/prune.py
new file mode 100644
index 0000000..4103443
--- /dev/null
+++ b/karaokatalog/deduplicate/prune.py
@@ -0,0 +1,12 @@
+from collections.abc import Sequence
+
+from karaokatalog.deduplicate.instructions.DeleteInstruction import DeleteInstruction
+from karaokatalog.Song import Song
+
+
+def prune(equivalent_songs: Sequence[Song]) -> Sequence[DeleteInstruction]:
+    """
+    Prune a sequence of equivalent songs, by returning a sequence of instructions
+    that delete all but one song in this sequence.
+    """
+    pass