diff --git a/site-modules/core/files/vim/snippets/snippets/gitcommit/co.snippet b/site-modules/core/files/vim/snippets/snippets/gitcommit/co.snippet
new file mode 100644
index 0000000..550125c
--- /dev/null
+++ b/site-modules/core/files/vim/snippets/snippets/gitcommit/co.snippet
@@ -0,0 +1,6 @@
+# name: Co-authored-by trailer
+# key: co
+# contributor: Ade Attwood <code@adeattwood.co.uk>
+# filetypes: gitcommit
+# --
+Co-authored-by: ${0}