diff --git a/.headroom-templates/shell.mustache b/.headroom-templates/shell.mustache
new file mode 100644
index 0000000..e4f2fac
--- /dev/null
+++ b/.headroom-templates/shell.mustache
@@ -0,0 +1,16 @@
+# {{ project }}
+# Copyright (c) {{ year }} {{ author }}
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public
+# License along with this program.
+# If not, see http://www.gnu.org/licenses/.