diff --git a/metropolis/node/allocs/doc.go b/metropolis/node/allocs/doc.go
new file mode 100644
index 0000000..dcc6960
--- /dev/null
+++ b/metropolis/node/allocs/doc.go
@@ -0,0 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package allocs contains allocations of various types of identifiers used in a
+// node. By tracking these centrally, we can avoid collisions.
+package allocs