diff --git a/sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/README b/sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/README
new file mode 100644
index 0000000000..ecfbc513fb
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/README
@@ -0,0 +1,2 @@
+If /etc/sshd_config changes make sure to apply the change to sys-auth/google-oslogin.
+Those files must be kept in sync.
diff --git a/sdk_container/src/third_party/coreos-overlay/net-misc/openssh/README b/sdk_container/src/third_party/coreos-overlay/net-misc/openssh/README
new file mode 100644
index 0000000000..abca7ba00a
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/net-misc/openssh/README
@@ -0,0 +1,2 @@
+If sshd.pam_include.2 changes make sure to apply the change to sys-auth/google-oslogin
+Those files must be kept in sync.
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/README b/sdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/README
new file mode 100644
index 0000000000..b44f857759
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/README
@@ -0,0 +1,2 @@
+If nsswitch.conf changes make sure to apply the change to sys-auth/google-oslogin
+Those files must be kept in sync.