diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..26f7dd2
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,6 @@
+.tag                    export-subst
+.gitignore              export-ignore
+.gitattributes          export-ignore
+.commit-template        export-ignore
+tests                   export-ignore
+tools                   export-ignore
diff --git a/.tag b/.tag
new file mode 100644
index 0000000..6828f88
--- /dev/null
+++ b/.tag
@@ -0,0 +1 @@
+$Format:%H$