diff --git a/lib/README.md b/lib/README.md
new file mode 100644
index 000000000..e8fdcb9ae
--- /dev/null
+++ b/lib/README.md
@@ -0,0 +1,4 @@
+## Libraries structure
+
+* `/lib/composer-vendor/*` Libs managed by the composer.json file.
+* `/lib/*` Libs managed manually by us. Some have been forked, some patched. Might move to composer eventually.