diff --git a/apps/charging-engine/src/lib.rs b/apps/charging-engine/src/lib.rs
new file mode 100644
index 0000000..c332a5a
--- /dev/null
+++ b/apps/charging-engine/src/lib.rs
@@ -0,0 +1,6 @@
+pub mod charging;
+pub mod errors;
+pub mod handlers;
+pub mod routes;
+pub mod models;
+pub mod monitoring;