diff --git a/compiler/main.ts b/compiler/main.ts
new file mode 100644
index 0000000..c87de99
--- /dev/null
+++ b/compiler/main.ts
@@ -0,0 +1,22 @@
+type Pack = {
+    rootMod: Mod;
+};
+
+type Mod = null;
+
+interface PackEmitter {
+    emit(pack: Pack): void;
+}
+
+class PackCompiler {
+    public constructor(
+        private entryFilePath: string,
+        private emitter: PackEmitter,
+    ) {}
+
+    public compile() {
+    }
+}
+
+class ModResolver {
+}