diff --git a/.gitignore b/.gitignore
index f193069..3c815ab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-tsp-output/*
-node_modules/*
-dist/*
-src-tsp/modules/*
\ No newline at end of file
+tsp-output/
+node_modules/
+dist/
+src-tsp/modules/
diff --git a/fetchModuleSchemas.js b/fetchModuleSchemas.js
index 6f56858..02cbf22 100644
--- a/fetchModuleSchemas.js
+++ b/fetchModuleSchemas.js
@@ -41,5 +41,12 @@ for (const module of modules) {
 
 fs.writeFileSync(`${modulesDir}/index.tsp`, 
 moduleImports.map(m => `import "./${m}";`).join("\n") + `
-alias RepoModule = ${moduleModels.map(m => `${m}Module`).join(" | ")};`
-)
\ No newline at end of file
+import "@typespec/json-schema";
+
+using TypeSpec.JsonSchema;
+
+@oneOf
+union RepoModule {
+${moduleModels.map(m => `  ${m}Module`).join(",\n")}
+}`
+)