diff --git a/packages/ts-simplify/bin/ts-simplify.ts b/packages/ts-simplify/bin/ts-simplify.ts
index e767682..c5cc864 100644
--- a/packages/ts-simplify/bin/ts-simplify.ts
+++ b/packages/ts-simplify/bin/ts-simplify.ts
@@ -1,5 +1,6 @@
 import { simplifyTypes } from "../src/simplify-types";
 
 declare const process: { argv: string[] };
-const [_, __, source, output] = process.argv;
-simplifyTypes({ source, output });
+const [_, __, sourceFile, outputFile] = process.argv;
+const outputText = simplifyTypes({ sourceFile });
+console.log(outputText);
diff --git a/packages/ts-simplify/package.json b/packages/ts-simplify/package.json
index d3dac42..a253e96 100644
--- a/packages/ts-simplify/package.json
+++ b/packages/ts-simplify/package.json
@@ -9,8 +9,12 @@
   "keywords": [],
   "author": "",
   "license": "MIT",
+  "dependencies": {
+    "debug": "^4.3.4",
+    "ts-morph": "^20.0.0"
+  },
   "devDependencies": {
-    "ts-morph": "^20.0.0",
+    "@types/debug": "^4.1.9",
     "ts-node": "^10.9.1",
     "typescript": "^5.2.2"
   }
diff --git a/packages/ts-simplify/src/simplify-types.ts b/packages/ts-simplify/src/simplify-types.ts
index 3c11b49..5614a62 100644
--- a/packages/ts-simplify/src/simplify-types.ts
+++ b/packages/ts-simplify/src/simplify-types.ts
@@ -1,24 +1,30 @@
+import debug from "debug";
 import { Project, TypeFormatFlags } from "ts-morph";
 
-const logger = {
-  info(...messages: any[]): void {
-    console.log(...messages);
-  },
-};
+namespace logger {
+  const base = debug("ts-simplify");
+  export const info = base.extend("info");
+  export const warn = base.extend("warn");
+  export const error = base.extend("error");
+}
 
-export function simplifyTypes({ source = "", output = "" }) {
+export function simplifyTypes(config: { sourceFile: string }) {
   const project = new Project({
     tsConfigFilePath: "tsconfig.json",
     skipAddingFilesFromTsConfig: true,
   });
-  const sourceFile = project.addSourceFileAtPath(source);
+  logger.info(`Loading source file at ${config.sourceFile}`);
+
+  const sourceFile = project.addSourceFileAtPath(config.sourceFile);
 
   const sourceTypes = sourceFile.getTypeAliases().filter((type) => type.isExported());
 
+  logger.info(`Source file exports ${sourceTypes.length} types: ${sourceTypes.map((t) => t.getName()).join(", ")}`);
+
   const simplifiedFile = project.createSourceFile(
     "./virtual/simplified.ts",
     unindent(`
-      import * as SOURCES from '../${source}';
+      import * as SOURCES from '../${config.sourceFile}';
 
       type SimplifyDeep<T> = T extends object
         ? T extends infer O
@@ -38,7 +44,7 @@ export function simplifyTypes({ source = "", output = "" }) {
   );
 
   const outputFile = project.createSourceFile(
-    output || "./virtual/output.ts",
+    "./virtual/output.ts",
     `
       // Generated by ts-simplify
     `,
@@ -59,12 +65,18 @@ export function simplifyTypes({ source = "", output = "" }) {
       type: expandedType,
     });
   }
-  console.log(simplifiedFile.getText({ includeJsDocComments: true }));
-  console.log(outputFile.getText({ includeJsDocComments: true }));
+
+  const outputText = unindent(`
+    // Generated by ts-simplify
+    // Original source: ${config.sourceFile}
+    ${outputFile.getText()}
+  `);
+
+  return outputText;
 }
 
 function unindent(str: string) {
   const lines = str.split("\n");
-  const indent = lines[0].match(/^\s*/)![0];
+  const indent = lines[1].match(/^\s*/)![0];
   return lines.map((line) => line.replace(indent, "")).join("\n");
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ca0f74b..3f69911 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -233,6 +233,12 @@ importers:
 
   packages/ts-simplify:
     devDependencies:
+      '@types/debug':
+        specifier: ^4.1.9
+        version: 4.1.9
+      debug:
+        specifier: ^4.3.4
+        version: 4.3.4(supports-color@8.1.1)
       ts-morph:
         specifier: ^20.0.0
         version: 20.0.0
@@ -1457,7 +1463,7 @@ packages:
     engines: {node: '>=14'}
     dependencies:
       '@open-draft/until': 1.0.3
-      '@types/debug': 4.1.7
+      '@types/debug': 4.1.9
       '@xmldom/xmldom': 0.7.5
       debug: 4.3.4(supports-color@8.1.1)
       headers-polyfill: 3.1.0
@@ -2238,8 +2244,8 @@ packages:
     resolution: {integrity: sha512-vt+kDhq/M2ayberEtJcIN/hxXy1Pk+59g2FV/ZQceeaTyCtCucjL2Q7FXlFjtWn4n15KCr1NE2lNNFhp0lEThw==}
     dev: true
 
-  /@types/debug@4.1.7:
-    resolution: {integrity: sha512-9AonUzyTjXXhEOa0DnqpzZi6VHlqKMswga9EXjpXnnqxwLtdvPPtlO8evrI5D9S6asFRCQ6v+wpiUKbw+vKqyg==}
+  /@types/debug@4.1.9:
+    resolution: {integrity: sha512-8Hz50m2eoS56ldRlepxSBa6PWEVCtzUo/92HgLc2qTMnotJNIm7xP+UZhyWoYsyOdd5dxZ+NZLb24rsKyFs2ow==}
     dependencies:
       '@types/ms': 0.7.31
     dev: true