diff --git a/package.json b/package.json
index 9221a30..2dcb623 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "type": "module",
   "types": "index.d.ts",
   "imports": {
-    "#app": "./src/app.ts"
+    "#index": "./src/index.ts"
   },
   "exports": {
     ".": "./index.js"
diff --git a/rollup.config.ts b/rollup.config.ts
index 7e75a2f..eb0437d 100644
--- a/rollup.config.ts
+++ b/rollup.config.ts
@@ -8,12 +8,11 @@ import typescript from '@rollup/plugin-typescript';
 const sourceFolder = 'src';
 
 const fileFormat = 'es';
-const entryFileName = 'app';
-const outputFileName = 'index';
+const fileName = 'index';
 
-const declarationFile = `${outputFileName}.d.ts`;
-const entryFile = `${entryFileName}.ts`;
-const outputFile = `${outputFileName}.js`;
+const declarationFile = `${fileName}.d.ts`;
+const entryFile = `${fileName}.ts`;
+const outputFile = `${fileName}.js`;
 
 export default defineConfig([
   {
diff --git a/specs/define-config.spec.ts b/specs/define-config.spec.ts
index 97b3dd9..270ba9a 100644
--- a/specs/define-config.spec.ts
+++ b/specs/define-config.spec.ts
@@ -2,24 +2,204 @@ import { describe, expectTypeOf, test as spec } from 'vitest';
 
 import type { UserConfig } from '@commitlint/types';
 
-import { defineConfig } from '#app';
+import { defineConfig } from '#index';
 
-describe('Commitlint Config', () => {
-  spec('empty config', async () => {
+describe('Commitlint Config', async () => {
+  spec('should return empty config', async () => {
     expectTypeOf(defineConfig({})).toEqualTypeOf<UserConfig>();
   });
 
-  spec('config', async () => {
+  spec('should return config', async () => {
     expectTypeOf(
       defineConfig({
         defaultIgnores: true,
-        extends: [],
-        formatter: 'string',
+        extends: [''],
+        formatter: '',
         helpUrl: '',
-        ignores: [],
-        parserPreset: '',
-        plugins: [],
-        prompt: {},
+        ignores: [() => true],
+        parserPreset: {
+          name: '',
+          parserOpts: '',
+          path: '',
+        },
+        plugins: [
+          {
+            rules: {},
+          },
+          '',
+        ],
+        prompt: {
+          messages: {
+            emptyWarning: '',
+            lowerLimitWarning: '',
+            max: '',
+            min: '',
+            skip: '',
+            upperLimitWarning: '',
+          },
+          settings: {
+            enableMultipleScopes: true,
+            scopeEnumSeparator: '',
+          },
+          questions: {
+            header: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            type: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            scope: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            subject: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            body: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            footer: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            isBreaking: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            breakingBody: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            breaking: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            isIssueAffected: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            issuesBody: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+            issues: {
+              description: '',
+              messages: {
+                customMessage: '',
+              },
+              enum: {
+                customProperty: {
+                  description: '',
+                  title: '',
+                  emoji: '',
+                },
+              },
+            },
+          },
+        },
         rules: {},
       }),
     ).toEqualTypeOf<UserConfig>();
diff --git a/src/app.ts b/src/index.ts
similarity index 100%
rename from src/app.ts
rename to src/index.ts