diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..c1a6f66
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,4 @@
+{
+  "singleQuote": true,
+  "trailingComma": "es5"
+}
diff --git a/package.json b/package.json
index 3becb42..9cfe4d1 100644
--- a/package.json
+++ b/package.json
@@ -25,20 +25,21 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "tsc -p tsconfig.build.json",
-    "test": "jest --coverage --verbose",
+    "test": "jest --coverage --verbose --testPathIgnorePatterns=e2e",
     "test:fixtures": "jest --testPathPattern=integration",
-    "test:watch": "jest --watch",
+    "test:e2e": "npm run build && jest --testPathPattern=e2e",
+    "test:watch": "jest --watch --testPathIgnorePatterns=e2e",
     "lint": "eslint '{src,test}/**/*.ts'",
     "lint:fix": "eslint '{src,test}/**/*.ts' --fix"
   },
   "dependencies": {
-    "jscodeshift": "^17.3.0",
-    "commander": "^14.0.2",
-    "inquirer": "^8.2.5",
     "chalk": "^4.1.2",
-    "ora": "^5.4.1",
+    "commander": "^14.0.2",
     "glob": "^10.0.0",
+    "inquirer": "^8.2.5",
     "is-git-clean": "^1.1.0",
+    "jscodeshift": "^17.3.0",
+    "ora": "^5.4.1",
     "typescript": "~5.2.2"
   },
   "devDependencies": {
@@ -48,9 +49,9 @@
     "@semantic-release/changelog": "^6.0.3",
     "@semantic-release/exec": "^6.0.3",
     "@semantic-release/git": "^10.0.1",
-    "@types/jscodeshift": "^0.11.0",
     "@types/inquirer": "^9.0.0",
     "@types/jest": "^29.5.14",
+    "@types/jscodeshift": "^0.11.0",
     "@types/node": "^20.0.0",
     "@typescript-eslint/eslint-plugin": "^8.19.1",
     "@typescript-eslint/parser": "^8.19.1",
@@ -59,6 +60,7 @@
     "globals": "^15.14.0",
     "jest": "^29.7.0",
     "jest-junit": "^16.0.0",
+    "prettier": "^3.7.4",
     "rimraf": "^5.0.0",
     "semantic-release": "^24.2.0",
     "ts-jest": "^29.2.5",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f44681a..460733d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -82,6 +82,9 @@ devDependencies:
   jest-junit:
     specifier: ^16.0.0
     version: 16.0.0
+  prettier:
+    specifier: ^3.7.4
+    version: 3.7.4
   rimraf:
     specifier: ^5.0.0
     version: 5.0.10
@@ -4785,6 +4788,12 @@ packages:
     engines: {node: '>= 0.8.0'}
     dev: true
 
+  /prettier@3.7.4:
+    resolution: {integrity: sha512-v6UNi1+3hSlVvv8fSaoUbggEM5VErKmmpGA7Pl3HF8V6uKY7rvClBOJlH6yNwQtfTueNkGVpOv/mtWL9L4bgRA==}
+    engines: {node: '>=14'}
+    hasBin: true
+    dev: true
+
   /pretty-format@29.7.0:
     resolution: {integrity: sha512-Pdlw/oPxN+aXdmM9R00JVC9WVFoCLTKJvDVLgmJ+qAffBMxsV85l/Lu7sNx4zSzPyoL2euImuEwHhOXdEgNFZQ==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
diff --git a/src/cli.ts b/src/cli.ts
index ba9d9ed..3d9989e 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -25,6 +25,7 @@ program
   .option('-p, --print', 'Print transformed files to stdout, useful for development', false)
   .option('--verbose', 'Show more information about the transform process', false)
   .option('--parser <parser>', 'Parser to use (tsx, ts, babel)', 'tsx')
+  .option('--allow-critical-errors', 'Allow writes even when critical validation errors are present', false)
   .action(
     async (
       codemodArg: string | undefined,
diff --git a/src/runner.ts b/src/runner.ts
index 46e75d3..eb36fcb 100644
--- a/src/runner.ts
+++ b/src/runner.ts
@@ -8,7 +8,7 @@ import type {
 } from './types';
 import type { Logger } from './utils/logger';
 import type { TransformInfo } from './transforms';
-import { createFileProcessor } from './utils/file-processor';
+import { createFileProcessor, type FileInfo } from './utils/file-processor';
 
 /**
  * Run the transformation on the target path
@@ -24,47 +24,37 @@ export async function runTransform(
   const applyTransform = transformModule.applyTransform;
 
   if (!applyTransform) {
-    throw new Error(`Transform ${transformInfo.name} does not export applyTransform function`);
+    throw new Error(
+      `Transform ${transformInfo.name} does not export applyTransform function`
+    );
   }
   // Step 1: Discover files
   logger.startSpinner('Discovering files..');
 
   const fileProcessor = createFileProcessor({
     extensions: ['.ts', '.tsx'],
-    ignorePatterns: [
-      '**/node_modules/**',
-      '**/dist/**',
-      '**/*.d.ts',
-    ],
+    ignorePatterns: ['**/node_modules/**', '**/dist/**', '**/*.d.ts'],
   });
 
   const allFiles = await fileProcessor.discoverFiles(targetPath);
   logger.succeedSpinner(`Found ${allFiles.length} files`);
 
-  // Step 2: Filter for source framework files
-  logger.startSpinner('Analyzing source framework usage..');
-  const sourceFiles = fileProcessor.filterSourceFiles(allFiles);
-
-  if (sourceFiles.length === 0) {
-    logger.warnSpinner('No source framework files found');
-    logger.info('No files contain source framework imports. Migration not needed.');
-    return createEmptySummary();
-  }
-
-  logger.succeedSpinner(`${sourceFiles.length} files contain source framework imports`);
-  logger.subsection(`${allFiles.length - sourceFiles.length} files skipped (no source imports)`);
-
-  logger.newline();
-
-  // Step 3: Transform files
+  // Step 2: Transform files
   logger.section('🔄 Transforming files...');
   const results: TransformResult[] = [];
   let filesTransformed = 0;
   let totalErrors = 0;
   let totalWarnings = 0;
-
-  for (const filePath of sourceFiles) {
-    const result = await transformFile(filePath, applyTransform, options, logger);
+  let sourceFilesCount = 0;
+
+  for (const fileInfo of fileProcessor.filterSourceFiles(allFiles)) {
+    sourceFilesCount++;
+    const result = await transformFile(
+      fileInfo,
+      applyTransform,
+      options,
+      logger
+    );
     results.push(result);
 
     if (result.transformed) {
@@ -75,20 +65,47 @@ export async function runTransform(
     totalWarnings += result.warnings.length;
   }
 
-  // Step 4: Report summary
+  // Check if any files were found
+  if (sourceFilesCount === 0) {
+    logger.warnSpinner('No source framework files found');
+    logger.info(
+      'No files contain source framework imports. Migration not needed.'
+    );
+    return createEmptySummary();
+  }
+
+  logger.succeedSpinner(
+    `${sourceFilesCount} files contain source framework imports`
+  );
+  logger.subsection(
+    `${allFiles.length - sourceFilesCount} files skipped (no source imports)`
+  );
+  logger.newline();
+
+  // Step 3: Report summary
   logger.newline();
   logger.section('📊 Migration Summary');
 
   if (filesTransformed > 0) {
-    logger.success(`${filesTransformed} file${filesTransformed > 1 ? 's' : ''} transformed successfully`);
+    logger.success(
+      `${filesTransformed} file${
+        filesTransformed > 1 ? 's' : ''
+      } transformed successfully`
+    );
   }
 
-  if (sourceFiles.length - filesTransformed > 0) {
-    logger.info(`  ${sourceFiles.length - filesTransformed} file${sourceFiles.length - filesTransformed > 1 ? 's' : ''} skipped (no changes needed)`);
+  if (sourceFilesCount - filesTransformed > 0) {
+    logger.info(
+      `  ${sourceFilesCount - filesTransformed} file${
+        sourceFilesCount - filesTransformed > 1 ? 's' : ''
+      } skipped (no changes needed)`
+    );
   }
 
   if (totalWarnings > 0) {
-    logger.warn(`${totalWarnings} warning${totalWarnings > 1 ? 's' : ''} found`);
+    logger.warn(
+      `${totalWarnings} warning${totalWarnings > 1 ? 's' : ''} found`
+    );
   }
 
   if (totalErrors > 0) {
@@ -114,11 +131,9 @@ export async function runTransform(
   }
 
   return {
-    filesProcessed: sourceFiles.length,
+    filesProcessed: sourceFilesCount,
     filesTransformed,
-    filesSkipped: sourceFiles.length - filesTransformed,
-    importsUpdated: 0, // TODO: Track this from transformers
-    mocksConfigured: 0, // TODO: Track this from transformers
+    filesSkipped: sourceFilesCount - filesTransformed,
     errors: totalErrors,
     warnings: totalWarnings,
     results,
@@ -129,13 +144,16 @@ export async function runTransform(
  * Transform a single file
  */
 async function transformFile(
-  filePath: string,
-  applyTransform: (source: string, options?: { skipValidation?: boolean; parser?: string }) => any,
+  fileInfo: FileInfo,
+  applyTransform: (
+    source: string,
+    options?: { skipValidation?: boolean; parser?: string }
+  ) => any,
   options: CliOptions,
   logger: Logger
 ): Promise<TransformResult> {
   const result: TransformResult = {
-    filePath,
+    filePath: fileInfo.path,
     transformed: false,
     changes: [],
     warnings: [],
@@ -143,9 +161,6 @@ async function transformFile(
   };
 
   try {
-    // Read source file
-    let source = await fs.readFile(filePath, 'utf-8');
-
     // Note: Preprocessing has been disabled because the parser fallback strategy
     // now uses ts/tsx parsers first, which handle TypeScript syntax correctly.
     // The preprocessing was breaking valid TypeScript generic syntax like:
@@ -157,13 +172,15 @@ async function transformFile(
     // more carefully to avoid breaking valid TypeScript patterns.
 
     // Apply transformation
-    const transformOutput = applyTransform(source, {
+    const transformOutput = applyTransform(fileInfo.source, {
       parser: options.parser,
     });
 
     // Check if code actually changed
-    if (transformOutput.code === source) {
-      logger.debug(`  ⊘ ${path.relative(process.cwd(), filePath)} (no changes)`);
+    if (transformOutput.code === fileInfo.source) {
+      logger.debug(
+        `  ⊘ ${path.relative(process.cwd(), fileInfo.path)} (no changes)`
+      );
       return result;
     }
 
@@ -178,93 +195,56 @@ async function transformFile(
       result.warnings.push(`${warn.rule}: ${warn.message}`);
     });
 
-    transformOutput.validation.criticalErrors.forEach((err: ValidationError) => {
-      result.errors.push(`[CRITICAL] ${err.rule}: ${err.message}`);
-    });
+    transformOutput.validation.criticalErrors.forEach(
+      (err: ValidationError) => {
+        result.errors.push(`[CRITICAL] ${err.rule}: ${err.message}`);
+      }
+    );
+
+    // Skip write if there are critical errors (unless explicitly allowed)
+    const hasCriticalErrors =
+      transformOutput.validation.criticalErrors.length > 0;
+    if (hasCriticalErrors && !options.allowCriticalErrors) {
+      logger.error(
+        `  ✗ ${path.relative(
+          process.cwd(),
+          fileInfo.path
+        )} (skipped due to critical errors)`
+      );
+      result.changes.push('Skipped (critical validation errors)');
+      return result;
+    }
 
     // Handle --print flag (output to stdout instead of writing)
     if (options.print) {
       logger.info(`\n${'='.repeat(60)}`);
-      logger.info(`File: ${filePath}`);
+      logger.info(`File: ${fileInfo.path}`);
       logger.info('='.repeat(60));
       console.log(transformOutput.code);
       logger.info('='.repeat(60));
       result.changes.push('Printed to stdout');
     } else if (!options.dry) {
       // Write transformed file
-      await fs.writeFile(filePath, transformOutput.code, 'utf-8');
+      await fs.writeFile(fileInfo.path, transformOutput.code, 'utf-8');
       result.changes.push('File updated');
-      logger.success(`  ${path.relative(process.cwd(), filePath)}`);
+      logger.success(`  ${path.relative(process.cwd(), fileInfo.path)}`);
     } else {
       // Dry run - just report what would change
       result.changes.push('Would be updated (dry)');
-      logger.info(`  ~ ${path.relative(process.cwd(), filePath)} (dry)`);
+      logger.info(`  ~ ${path.relative(process.cwd(), fileInfo.path)} (dry)`);
     }
   } catch (error) {
     const errorMessage =
       error instanceof Error ? error.message : 'Unknown error occurred';
     result.errors.push(errorMessage);
-    logger.error(`  ${path.relative(process.cwd(), filePath)}: ${errorMessage}`);
+    logger.error(
+      `  ${path.relative(process.cwd(), fileInfo.path)}: ${errorMessage}`
+    );
   }
 
   return result;
 }
 
-/**
- * Pre-process TypeScript import alias declarations
- * Converts: import X = jest.Y; → const X = jest.Y;
- * This syntax is TypeScript-specific and causes babel parser to fail
- */
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-function preprocessImportAliases(source: string): string {
-  // Match: import identifier = jest.something;
-  // or:   import identifier = Sinon.something;
-  return source.replace(
-    /^import\s+([a-zA-Z_$][a-zA-Z0-9_$]*)\s*=\s*(jest|sinon|Sinon)\.([a-zA-Z_$][a-zA-Z0-9_$]*)\s*;/gm,
-    'const $1 = $2.$3;'
-  );
-}
-
-/**
- * Pre-process source to convert old-style type casts that confuse the parser
- * Converts: <Type>value → value as Type
- * This prevents parse errors in .tsx files where <> is ambiguous (JSX vs type cast)
- */
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-function preprocessTypeCasts(source: string): string {
-  // Match common patterns:
-  // <Type>identifier
-  // <Type>{} or <Type>{ ... }
-  // <Type>[] or <Type>[...]
-  // <Type>(...)
-
-  // Pattern 1: <Type>identifier or <Type>identifier.property
-  let result = source.replace(
-    /<([A-Z][a-zA-Z0-9_<>[\],\s|&]*)>([a-zA-Z_$][a-zA-Z0-9_$]*(?:\.[a-zA-Z_$][a-zA-Z0-9_$]*)*)/g,
-    '$2 as $1'
-  );
-
-  // Pattern 2: <Type>{} or <Type>{ ... }
-  result = result.replace(
-    /<([A-Z][a-zA-Z0-9_<>[\],\s|&]*)>(\{[^}]*\})/g,
-    '($2 as $1)'
-  );
-
-  // Pattern 3: <Type>[] or <Type>[...]
-  result = result.replace(
-    /<([A-Z][a-zA-Z0-9_<>[\],\s|&]*)>(\[[^\]]*\])/g,
-    '($2 as $1)'
-  );
-
-  // Pattern 4: <Type>(...)
-  result = result.replace(
-    /<([A-Z][a-zA-Z0-9_<>[\],\s|&]*)>(\([^)]*\))/g,
-    '($2 as $1)'
-  );
-
-  return result;
-}
-
 /**
  * Create an empty migration summary
  */
@@ -273,8 +253,6 @@ function createEmptySummary(): MigrationSummary {
     filesProcessed: 0,
     filesTransformed: 0,
     filesSkipped: 0,
-    importsUpdated: 0,
-    mocksConfigured: 0,
     errors: 0,
     warnings: 0,
     results: [],
diff --git a/src/transform.ts b/src/transform.ts
index 0b14c86..ae0d1ed 100644
--- a/src/transform.ts
+++ b/src/transform.ts
@@ -1,7 +1,7 @@
 import jscodeshift from 'jscodeshift';
 import type { AnalysisContext, TransformOutput } from './types';
 import { detectSuitesContext } from './analyzers/context-detector';
-import { detectRetrievals} from './analyzers/retrieval-detector';
+import { detectRetrievals } from './analyzers/retrieval-detector';
 import { analyzeAllMockConfigurations } from './analyzers/stub-detector';
 import { transformImports } from './transforms/import-transformer';
 import { transformTestBed } from './transforms/testbed-transformer';
@@ -26,14 +26,18 @@ export function applyTransform(
   if (source.length === 0) {
     return {
       code: source,
-      validation: { success: true, errors: [], warnings: [], criticalErrors: [] },
+      validation: {
+        success: true,
+        errors: [],
+        warnings: [],
+        criticalErrors: [],
+      },
     };
   }
 
   // Parse with fallback strategy
   const { j, root } = parseSourceWithFallback(source, options?.parser);
 
-
   // Phase 1: Analysis
   const context: AnalysisContext = {
     isSuitesContext: detectSuitesContext(source),
@@ -71,10 +75,7 @@ export function applyTransform(
   cleanupObsoleteTypeCasts(j, root);
 
   // Phase 6: Post-transformation validation
-  const transformedSource = root.toSource({
-    quote: 'single',
-    trailingComma: true,
-  });
+  const transformedSource = root.toSource();
 
   const validation = options?.skipValidation
     ? { success: true, errors: [], warnings: [], criticalErrors: [] }
@@ -141,6 +142,6 @@ function parseSourceWithFallback(
   // All parsers failed - throw detailed error
   throw new Error(
     `Failed to parse source code with any available parser (tried: ${parsersToTry.join(', ')}). ` +
-    `Last error: ${lastError?.message || 'Unknown error'}`
+      `Last error: ${lastError?.message || 'Unknown error'}`
   );
 }
diff --git a/src/types.ts b/src/types.ts
index 9496a72..5bb4b5d 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -9,6 +9,7 @@ export interface CliOptions {
   parser: string;
   print: boolean;
   verbose: boolean;
+  allowCriticalErrors: boolean;
 }
 
 /**
@@ -106,8 +107,6 @@ export interface MigrationSummary {
   filesProcessed: number;
   filesTransformed: number;
   filesSkipped: number;
-  importsUpdated: number;
-  mocksConfigured: number;
   errors: number;
   warnings: number;
   results: TransformResult[];
diff --git a/src/utils/file-processor.ts b/src/utils/file-processor.ts
index d29e8cf..fafa8e0 100644
--- a/src/utils/file-processor.ts
+++ b/src/utils/file-processor.ts
@@ -8,6 +8,11 @@ export interface FileProcessorOptions {
   sourceImportPattern?: RegExp;
 }
 
+export interface FileInfo {
+  path: string;
+  source: string;
+}
+
 export class FileProcessor {
   private options: FileProcessorOptions;
 
@@ -52,9 +57,7 @@ export class FileProcessor {
    * Glob for files in a directory
    */
   private async globFiles(directory: string): Promise<string[]> {
-    const patterns = this.options.extensions.map(
-      (ext) => `**/*${ext}`
-    );
+    const patterns = this.options.extensions.map((ext) => `**/*${ext}`);
 
     const files: string[] = [];
 
@@ -108,12 +111,16 @@ export class FileProcessor {
   /**
    * Filter files that contain source framework imports
    * Default pattern matches Automock imports for backward compatibility
+   * Yields file info objects with path and source content to avoid double reads
+   * Uses a generator for memory efficiency with large file sets
    */
-  filterSourceFiles(files: string[]): string[] {
-    return files.filter((filePath) => {
+  *filterSourceFiles(files: string[]): Generator<FileInfo> {
+    for (const filePath of files) {
       const content = this.readFile(filePath);
-      return this.hasSourceImport(content);
-    });
+      if (this.hasSourceImport(content)) {
+        yield { path: filePath, source: content };
+      }
+    }
   }
 
   /**
@@ -121,7 +128,8 @@ export class FileProcessor {
    * Default pattern matches Automock imports for backward compatibility
    */
   private hasSourceImport(content: string): boolean {
-    const importPattern = this.options.sourceImportPattern ||
+    const importPattern =
+      this.options.sourceImportPattern ||
       /@automock\/(jest|sinon|core)['"]|from\s+['"]@automock\/(jest|sinon|core)['"]/;
     return importPattern.test(content);
   }
diff --git a/src/utils/logger.ts b/src/utils/logger.ts
index cab7266..b5e9297 100644
--- a/src/utils/logger.ts
+++ b/src/utils/logger.ts
@@ -124,15 +124,11 @@ export class Logger {
    */
   summary(stats: {
     filesTransformed: number;
-    importsUpdated: number;
-    mocksConfigured: number;
     errors: number;
     warnings: number;
   }): void {
     this.section('✅ Migration complete!');
     this.subsection(`${stats.filesTransformed} files transformed`);
-    this.subsection(`${stats.importsUpdated} imports updated`);
-    this.subsection(`${stats.mocksConfigured} mocks configured`);
     if (stats.errors > 0) {
       this.subsection(chalk.red(`${stats.errors} errors`));
     }
diff --git a/test/__snapshots__/parse-errors.spec.ts.snap b/test/__snapshots__/parse-errors.spec.ts.snap
index 390ccdf..231c82b 100644
--- a/test/__snapshots__/parse-errors.spec.ts.snap
+++ b/test/__snapshots__/parse-errors.spec.ts.snap
@@ -1,7 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Parse Error Handling Category 1: Multi-Variable Declarations with Generics (18 files) should parse and transform files with multi-variable let declarations containing jest.Mocked generics 1`] = `
-"import { TestBed, type Mocked } from '@suites/unit';
+"import { TestBed, type Mocked } from "@suites/unit";
 
 let service: InternalTransactionUpdateService,
     chargeService: Mocked<ChargeService>,
@@ -24,7 +24,7 @@ describe('Test', () => {
 `;
 
 exports[`Parse Error Handling Category 2: TypeScript Type Assertions in Generics (3 files) should parse and transform files with type assertions in expect().resolves.toStrictEqual 1`] = `
-"import { TestBed, type Mocked } from '@suites/unit';
+"import { TestBed, type Mocked } from "@suites/unit";
 
 describe('TypeAssertionTests', () => {
   let service: PaymentService;
@@ -54,7 +54,7 @@ describe('TypeAssertionTests', () => {
 `;
 
 exports[`Parse Error Handling Category 3: Function Call Syntax Issues (3 files) should parse and transform files with spread syntax in function parameters 1`] = `
-"import { TestBed } from '@suites/unit';
+"import { TestBed } from "@suites/unit";
 
 describe('SpreadParamTests', () => {
   const payoutsFactory = (
@@ -78,7 +78,7 @@ describe('SpreadParamTests', () => {
 `;
 
 exports[`Parse Error Handling Real-world Integration: Multiple Parse Error Categories should parse and transform complex files combining multiple error patterns 1`] = `
-"import { TestBed, type Mocked } from '@suites/unit';
+"import { TestBed, type Mocked } from "@suites/unit";
 
 let service: MyService,
     mockRepo: Mocked<Repository>,
diff --git a/test/e2e/cli-e2e.spec.ts b/test/e2e/cli-e2e.spec.ts
new file mode 100644
index 0000000..d4d34bc
--- /dev/null
+++ b/test/e2e/cli-e2e.spec.ts
@@ -0,0 +1,219 @@
+/**
+ * End-to-end tests for the CLI
+ *
+ * These tests run the actual CLI command on fixture files
+ * to verify the complete transformation pipeline works correctly.
+ */
+
+import { execSync } from 'child_process';
+import { mkdtemp, writeFile, readFile, rm } from 'fs/promises';
+import { join } from 'path';
+import { tmpdir } from 'os';
+import { loadFixturePair } from '../utils/fixture-loader';
+
+describe('CLI E2E Tests', () => {
+  let tempDir: string;
+
+  beforeEach(async () => {
+    // Create a temporary directory for each test
+    tempDir = await mkdtemp(join(tmpdir(), 'codemod-e2e-'));
+  });
+
+  afterEach(async () => {
+    // Clean up temporary directory
+    try {
+      await rm(tempDir, { recursive: true, force: true });
+    } catch {
+      // Ignore cleanup errors
+    }
+  });
+
+  describe('Basic Transformations', () => {
+    it('should transform a simple fixture file via CLI', async () => {
+      const fixtures = loadFixturePair('complex-impl');
+
+      // Write input file to temp directory
+      const inputFile = join(tempDir, 'test.ts');
+      await writeFile(inputFile, fixtures.input, 'utf-8');
+
+      // Run CLI in dry mode
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+      const result = execSync(
+        `node ${cliPath} automock/2/to-suites-v3 ${tempDir} --dry --force`,
+        {
+          cwd: process.cwd(),
+          encoding: 'utf-8',
+          stdio: 'pipe',
+        }
+      );
+
+      // Verify CLI ran successfully
+      expect(result).toBeDefined();
+      expect(result).toMatch(/file.*transformed|files transformed/i);
+    });
+
+    it('should actually transform files when not in dry mode', async () => {
+      const fixtures = loadFixturePair('complex-impl');
+
+      // Write input file to temp directory
+      const inputFile = join(tempDir, 'test.ts');
+      await writeFile(inputFile, fixtures.input, 'utf-8');
+
+      // Run CLI (not in dry mode, with force to skip git check)
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+      execSync(`node ${cliPath} automock/2/to-suites-v3 ${tempDir} --force`, {
+        cwd: process.cwd(),
+        encoding: 'utf-8',
+        stdio: 'pipe',
+      });
+
+      // Read the transformed file
+      const transformedContent = await readFile(inputFile, 'utf-8');
+
+      // Verify transformation occurred
+      expect(transformedContent).toContain('@suites/unit');
+      expect(transformedContent).not.toContain('@automock/jest');
+      expect(transformedContent).toContain('TestBed.solitary');
+      expect(transformedContent).not.toContain('TestBed.create');
+      expect(transformedContent).toContain('.impl(');
+      expect(transformedContent).not.toContain('.using(');
+    });
+
+    it('should transform multiple files in a directory', async () => {
+      const fixtures1 = loadFixturePair('token-injection');
+      const fixtures2 = loadFixturePair('complex-impl');
+
+      // Write multiple input files
+      await writeFile(join(tempDir, 'test1.ts'), fixtures1.input, 'utf-8');
+      await writeFile(join(tempDir, 'test2.ts'), fixtures2.input, 'utf-8');
+
+      // Run CLI
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+      const result = execSync(
+        `node ${cliPath} automock/2/to-suites-v3 ${tempDir} --force`,
+        {
+          cwd: process.cwd(),
+          encoding: 'utf-8',
+          stdio: 'pipe',
+        }
+      );
+
+      // Verify both files were transformed
+      const transformed1 = await readFile(join(tempDir, 'test1.ts'), 'utf-8');
+      const transformed2 = await readFile(join(tempDir, 'test2.ts'), 'utf-8');
+
+      expect(transformed1).toContain('@suites/unit');
+      expect(transformed2).toContain('@suites/unit');
+      expect(result).toContain('files transformed');
+    });
+  });
+
+  describe('CLI Options', () => {
+    it('should respect --dry flag and not modify files', async () => {
+      const fixtures = loadFixturePair('complex-impl');
+
+      const inputFile = join(tempDir, 'test.ts');
+      await writeFile(inputFile, fixtures.input, 'utf-8');
+
+      // Run CLI in dry mode
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+      execSync(
+        `node ${cliPath} automock/2/to-suites-v3 ${tempDir} --dry --force`,
+        {
+          cwd: process.cwd(),
+          encoding: 'utf-8',
+          stdio: 'pipe',
+        }
+      );
+
+      // Verify file was NOT modified
+      const content = await readFile(inputFile, 'utf-8');
+      expect(content).toBe(fixtures.input);
+      expect(content).toContain('@automock/jest');
+    });
+
+    it('should respect --print flag and output to stdout', async () => {
+      const fixtures = loadFixturePair('complex-impl');
+
+      const inputFile = join(tempDir, 'test.ts');
+      await writeFile(inputFile, fixtures.input, 'utf-8');
+
+      // Run CLI with print flag
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+      const result = execSync(
+        `node ${cliPath} automock/2/to-suites-v3 ${inputFile} --print --force`,
+        {
+          cwd: process.cwd(),
+          encoding: 'utf-8',
+          stdio: 'pipe',
+        }
+      );
+
+      // Verify output contains transformed code
+      expect(result).toContain('@suites/unit');
+      expect(result).toContain('TestBed.solitary');
+
+      // Verify file was NOT modified (print mode doesn't write)
+      const content = await readFile(inputFile, 'utf-8');
+      expect(content).toBe(fixtures.input);
+    });
+
+    it('should handle --verbose flag', async () => {
+      const fixtures = loadFixturePair('complex-impl');
+
+      const inputFile = join(tempDir, 'test.ts');
+      await writeFile(inputFile, fixtures.input, 'utf-8');
+
+      // Run CLI with verbose flag
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+      const result = execSync(
+        `node ${cliPath} automock/2/to-suites-v3 ${tempDir} --verbose --force --dry`,
+        {
+          cwd: process.cwd(),
+          encoding: 'utf-8',
+          stdio: 'pipe',
+        }
+      );
+
+      // Verify verbose output is present
+      expect(result).toBeDefined();
+      // jscodeshift will output processing information
+    });
+  });
+
+  describe('Error Handling', () => {
+    it('should exit with error code for invalid codemod', () => {
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+
+      expect(() => {
+        execSync(`node ${cliPath} invalid/codemod ${tempDir} --force`, {
+          cwd: process.cwd(),
+          encoding: 'utf-8',
+          stdio: 'pipe',
+        });
+      }).toThrow();
+    });
+
+    it('should exit with error code for non-existent path', () => {
+      const cliPath = join(__dirname, '../../bin/suites-codemod.js');
+
+      try {
+        execSync(
+          `node ${cliPath} automock/2/to-suites-v3 /non/existent/path --force`,
+          {
+            cwd: process.cwd(),
+            encoding: 'utf-8',
+            stdio: 'pipe',
+          }
+        );
+        // If we get here, the command didn't throw - that's also acceptable
+        // as jscodeshift might handle missing paths gracefully
+      } catch (error: any) {
+        // Command threw an error, which is expected
+        expect(error).toBeDefined();
+        // Verify it's an error (exit code non-zero or error message)
+        expect(error.status || error.message).toBeDefined();
+      }
+    });
+  });
+});
diff --git a/test/integration/__snapshots__/snapshot-tests.spec.ts.snap b/test/integration/__snapshots__/snapshot-tests.spec.ts.snap
index 707dbc2..593115c 100644
--- a/test/integration/__snapshots__/snapshot-tests.spec.ts.snap
+++ b/test/integration/__snapshots__/snapshot-tests.spec.ts.snap
@@ -1,7 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Snapshot Tests Basic Examples from Specification should transform complex mock with .impl() and retrieval 1`] = `
-"import { TestBed, type Mocked } from '@suites/unit';
+"import { TestBed, type Mocked } from "@suites/unit";
 import { jest } from '@jest/globals';
 
 describe('OrderService', () => {
@@ -14,11 +14,11 @@ describe('OrderService', () => {
       .mock(OrderRepository)
       .impl(stubFn => ({
       findById: stubFn(),
-      save: stubFn().mockResolvedValue(true),
+      save: stubFn().mockResolvedValue(true)
     }))
       .mock(PaymentGateway)
       .impl(stubFn => ({
-      charge: stubFn().mockResolvedValue({ success: true }),
+      charge: stubFn().mockResolvedValue({ success: true })
     }))
       .compile();
 
@@ -66,7 +66,7 @@ describe('UserService', () => {
 `;
 
 exports[`Snapshot Tests Basic Examples from Specification should transform token injection 1`] = `
-"import { TestBed } from '@suites/unit';
+"import { TestBed } from "@suites/unit";
 
 describe('ApiService', () => {
   let service: ApiService;
@@ -86,7 +86,7 @@ describe('ApiService', () => {
 `;
 
 exports[`Snapshot Tests Edge Cases should handle various edge cases correctly 1`] = `
-"import { TestBed } from '@suites/unit';
+"import { TestBed } from "@suites/unit";
 
 describe('Edge Cases', () => {
   // Already async function
@@ -130,7 +130,7 @@ describe('Edge Cases', () => {
 `;
 
 exports[`Snapshot Tests Mixed .impl() and .final() should correctly apply .impl() to retrieved mocks and .final() to others 1`] = `
-"import { TestBed, type Mocked } from '@suites/unit';
+"import { TestBed, type Mocked } from "@suites/unit";
 
 describe('NotificationService', () => {
   let service: NotificationService;
@@ -141,7 +141,7 @@ describe('NotificationService', () => {
       .mock(EmailService)
       .impl(stubFn => ({
       send: stubFn(),
-      validate: stubFn(),
+      validate: stubFn()
     }))
       .mock(Config)
       .final({
@@ -156,7 +156,7 @@ describe('NotificationService', () => {
       })
       .mock(Logger)
       .impl(stubFn => ({
-      log: stubFn(),
+      log: stubFn()
     }))
       .compile();
 
@@ -176,7 +176,7 @@ describe('NotificationService', () => {
 `;
 
 exports[`Snapshot Tests Multiple Test Hooks should transform TestBed in beforeAll, beforeEach, and test blocks 1`] = `
-"import { TestBed } from '@suites/unit';
+"import { TestBed } from "@suites/unit";
 
 describe('TaskService', () => {
   let service: TaskService;
@@ -185,7 +185,7 @@ describe('TaskService', () => {
     const { unit } = await TestBed.solitary(TaskService)
       .mock(TaskRepository)
       .impl(stubFn => ({
-      findAll: stubFn(),
+      findAll: stubFn()
     }))
       .compile();
 
@@ -206,7 +206,7 @@ describe('TaskService', () => {
     const { unit, unitRef } = await TestBed.solitary(TaskService)
       .mock(TaskRepository)
       .impl(stubFn => ({
-      create: stubFn(),
+      create: stubFn()
     }))
       .compile();
 
@@ -228,7 +228,7 @@ describe('TaskService', () => {
 `;
 
 exports[`Snapshot Tests Sinon Framework should transform Sinon-based tests 1`] = `
-"import { TestBed, type Mocked } from '@suites/unit';
+"import { TestBed, type Mocked } from "@suites/unit";
 
 describe('PaymentService', () => {
   let service: PaymentService;
@@ -240,12 +240,12 @@ describe('PaymentService', () => {
       .mock(PaymentGateway)
       .impl(stubFn => ({
       charge: stubFn(),
-      refund: stubFn(),
+      refund: stubFn()
     }))
       .mock(Logger)
       .impl(stubFn => ({
       info: stubFn(),
-      error: stubFn(),
+      error: stubFn()
     }))
       .compile();
 
@@ -267,7 +267,7 @@ describe('PaymentService', () => {
 `;
 
 exports[`Snapshot Tests Type Cast Cleanup should remove obsolete type casts 1`] = `
-"import { TestBed, type Mocked } from '@suites/unit';
+"import { TestBed, type Mocked } from "@suites/unit";
 
 describe('UserController', () => {
   let controller: UserController;
@@ -303,7 +303,7 @@ describe('UserController', () => {
 `;
 
 exports[`Snapshot Tests UnitReference Usage should handle UnitReference imports and usage 1`] = `
-"import { TestBed, type UnitReference, type Mocked } from '@suites/unit';
+"import { TestBed, type UnitReference, type Mocked } from "@suites/unit";
 
 describe('ProductService', () => {
   let service: ProductService;
@@ -316,7 +316,7 @@ describe('ProductService', () => {
       .impl(stubFn => ({
       find: stubFn(),
       save: stubFn(),
-      delete: stubFn(),
+      delete: stubFn()
     }))
       .compile();