diff --git a/src/generators/clean-arch.generator.ts b/src/generators/clean-arch.generator.ts
index b4b34f7..d9b0203 100644
--- a/src/generators/clean-arch.generator.ts
+++ b/src/generators/clean-arch.generator.ts
@@ -3,6 +3,7 @@ import path from 'path';
 import mustache from 'mustache';
 import { logStep, logSuccess, logInfo } from '../utils/logger';
 import { mapSwaggerTypeToTs } from '../utils/type-mapper';
+import { toCamelCase } from '../utils/name-formatter';
 import type {
   SwaggerAnalysis,
   OpenApiSchema,
@@ -58,8 +59,8 @@ export function generateCleanArchitecture(
         {
           model: {
             classname: baseName,
-            classFilename: baseName.toLowerCase(),
-            classVarName: baseName.charAt(0).toLowerCase() + baseName.slice(1),
+            classFilename: toCamelCase(baseName),
+            classVarName: toCamelCase(baseName),
             description: schemaObj.description || '',
             vars: varsMap
           }
@@ -75,8 +76,8 @@ export function generateCleanArchitecture(
           {
             operations: {
               classname: baseName,
-              classFilename: baseName.toLowerCase(),
-              classVarName: baseName.charAt(0).toLowerCase() + baseName.slice(1)
+              classFilename: toCamelCase(baseName),
+              classVarName: toCamelCase(baseName)
             }
           }
         ]
@@ -88,14 +89,10 @@ export function generateCleanArchitecture(
     if (fs.existsSync(modelTemplatePath)) {
       const template = fs.readFileSync(modelTemplatePath, 'utf8');
       const output = mustache.render(template, modelViewData);
-      const destPath = path.join(
-        outputDir,
-        'entities/models',
-        `${baseName.toLowerCase()}.model.ts`
-      );
+      const destPath = path.join(outputDir, 'entities/models', `${toCamelCase(baseName)}.model.ts`);
       fs.writeFileSync(destPath, output);
       generatedCount.models++;
-      logInfo(`  ${baseName.toLowerCase()}.model.ts → ${path.relative(process.cwd(), destPath)}`);
+      logInfo(`  ${toCamelCase(baseName)}.model.ts → ${path.relative(process.cwd(), destPath)}`);
     }
 
     // Mapper
@@ -103,7 +100,7 @@ export function generateCleanArchitecture(
     if (fs.existsSync(mapperTemplatePath)) {
       const template = fs.readFileSync(mapperTemplatePath, 'utf8');
       const output = mustache.render(template, mapperViewData);
-      const destPath = path.join(outputDir, 'data/mappers', `${baseName.toLowerCase()}.mapper.ts`);
+      const destPath = path.join(outputDir, 'data/mappers', `${toCamelCase(baseName)}.mapper.ts`);
       fs.writeFileSync(destPath, output);
       generatedCount.mappers++;
     }
@@ -192,8 +189,8 @@ export function generateCleanArchitecture(
       if (tagsMap[tag].some((op) => op.returnType === s || op.returnType === `Array<${s}>`)) {
         imports.push({
           classname: s,
-          classFilename: s.toLowerCase(),
-          classVarName: s.charAt(0).toLowerCase() + s.slice(1)
+          classFilename: toCamelCase(s),
+          classVarName: toCamelCase(s)
         });
       }
     });
@@ -204,7 +201,7 @@ export function generateCleanArchitecture(
           {
             operations: {
               classname: tag,
-              classFilename: tag.toLowerCase(),
+              classFilename: toCamelCase(tag),
               constantName: tag.toUpperCase().replace(/[^A-Z0-9]/g, '_'),
               operation: tagsMap[tag],
               imports: imports
@@ -218,7 +215,7 @@ export function generateCleanArchitecture(
       templatesDir,
       'api.use-cases.contract.mustache',
       apiViewData,
-      path.join(outputDir, 'domain/use-cases', `${tag.toLowerCase()}.use-cases.contract.ts`),
+      path.join(outputDir, 'domain/use-cases', `${toCamelCase(tag)}.use-cases.contract.ts`),
       generatedCount,
       'useCases'
     );
@@ -227,7 +224,7 @@ export function generateCleanArchitecture(
       templatesDir,
       'api.use-cases.impl.mustache',
       apiViewData,
-      path.join(outputDir, 'domain/use-cases', `${tag.toLowerCase()}.use-cases.impl.ts`),
+      path.join(outputDir, 'domain/use-cases', `${toCamelCase(tag)}.use-cases.impl.ts`),
       generatedCount,
       'useCases'
     );
@@ -236,7 +233,7 @@ export function generateCleanArchitecture(
       templatesDir,
       'api.repository.contract.mustache',
       apiViewData,
-      path.join(outputDir, 'domain/repositories', `${tag.toLowerCase()}.repository.contract.ts`),
+      path.join(outputDir, 'domain/repositories', `${toCamelCase(tag)}.repository.contract.ts`),
       generatedCount,
       'repositories'
     );
@@ -245,7 +242,7 @@ export function generateCleanArchitecture(
       templatesDir,
       'api.repository.impl.mustache',
       apiViewData,
-      path.join(outputDir, 'data/repositories', `${tag.toLowerCase()}.repository.impl.ts`),
+      path.join(outputDir, 'data/repositories', `${toCamelCase(tag)}.repository.impl.ts`),
       generatedCount,
       'repositories'
     );
@@ -254,7 +251,7 @@ export function generateCleanArchitecture(
       templatesDir,
       'use-cases.provider.mustache',
       apiViewData,
-      path.join(outputDir, 'di/use-cases', `${tag.toLowerCase()}.use-cases.provider.ts`),
+      path.join(outputDir, 'di/use-cases', `${toCamelCase(tag)}.use-cases.provider.ts`),
       generatedCount,
       'providers'
     );
@@ -263,7 +260,7 @@ export function generateCleanArchitecture(
       templatesDir,
       'repository.provider.mustache',
       apiViewData,
-      path.join(outputDir, 'di/repositories', `${tag.toLowerCase()}.repository.provider.ts`),
+      path.join(outputDir, 'di/repositories', `${toCamelCase(tag)}.repository.provider.ts`),
       generatedCount,
       'providers'
     );
diff --git a/src/utils/name-formatter.ts b/src/utils/name-formatter.ts
new file mode 100644
index 0000000..c6ff94b
--- /dev/null
+++ b/src/utils/name-formatter.ts
@@ -0,0 +1,12 @@
+/**
+ * Converts a PascalCase name to camelCase by lowercasing the first character.
+ * Used to derive class filenames and variable names from schema/tag names.
+ *
+ * @example
+ * toCamelCase('ProductResponse') // 'productResponse'
+ * toCamelCase('UserSchema')      // 'userSchema'
+ */
+export function toCamelCase(name: string): string {
+  if (!name) return name;
+  return name.charAt(0).toLowerCase() + name.slice(1);
+}