diff --git a/packages/liquid-forge/lib/inject-assets.ts b/packages/liquid-forge/lib/inject-assets.ts
index aaf33352..2058853a 100644
--- a/packages/liquid-forge/lib/inject-assets.ts
+++ b/packages/liquid-forge/lib/inject-assets.ts
@@ -15,6 +15,7 @@
  */
 
 import { ThemeStudioScriptInjector } from '../services/rendering/theme-studio-script-injector';
+import { logger } from './logger';
 
 /**
  * Utilidad para inyectar CSS y JS en el HTML renderizado
@@ -24,6 +25,13 @@ import { ThemeStudioScriptInjector } from '../services/rendering/theme-studio-sc
  * @returns El HTML con los assets inyectados
  */
 export function injectAssets(html: string, assetCollector: any, domain?: string): string {
+  logger.info('[injectAssets] Iniciando inyección de assets', {
+    htmlLength: html.length,
+    domain,
+    hasDomain: !!domain,
+    hasThemeStudioScript: html.includes('data-fasttify-theme-studio="true"'),
+  });
+
   let finalHtml = html;
   const css = assetCollector.getCombinedCss();
   const js = assetCollector.getCombinedJs();
@@ -44,7 +52,20 @@ export function injectAssets(html: string, assetCollector: any, domain?: string)
 
   // Inyectar script del ThemeStudio en todas las tiendas
   if (domain) {
+    const beforeLength = finalHtml.length;
     finalHtml = ThemeStudioScriptInjector.injectScript(finalHtml, domain);
+    const afterLength = finalHtml.length;
+    logger.info('[injectAssets] Script del ThemeStudio procesado', {
+      domain,
+      beforeLength,
+      afterLength,
+      difference: afterLength - beforeLength,
+      finalScriptCount: (finalHtml.match(/data-fasttify-theme-studio="true"/g) || []).length,
+    });
+  } else {
+    logger.info('[injectAssets] No se inyecta script del ThemeStudio - sin dominio', {
+      domain,
+    });
   }
 
   return finalHtml;
diff --git a/packages/liquid-forge/services/rendering/theme-studio-script-injector.ts b/packages/liquid-forge/services/rendering/theme-studio-script-injector.ts
index 4a74758a..7792762f 100644
--- a/packages/liquid-forge/services/rendering/theme-studio-script-injector.ts
+++ b/packages/liquid-forge/services/rendering/theme-studio-script-injector.ts
@@ -15,6 +15,7 @@
  */
 
 import { iframeSelectionScript } from '@fasttify/theme-studio';
+import { logger } from '../../lib/logger';
 
 /**
  * Servicio para inyectar el script del ThemeStudio en el HTML renderizado
@@ -26,7 +27,16 @@ export class ThemeStudioScriptInjector {
    * @returns El script completo como string
    */
   static generateScript(domain: string | undefined): string {
-    return iframeSelectionScript(domain || null);
+    logger.info('[ThemeStudioScriptInjector] Generando script', {
+      domain,
+      hasDomain: !!domain,
+    });
+    const script = iframeSelectionScript(domain || null);
+    logger.info('[ThemeStudioScriptInjector] Script generado', {
+      scriptLength: script.length,
+      scriptPreview: script.substring(0, 200),
+    });
+    return script;
   }
 
   /**
@@ -36,21 +46,63 @@ export class ThemeStudioScriptInjector {
    * @returns El HTML con el script inyectado
    */
   static injectScript(html: string, domain: string | undefined): string {
-    if (html.includes('data-fasttify-theme-studio="true"')) {
+    const hasExistingScript = html.includes('data-fasttify-theme-studio="true"');
+    const scriptCount = (html.match(/data-fasttify-theme-studio="true"/g) || []).length;
+
+    logger.info('[ThemeStudioScriptInjector] Intentando inyectar script', {
+      domain,
+      htmlLength: html.length,
+      hasExistingScript,
+      scriptCount,
+      hasHead: html.includes('</head>'),
+      hasBody: html.includes('</body>'),
+    });
+
+    if (hasExistingScript) {
+      logger.warn('[ThemeStudioScriptInjector] Script ya existe, evitando duplicado', {
+        scriptCount,
+        domain,
+      });
       return html;
     }
 
     const script = this.generateScript(domain);
     const scriptTag = `<script data-fasttify-theme-studio="true">${script}</script>`;
 
+    let result: string;
     if (html.includes('</head>')) {
-      return html.replace('</head>', `${scriptTag}</head>`);
+      result = html.replace('</head>', `${scriptTag}</head>`);
+      logger.info('[ThemeStudioScriptInjector] Script inyectado en </head>', {
+        domain,
+        resultLength: result.length,
+        scriptTagLength: scriptTag.length,
+      });
+    } else if (html.includes('</body>')) {
+      result = html.replace('</body>', `${scriptTag}</body>`);
+      logger.info('[ThemeStudioScriptInjector] Script inyectado en </body>', {
+        domain,
+        resultLength: result.length,
+        scriptTagLength: scriptTag.length,
+      });
+    } else {
+      result = html + scriptTag;
+      logger.info('[ThemeStudioScriptInjector] Script inyectado al final', {
+        domain,
+        resultLength: result.length,
+        scriptTagLength: scriptTag.length,
+      });
     }
 
-    if (html.includes('</body>')) {
-      return html.replace('</body>', `${scriptTag}</body>`);
+    // Verificar que se inyectó correctamente
+    const finalScriptCount = (result.match(/data-fasttify-theme-studio="true"/g) || []).length;
+    if (finalScriptCount !== 1) {
+      logger.error('[ThemeStudioScriptInjector] Error: Script inyectado múltiples veces', {
+        domain,
+        finalScriptCount,
+        expectedCount: 1,
+      });
     }
 
-    return html + scriptTag;
+    return result;
   }
 }