diff --git a/src/categories/category-ai.service.ts b/src/categories/category-ai.service.ts
index d3b1a69..67fa907 100644
--- a/src/categories/category-ai.service.ts
+++ b/src/categories/category-ai.service.ts
@@ -105,7 +105,7 @@ Rules:
 - Use 2-6 top-level categories when appropriate.
 - Add subcategories only where they help shoppers browse (max depth ${MAX_DEPTH}).
 - Every node needs nameEn and nameFa (Farsi in Persian script).
-- Descriptions are optional, max 120 characters, English only.
+- Descriptions are optional, max 120 characters. Match the user prompt language (Persian if the prompt is Persian, otherwise English).
 - Do not duplicate category names at the same level.
 - Total nodes must not exceed ${MAX_TOTAL}.`;
 
diff --git a/src/categories/category-technical-form-ai.service.ts b/src/categories/category-technical-form-ai.service.ts
index d495d96..1239a55 100644
--- a/src/categories/category-technical-form-ai.service.ts
+++ b/src/categories/category-technical-form-ai.service.ts
@@ -92,7 +92,7 @@ Return ONLY valid JSON with this shape:
 {
   "fields": [
     {
-      "label": "Field label in English",
+      "label": "Field label",
       "type": "text | textarea | select | multi_select",
       "isRequired": true,
       "options": ["Option A", "Option B"]
@@ -108,6 +108,7 @@ Rules:
 - textarea fields are for longer specs (features, care instructions).
 - Mark important buyer-facing specs as required.
 - Labels must be unique and human-readable.
+- Write labels and option text in the same language as the user hint. If the hint is Persian (Farsi), use Persian labels and options; otherwise use English.
 - Do not include price, stock, SKU, or warranty period fields.
 - Prefer metric units common in Iran when relevant.`;
 
diff --git a/src/products/dto/product-ai.dto.ts b/src/products/dto/product-ai.dto.ts
index 2656a74..f17e371 100644
--- a/src/products/dto/product-ai.dto.ts
+++ b/src/products/dto/product-ai.dto.ts
@@ -1,4 +1,4 @@
-import { IsEnum, IsOptional, IsString, MinLength, ValidateIf } from 'class-validator';
+import { IsEnum, IsOptional, IsString, MaxLength, MinLength, ValidateIf } from 'class-validator';
 
 export enum ProductAiLanguage {
   en = 'en',
@@ -16,8 +16,10 @@ export class CreateProductByAiDto {
   @MinLength(1)
   categoryId!: string;
 
+  /** Product brief for AI: model name, optional URL, and notes. */
   @IsString()
   @MinLength(2)
+  @MaxLength(4000)
   name!: string;
 
   @IsEnum(ProductAiLanguage)
diff --git a/src/products/product-ai.service.ts b/src/products/product-ai.service.ts
index feb7abd..470c594 100644
--- a/src/products/product-ai.service.ts
+++ b/src/products/product-ai.service.ts
@@ -285,18 +285,21 @@ Return ONLY valid JSON with this shape:
 }
 
 Rules:
-- Be factual and realistic for the named product in the given category.
+- The user input is a research brief in ${inputLanguage}. It may include a model/product name, a product page URL, and extra notes — not a final storefront title.
+- Infer the real product from the brief (and any URL/model clues). Do not copy URLs, markdown, or raw notes into title/nameFa.
+- Write clean storefront titles: "title" in English, "nameFa" in Persian. Keep brand/model accurate.
+- Be factual and realistic for the identified product in the given category.
 - If technical form fields are provided, fill technicalValues using exact field keys.
 - For select fields use one allowed option value exactly.
 - For multi_select fields use an array of allowed option values.
 - For text/textarea fields use plain strings.
-- The user input name is in ${inputLanguage}; keep that spelling in the matching field and translate/generate the other language field.
+- Prefer the input language for summary/description tone, but always return both title and nameFa.
 - descriptionHtml should be 2-4 paragraphs with key specs.
 - tags: 3-8 relevant lowercase tags.`;
 
     const userPrompt = JSON.stringify({
       category: input.categoryName,
-      inputName: input.productName,
+      researchBrief: input.productName,
       inputLanguage: input.language,
       technicalFields: technicalSchema,
     });
@@ -327,15 +330,9 @@ Rules:
       fields: TechnicalFormField[];
     },
   ): AiProductDraft {
-    const title =
-      input.language === ProductAiLanguage.en
-        ? input.productName
-        : String(draft.title ?? input.productName).trim();
-
-    const nameFa =
-      input.language === ProductAiLanguage.fa
-        ? input.productName
-        : String(draft.nameFa ?? '').trim();
+    const fallbackName = this.shortProductLabel(input.productName);
+    const title = String(draft.title ?? '').trim() || fallbackName;
+    const nameFa = String(draft.nameFa ?? '').trim() || fallbackName;
 
     const summary = String(draft.summary ?? '').trim();
     const descriptionHtml = normalizeAiDescriptionHtml(
@@ -395,4 +392,14 @@ Rules:
       technicalValues,
     };
   }
+
+  /** First non-URL line of the research brief, truncated for fallback titles. */
+  private shortProductLabel(brief: string): string {
+    const line =
+      brief
+        .split(/\r?\n/)
+        .map((part) => part.trim())
+        .find((part) => part && !/^https?:\/\//i.test(part)) ?? brief.trim();
+    return line.slice(0, 120).trim();
+  }
 }