feat: strip --- delimiters from eBay text output, commercial listing prompt

Agent now extracts content between --- markers so LLM preamble/postamble
is discarded. ebay_description prompt updated for commercial listings:
no private-sale language, condition explicitly "gebraucht", 1 year
gesetzliche Gewährleistung. Device label now includes modelName.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

migrations/Version20260520070000.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260520070000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Update eBay prompts: --- delimiters, commercial language, 1-year warranty';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $title = <<<'PROMPT'
+Create a concise eBay listing title (max 80 characters) for this {{typeName}}.
+Device: {{deviceLabel}}
+Condition: {{condition}} (used/gebraucht)
+{{specsSection}}
+Rules: no quotes, no explanation, no private-sale language.
+Wrap your answer between --- delimiters like this:
+---
+your title here
+---
+PROMPT;
+
+        $description = <<<'PROMPT'
+Erstelle eine professionelle eBay-Artikelbeschreibung auf Deutsch für diesen {{typeName}}.
+Gerät: {{deviceLabel}}
+Zustand: gebraucht — {{condition}}
+{{conditionNotes}}
+{{specsSection}}
+
+Wichtige Vorgaben:
+- Gewerbliches Angebot (kein Privatverkauf, keine Privatverkauf-Ausschlussklauseln)
+- 1 Jahr gesetzliche Gewährleistung
+- Zustand "gebraucht" klar erwähnen
+- Alle verfügbaren technischen Daten strukturiert auflisten
+- HTML-Formatierung verwenden (ul, li, strong-Tags)
+- Maximal 2000 Zeichen
+
+Gib NUR den HTML-Beschreibungstext aus, eingefasst zwischen --- Trennzeichen:
+---
+HTML hier
+---
+PROMPT;
+
+        $this->addSql('UPDATE app.prompt_templates SET body = :body, updated_at = NOW() WHERE key = :key', [
+            'body' => $title, 'key' => 'ebay_title',
+        ]);
+        $this->addSql('UPDATE app.prompt_templates SET body = :body, updated_at = NOW() WHERE key = :key', [
+            'body' => $description, 'key' => 'ebay_description',
+        ]);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql("UPDATE app.prompt_templates SET body = 'Create a concise eBay listing title (max 80 characters) for this {{typeName}}.\nDevice: {{deviceLabel}}\nUse the most important specifications. Include condition if not \"new\".\nCondition: {{condition}}\n{{specsSection}}\nReturn ONLY the title text, no quotes, no explanation.', updated_at = NOW() WHERE key = 'ebay_title'");
+        $this->addSql("UPDATE app.prompt_templates SET body = 'Create a professional eBay listing description in German for this {{typeName}}.\nDevice: {{deviceLabel}}\nInclude all available specifications in a clear, structured format.\nMention the condition: {{condition}}.\n{{conditionNotes}}\n{{specsSection}}\nUse HTML formatting (ul, li, strong tags). Max 2000 characters.', updated_at = NOW() WHERE key = 'ebay_description'");
+    }
+}

src/Infrastructure/AI/Agent/EbayTextAgent.php

@@ -17,6 +17,15 @@ final class EbayTextAgent
     ) {
     }
 
+    private function extractBetweenDelimiters(string $raw): string
+    {
+        if (preg_match('/---\s*\n(.*?)\n\s*---/s', $raw, $matches)) {
+            return trim($matches[1]);
+        }
+
+        return trim($raw);
+    }
+
     /** @return array{title: string, description: string} */
     public function generate(Article $article, string $specsText = ''): array
     {
@@ -32,8 +41,9 @@ final class EbayTextAgent
         $condition = $article->getCondition()->value;
         $conditionNotes = $article->getConditionNotes() ?? '';
         $manufacturer = $article->getManufacturer() ?? '';
+        $modelName = $article->getModelName() ?? '';
         $modelNumber = $article->getModelNumber() ?? '';
-        $deviceLabel = trim("{$manufacturer} {$modelNumber}") ?: $typeName;
+        $deviceLabel = trim("{$manufacturer} {$modelName} {$modelNumber}") ?: $typeName;
 
         $specsSection = $attributeText !== ''
             ? "Known attributes:\n{$attributeText}"
@@ -54,8 +64,8 @@ final class EbayTextAgent
             'specsSection' => $specsSection,
         ]);
 
-        $title = trim($this->ollama->generate($this->model, $titlePrompt));
+        $title = $this->extractBetweenDelimiters($this->ollama->generate($this->model, $titlePrompt));
-        $description = trim($this->ollama->generate($this->model, $descriptionPrompt));
+        $description = $this->extractBetweenDelimiters($this->ollama->generate($this->model, $descriptionPrompt));
 
         if (mb_strlen($title) > 80) {
             $title = mb_substr($title, 0, 77).'...';