# RetrieX p29 - Shop Result Dedupe Hardening

Purpose:
- Prevent repeated shop product records from being passed into prompts or rendered in fallback output.
- Treat product number as the strongest deduplication key, so SKU variants with slightly different display names do not appear repeatedly.
- Keep the existing shop ranking and technical suitability logic unchanged.

Changed files:
- `src/Commerce/ShopSearchService.php`
- `src/Agent/PromptBuilder.php`

Validation:
```bash
bin/console mto:agent:config:validate
bin/console mto:agent:regression:test
bin/console mto:agent:config:audit-source --details
bin/console mto:agent:config:audit-patterns --details
```