# RetrieX Patch 9.0a - PromptBuilder basis YAML-only

This patch converts only the simple PromptBuilder basis, budget and shop-result limit values to required YAML configuration access.

Changed file:

- `src/Config/PromptBuilderConfig.php`

Converted to required YAML-only access:

- `budget.chars_per_token`
- `budget.history_padding_chars`
- `budget.output_reserve_ratio`
- `budget.output_reserve_min_tokens`
- `budget.output_reserve_max_tokens`
- `budget.safety_reserve_ratio`
- `budget.safety_reserve_min_tokens`
- `budget.safety_reserve_max_tokens`
- `budget.min_prompt_budget_tokens`
- `shop_results.max_results_in_prompt`
- `shop_results.detailed_max_count`
- `technical_product_keyword_match_threshold`

No prompt wording rules, fact-grounding rules, retrieval logic, shop logic, AgentRunner logic, or SSE/frontend code is changed.

After applying, run:

```bash
php bin/console cache:clear
php bin/console mto:agent:config:validate
php bin/console mto:agent:config:audit-source --details
php bin/console mto:agent:regression:test
```