# Resources - [Promotions](https://docs.commercelayer.io/rules-engine/resources/promotions.md): How to set up promotions with the Rules Engine using order rules - [Price lists](https://docs.commercelayer.io/rules-engine/resources/price-lists.md): How to use the Rules Engine in conjunction with price lists and set up price rules --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.commercelayer.io/rules-engine/resources.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.