I would like to introduce the addition of Retrieval-Augmented Generation (RAG) to MindMac. RAG combines the power of language modeling with dynamic retrieval of information from external sources, which can result in answers that are richer and more relevant to specific user queries. This functionality would make MindMac even more powerful and versatile, especially for complex or domain-specific queries. I believe this addition would provide significant value to all users of MindMac.