Sorry, this still makes no sense. LLMs don't care about files. The way most codings systems work is that they simply provide the whole file to the LLM rather than a subset of it. That's just a choice in how you implemented your RAG search system and database. In this case the "record" is big, a file. No doubt that works for code, but it's nonsensical outside that.

E.g. for wikipedia the logical unit would likely be an article. For a book, maybe it's a chapter, or maybe it's a paragraph. You need to design the system around your content and feed the LLM an appropriate logically related set of data.