This was done by hand by people like Footnoted. They received SEC filings using a key red flag word filter into a shared Gmail account with special attention for filings done on Friday night or ahead of the holidays.

I think using LLMs to ask a company about their company figures is missing the point. After all, XBRL already exists, and that data is widely accessible anyways. Where LLMs would add more value is analyzing changes in different sections of a company's filings, such as Risk Factors, MD&A, or governance filings.