Yes, the LLM will have to write a script to process them, just wonder how it differs from other LLMs to categorize and create useful insights. I tried this with Opus and Actual, and Opus didn't label a lot of transactions where the payee's name includes gasstation, food and other obvious purchases.

Just to be clear, are you saying that he should generate via an LLM, or hand-write, a python script, then run analysis on the data?

Um sure, point being llm writes said script