Nust yesterday I built a reconciliation helper for my budget. Claud Sonnet 4.5 is a beast. It got my iterative instructions and built a tool that pinpoints me the issues. Fast, beautiful, complete.

That's what LLMs are for. TOOL BUILDERS

What you are talking about is called financial operations.

And yes , automating that , very valuable.

Really you want an AI interface to a rules engine / system.

Embed with some companies finops teams if you can. Especially the software engineers who are in finops.