As someone that's currently building accounting (and many many other) tools for myself: yes, it can.

But with a big fat asterisk that you: 1. Need to make it aware of all relevant business logic 2. Give it all necessary tools to iterate and debug and 3. Have significant experience with strengths and weaknesses of coding agents.

To be clear I'm talking about cli agents like Claude Code which IMO is apples and oranges vs ChatGPT (and even Cursor).