This is super cool, and fully agreed that dark patterns / performance issues in TurboTax are frustrating. That said, I'm probably not ready to delegate something that sensitive to AI.
What I'd love to see here is if you actually do use TurboTax, how does your final tax return differ from the vibe-coded one?
While I didn't replace a tax application, I did use Claude to help with my taxes and it went really well.
Claude also turned me onto FreeTaxUSA, which ended up costing me $0.