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Show HN: WonderTwin AI – Local API twins for safe agentic development

https://wondertwin.ai

Inspired by Simon Willison's recent post on dark software factories: https://simonwillison.net/2026/feb/7/software-factory/ , I started experimenting with the Digital Twin Universe concept for a fintech product I'm building. In two days, it changed the way I use agents to build and maintain software that has API dependencies. With traditional development, agents can't safely explore or...

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Re:Ask HN: Any good essays/books/advice about software sales? on Monday September 30, 2024 @06:29PM (#41702809)
Founding Sales is a great book for non sales people who need to learn sales for their own startup / business. Sounds like this is what you're after. Free to read, too. https://www.foundingsales.com/
Agents that make front end development easier go a long way to making bootstrapped entrepreneurship more accessible. Love that this is open source!
Have you tried just opening it in Cursor.sh and saying "make this a [language] project instead of PHP"? Curious about the results you'd get.
Congrats on the launch, Jorge and Julio! The fintech space is crying out for better, easier experiences that lead to better decisions, faster. Your UI demonstrates that you've thought through the domain to its primitives and is well-organized, so well done!

One of the big challenges is onboarding customers and their data. The integration toggles and menu item for data mappings are thoughtfully organized, but how much of it is self service?

I lead product for one of the leading US sales tax solutions, and have also built products automating EU VAT solutions. I came into these roles with little subject matter expertise, but with enthusiasm for making it easier for small businesses to thrive. So, take these inputs with that perspective, please.

VAT tax rate calculations are trivial, but filing returns is complex.

Sales tax calculations are complex, and so is filing returns. Also, the reseller tax exemptions are not easy (in fact, most tax audit fines come from poor records around tax exemption, not from collecting the wrong amount of tax). As someone operating a SaaS business in the US, I wish we had a VAT system.

It's also worth understanding that in many states, sales taxes are the primary way that local governments can directly generate revenues. To simplify the US tax system, we first need to solve how we equitably fund local governments.

LOLZ I was waiting for someone to call them out. I haven't looked at their interface in decades, but last time I looked it was decades out of date. Payments is the most profitable niche in the porn industry.
Re:John Peel Sessions on Monday May 11, 2020 @07:23PM (#23148533)
Strange Fruit put out so much quality music
Re:John Peel Sessions on Monday May 11, 2020 @07:15PM (#23148448)
Peel Sessions were the best way for me to discover new music when I was younger. Still have Inspiral Carpets and Buzzcocks originals on vinyl.
Re:Movies you should own: The Andromeda Strain on Wednesday April 01, 2020 @01:05PM (#22750968)
I watched The Quiet Earth in a theater when it first came out. Great flic! Thanks for reminding me to watch again