Tell HN: If your idea is worth stealing, AI makes it easy. NDA or not

We're a small team. >7 years of R&D, self-funded, friends-and-family money. We solved a hard problem in a way that experts told us couldn't work. Non-obvious architecture - dozens of design decisions that only make sense once you've tried all the alternatives that don't. We got it working. Signed paying customers. Started building a real business. Another large company approached us for an evaluation. NDA signed. Over an extended period we shared everything - architecture, internals, custom builds, APIs. We thought we were closing the deal that would take us to the next level.