They mention "Why did we build it ourselves" in the part1 series: https://stripe.dev/blog/minions-stripes-one-shot-end-to-end-...

However, it is also light on material. I would also like to hear more technical details, they're probably intentionally secretive about it.

But I do, however, understand that building an agent that is highly optimized for your own codebase/process is possible. In fact, I am pretty sure many companies do that but it's not yet in the ether.

Otherwise, one of the most interesting bits from the article was

> Over 1,300 Stripe pull requests (up from 1,000 as of Part 1) merged each week are completely minion-produced, human-reviewed, but containing no human-written code.