Hey! 👋 I recently shipped ailineart.com, an AI line art generator that turns photos and text prompts into clean line art (sketch, pencil, woodcut, watercolor styles). It's a solo-built, bootstrapped SaaS with a free tier and paid subscriptions.
Plenty of posts cover "I picked Next.js and it was great." I want to cover the three things that actually decided whether this product would work or fall over:
Running long AI jobs without blocking web requests
Credit accounting that can't be cheated or double-charged
Stripe webhooks that survive retries and outages
