There’s a moment every developer hits when “AI-assisted coding” starts feeling less like acceleration and more like friction. For me, that moment came somewhere between deleting yet another useEffect -based data fetch and watching Cursor confidently generate a tailwind.config.js file in a project that absolutely did not need one. That loop kept repeating: Wrong patterns Outdated APIs Defaults that no longer reflect how modern apps are built And the more cutting-edge the stack became— Next.js 16, React 19, Tailwind v4 —the worse it got. So I stopped fixing the symptoms and built my own rules pack instead. Afterwards, I wanted to have some place that I could centralize it and future digital products and tools. That place became Saastenance —and this post is both a technical deep dive and the story of how a small dev tool quietly turned into a full digital product and part of a brand.…