SarvStack: The agent-ready SaaS starter for TanStack Start

Hi Product Hunt! I built SarvStack because every SaaS kit I tried had the same three gaps: they're all Next.js (TanStack Start deserves a great starter), they ship raw Stripe (leaving EU/UK VAT compliance to you — Polar as merchant of record fixes that), and none are written for the way we code now: with AI agents. SarvStack ships a CLAUDE.md that teaches Claude Code/Cursor the project's conventions, so generated code lands right the first time. Early adopter price is $99 (goes to $149). Honest scope note: it's built for solo indie hackers — no multi-tenancy, no teams. The site itself runs on the kit, so the auth and checkout you see are the live demo. Questions and critical takes welcome!