SarvStack - the agent-ready SaaS starter: TanStack Start SaaS kit — VAT handled, built for AI agents

Most SaaS starters are Next.js, ship raw Stripe, and predate AI-assisted coding. SarvStack fixes all three: built for TanStack Start, Polar merchant-of-record billing (EU/UK VAT handled), and agent-ready docs — CLAUDE.md, Cursor rules and slash commands that teach AI agents your conventions. Plus documented RLS patterns, teams, API keys, notifications, audit log, AI quotas, trilingual UI. The site itself runs on the kit. $99 one-time (soon $149).

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!