SarvStack - the agent-ready SaaS starter

What it does

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).

TanStack Start + Supabase (RLS) + Polar (MoR, VAT handled) SaaS starter with AI, admin, entitlements, i18n and CLAUDE.md conventions. Ship in a weekend.

VAT handled, ship in a weekend. Auth, billing, database patterns, and the CLAUDE.md conventions your coding agent needs — all in one repo. 1 // src/routes/api/webhooks/polar.ts 2 const rawBody = await request. text (); 3 const ok = await verifyStandardWebhook ({ 4 id: request.headers. get ("webhook-id")!, 5 timestamp: request.headers. get ("webhook-timestamp")!, 6 signatureHeader: request.headers. get ("webhook-signature")!, 7 body: rawBody, 8 secret: process.env.POLAR_WEBHOOK_SECRET!, 9 }); 10 if (!ok) return new Response ("Invalid signature", { status: 401 }); 11 12 const event = JSON. parse (rawBody) as PolarEvent; 13 if ( shouldRunPaidEffects (event)) { 14 await deliverEmail (…from sarvstack.sarvon.ch

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