... frontend + backend never drift - LLMs: OpenAI (GPT-5-nano for cheap structured calls, heavier models for big prompts) with Claude Haiku as fallback. All prompts and traces in Langfuse - Auto-apply: I tested some apis like skyvern , browser use. Ended up building my own - Hosting: Render (web, celery workers, celery beat, static frontend) Auth, billing, perms what you asked about: - Auth: Supabase magic links. Free tier is generous and I haven't outgrown it. - Permissions / authorization: almost 100% Postgres ... ... user_id', auth.uid()) policies give me per-user access control without writing any middleware. Massively less code than rolling my own perms layer. Worth the Supabase lock-in IMO. - Billing: not live yet.nmostly a Stripe Checkout wiring job. Observability ended

... Have you noticed "end-to-end