SMS AI Coaching Bot — Twilio, Node.js, Supabase (Full Spec Provided)

I'm hiring a developer to build a fully-specified SMS product: subscribers exchange 3-5 short daily text messages with an AI accountability coach (morning task commitment, timed nudges, evening verification, Sunday recap). This is not a discovery project — you'll receive a complete 15-page technical spec covering the database schema, six scripted message sequences with final AI prompt copy, error handling, SMS compliance requirements, and an 18-point acceptance checklist that defines "done." Required stack (please don't quote alternatives): Twilio two-way SMS with STOP/HELP and A2P 10DLC compliance, Supabase/Postgres, Node.js on Railway, OpenRouter for LLM calls with static fallbacks on failure, Stripe webhook intake, and a simple read-only admin dashboard. The core technical challenge is timezone-correct per-subscriber scheduling plus a sequence state machine driven by LLM-parsed inbound replies. Fixed price, milestone-based, targeting 2-3 weeks. Shortlisted candidates receive the full spec before final bidding.