Safe meetup tracker for marketplace sellers and their families

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1. 1. Project Setup

   Build the weekend MVP of "SafeMeet": a meetup safety tracker for marketplace sellers. It lists verified safe-exchange spots and shares your live location with one trusted person until you tap I'm done.
   
   Stack: Expo (React Native) with TypeScript, Supabase (Auth with email magic link, Postgres, Realtime), Google Maps for the map, Twilio for SMS.
   
   Tables (Row Level Security on: the meetup owner and the invited contact only):
   - trusted_contacts(id, user_id, name, phone_e164)
   - spots(id, name, lat, lng, kind, verified_at, source_url) where kind is one of police_lot, municipal_safetrade, retail_verified
   - meetups(id, user_id, spot_id, contact_id, starts_at, ends_at, status) where status is one of live, closed
   - pings(meetup_id, lat, lng, recorded_at) with Realtime turned on
   
   Screens: spot list and map, start meetup, live meetup.
   Env vars (names only): SUPABASE_URL, SUPABASE_ANON_KEY, GOOGLE_MAPS_KEY, TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN, TWILIO_FROM_NUMBER.
   Permission copy: the location share lasts only for the meetup window.
   
   Do not build: billing or plans, an admin tool for adding spots (seed the spots table by hand), family or group tracking, tracking after the meetup ends.
   Done when: the app runs in Expo Go, you can sign in, and the four tables exist with Row Level Security on.

2. 2. Core Feature

   Build the one feature that proves SafeMeet: a time-boxed meetup with a live share and a timeout alert.
   1. Pick a verified spot from the list, set a duration (default 20 minutes, maximum 90) and pick one trusted contact.
   2. Starting writes meetups.status = live and starts a foreground location watcher that inserts a row into pings every 8 seconds.
   3. The contact's screen subscribes to that meetup's channel and shows the pings on a map.
   4. When ends_at passes and the status is still live, send the contact one SMS from a server function: the spot name, how old the last ping is, and a link to the live view.
   5. Tapping I'm done sets status = closed and stops the watcher. An emergency button dials the local emergency number and texts the contact.
   Rules: never show a spot as verified unless it has a source_url and a verified_at. Delete a meetup's pings 24 hours after it closes.
   Empty state: with no spots, show "No verified spots near you yet".
   Done when: a meetup you start shows live on a second device, and letting it run past its end time sends the SMS.

3. 3. Landing Page

   Build a one-page landing site for SafeMeet.
   Hero: "The meetup is five minutes. The worry lasts all afternoon." Sub: "Verified safe-exchange spots. Live share with one person you trust. An alert if it runs long. Not a family tracker." One button: Plan tonight's pickup, which joins the waitlist.
   Sections: the parking-lot problem, how it works in five short steps (pick a spot, start the window, timeout watch, emergency, end and forget), a map with police-lot pins, and a privacy FAQ (the share ends with the meetup).
   Waitlist: store the email in a waitlist table in Supabase. No other service.
   Voice: plain and calm, never alarmist.
   Done when: the page renders on a phone and a submitted email appears in the waitlist table.

4. 4. Branding Package

   Use a design or image tool for this one. A coding agent cannot draw a logo.
   Brand for SafeMeet, the safety tracker from Lokkit: a wordmark and an app icon that feel calm and trustworthy, not alarming.
   Colors: one deep green or blue, one warm light neutral, and one clear alert color used only for the emergency button.
   Typography: one readable sans for the interface.
   Deliverables: wordmark, app icon, a map pin set for the three spot kinds (police lot, municipal safe-trade zone, verified retail lot), and one launch graphic.
   Done when: each deliverable is saved in one folder and the three pin kinds are easy to tell apart at small size.