petricor

The problem

Consumer groups buy together from small farmers, but they run on volunteer effort: spreadsheets, WhatsApp threads, and someone balancing the books every week. When that person burns out, the group struggles. Petricor started as the tool for a real pilot group and takes that work off the volunteers.

What I built

• Channels per farmer, with group orders that open and close on a schedule.
• Member orders, pickups, and issues, with AI help to resolve them.
• Balances and transactions in integer cents, so the books always add up.
• In-app and email notifications, plus an admin panel.

Decisions that mattered

• Accessible for older members by default: large text, large buttons, one clear action per screen.
• Every change to money leaves a record. Nobody has to trust anybody to know what they owe.
• Automate before adding options: reminders, closing orders, and summaries for the farmer.

Stack

• TanStack Start
• Convex
• Better Auth
• Resend
• Tailwind CSS

See it live

• Website