@core

Streaming AI chat with versioned prompts, tool calling and usage/cost logging; model set by env

Sessions + OAuth (GitHub, Google) with Drizzle, for Hono and Next.js

Stripe subscriptions: checkout, portal and idempotent webhooks with Drizzle

Postgres with Drizzle: shared client, per-module schemas, transactions and ULID ids

Transactional email with typed React Email templates: Resend, SMTP or console in dev