In Letopis, sign-in is not just email+password. The product lives between the web and Telegram, so a person needs one account and several honest ways to prove access.
Letopis has a face now — a public landing page, multilingual and live, already in production. Built in a couple of days: the designer handed off a prototype, then Claude Code did the hands-on work while I played editor and architect. What's inside, how it was built, and why it's still just a face.
I'm a MongoDB fan, and in production Letopis runs on Postgres. How I chose a database for an AI project: jurisdiction before the price list, leaky free tiers, and a graph search that pushed me to pgvector and recursive CTEs. With numbers and honest caveats.
What hid behind the «Unknown» card: a note system that remembers everything — finances, nutrition, habits, agents in Telegram and on the web. Plus a poll: help pick the name.