DailyOS

A personal productivity OS — notes, tasks, projects, calendar, habits, goals, analytics, study mode, focus timer, doodle canvas and a developer log. Eleven modules over 34 Prisma models in one schema, so a task can come out of a note and a habit can roll into a goal without an integration in between.

Notes carry three editing modes on one record: rich text, a sketch pad, and a freeform canvas you double-click to drop text onto. File bytes live in MongoDB GridFS rather than Postgres, so a large PDF isn't sitting in a row that gets read on every page load.

Next.js 16, Prisma, Neon, Auth.js v5. Vercel behind Cloudflare.

What I'd do differently

Eleven modules over one schema was the right idea. Thirty-four Prisma models before a single day of real use was not. Half of them changed once I actually lived in the app, and every change meant a migration. Next time: three modules, a month of daily use, then the schema.