Building Mnemo: A Memory Layer My Agents and I Share

Every project I’ve written about this year produced the same kind of leftover: decisions. Why Tsundoku identifies series the way it does. Why Codex plugins talk over stdio. Why the third attempt at a library server used SQLite. Each took an evening of thinking, and each lived in exactly one place: whatever chat window I had open at the time. That’s the problem Mnemo solves. The line at the top of its PRD is: context is the most valuable thing you produce, and it currently lives nowhere. It’s spread across chat projects that don’t talk to each other, markdown files I forget I wrote, and notes apps that no agent can reach. ...

July 28, 2026 · 5 min · 890 words · Sylvain Cau