I've been building with AI coding tools for about two years and kept hitting the same problem: every session starts fresh. You explain your project, build something, close the laptop, then do it all again tomorrow.
Tried fixing it with better prompts. Didn't help. The issue was organizational, not instructional.
So I made three folders: context (reference files), plans (numbered prompts for multi-session work), and messages (agent coordination). No plugins, no infra, just markdown files.
It's simple but it changed how much I actually ship. Open sourced it in case others have the same problem.