Honestly
The smallest system that works.
It needs any capable AI assistant, the ability to save ordinary text files, and a few minutes at the start and end of each working session. No coding skill, no particular operating system, no specific subscription.
It doesn't give AI permanent memory, remove context limits or run by itself. It's a manual discipline that templates and prompts make cheap. A few minutes of closing ritual per session buys you the ability to resume from any blank session, on any model, at any time.
