Every AI agent hits the same wall: context overflow.

You start a conversation. The agent remembers everything. You ask 50 questions. It still remembers. Then at message 101, it forgets message 1. At message 200, it can’t recall what you discussed an hour ago.

The context window ran out.

Most systems treat this as a UI problem: “Start a new chat!” But for autonomous agents—ones that run for days, weeks, months—this isn’t acceptable. They need continuity across sessions, not just within them.