Agent Memory: Remembering and Forgetting on Purpose

Why LLMs forget everything, the three horizons of agent memory, files as the simplest honest store, the ways memory becomes a bug — stale facts, poisoning, privacy — and why forgetting is a feature.

Content current as of 2026-09.

Lessons

1. The three horizons of memory
2. Files: the simplest honest memory
3. When memory is a bug
4. Forgetting as a feature
5. Myths, facts, and what to keep