What do you think a memory system even is? Would you call writing things down on a piece of paper a memory system? Because it is. Claude Code stores some of its memory in someway and digests it, and that is enough to be called a memory system. It could be intermediary strings of context that it keeps around, we may not know the internals.

I think a memory system is when it automatically remembers and forgets things in a smart way.

I'm using CC right now and I see this: "Tip: Want Claude to remember something? Hit # to add preferences, tools, and instructions to Claude's memory"

The “memory” is literally just CLAUDE.md in the project directory or the main file