Give Claude a Memory That Survives the Chat Window

Claude starts every conversation from zero. That is not a bug, it is how the context window works, and it is why you keep re-pasting the same background before you can ask the real question. You pay for those tokens every single time.

This guide sets up a wrap up skill. At the end of a working session Claude writes a structured summary of what happened, and that summary goes into a NotebookLM notebook you keep forever. Next session, instead of re-pasting your whole history, Claude reads back only the part it needs.

One honest note before you start, because it changes how you set this up. NotebookLM has no public write API. Nothing can push a file into a notebook for you automatically. What the skill does is produce a clean, well shaped file in a folder you control. Getting that folder into NotebookLM is a one time setup, and after that it is either automatic through Google Drive or a five second upload. Anyone telling you otherwise has not tried it.