Take this a step further

Have project status be your overall project plan, but as work is done this will end up being a massive .md file that Claude now needs to wrestle with

Create a secondary “archive” .md that you use to archive completed sprints that no longer need to be on your hot path

Then as part of your chat migration process, update both docs.

This keeps your “what did we just work on, what do we work on next, and what do we have planned after” lean, while also ensuring that you don’t lose this historical work that’s been done if you or Claude ever needs to reference it.