Hi @sl11,
Sorry about this. Chat history is stored locally on your machine, and when Cursor crashes or freezes before the session index is fully written, the sidebar can lose track of your conversations even though the data is still on disk.
Your chat transcripts are likely still saved here:
~/.cursor/projects/<your-workspace-path>/agent-transcripts/
Could you check that folder and let us know if you see .jsonl files in there? If the files are present, the conversations aren’t lost, just not being picked up by the sidebar.
This is a known issue that our team is actively investigating. You may also find this related thread helpful: Chat history missing but local state and transcripts present