claude -r

The claude -r command (short for --resume) allows you to restart a specific past conversation by providing its unique Session ID. Unlike the -c flag, which automatically opens the very last session you had, -r gives you the precision to jump back to any session from your history, ensuring you can continue a specific line of work without losing context or previous tool outputs. If you run the command without an ID—simply typing claude --resume —it opens an interactive session picker where you can scroll through a list of recent conversations, see their titles, and choose the one you want to reactivate.