/rename[name]

Renames the session and shows the name on the prompt bar; without a name, generates one from the conversation.

Best use

With many sessions open: /rename backtest so it stands out in /resume.

/clearStart a fresh conversation (the old one stays resumable)
/compactSummarize a long conversation to free space
/contextSee what is filling the context window
/planGet a plan first; edits wait for your approval
/resumeGo back to an earlier conversation
/rewindUndo: roll code and conversation back
/autocompactSets how full the context window gets before automatic compaction, e.g.
/branchCreates a branch of the conversation at this point and switches into it; the original is preserved and reachable via /resume.