Claude Code sessions on this machine

Answers "which session is this, what else is running, and what do I call it".

The registry

Claude Code writes one file per live session:

<config>/sessions/<pid>.json

where <config> is $env:CLAUDE_CONFIG_DIR if set, otherwise ~/.claude. Each file holds the session's friendly name, sessionId, cwd, kind, pid, startedAt and version.

This is the only place the name is joined to the id. Nothing else exposes both: