# CallerIdentity.sessionID

- **Module:** CallerIdentity
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-swift/blob/f02a4668570e1cc5198c941413750e021f42c214/Sources/LibTmuxMCP/Caller.swift#L13
- **Page:** https://libtmux.org/reference/swift/calleridentity-sessionid/

From `TMUX`, in the same `$…` spelling as a session id.