# CallerIdentity.serverProcessID

- **Module:** CallerIdentity
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-swift/blob/f02a4668570e1cc5198c941413750e021f42c214/Sources/LibTmuxMCP/Caller.swift#L19
- **Page:** https://libtmux.org/reference/swift/calleridentity-serverprocessid/

The surrounding server's process id. This, rather than the socket path, is what identifies a server: a daemon that died and was replaced binds the same path, and comparing paths would then call the replacement "ours" and refuse to touch panes that only reuse an id.