Function cli_entry 

pub fn cli_entry(args: impl IntoIterator<Item = OsString>) -> ExitCode

Run the rtk CLI with a caller-supplied argv and return its ExitCode.

args is a full argv: clap skips the first item as the program name, so hosts must pass a placeholder (e.g. "rtk") ahead of the real arguments — ["rtk", "git", "status"], not ["git", "status"].

Process exit

This dispatch is exec-like, not a pure function call: several paths terminate the process directly instead of returning. --help and --version exit after printing, parse errors on rtk meta-commands exit with clap’s error, and filters propagate a failing child command’s exit code via std::process::exit. Hosts must not rely on code running after this call (cleanup, atexit, destructors).