Function run_cli_from 

pub fn run_cli_from<T, I, D, M, F>(
    spec: &'static ToolSpec,
    env: &ProcessEnv,
    argv: I,
    doctor: &D,
    metadata_command: M,
    run: F,
) -> i32
where
    T: CommandFactory + FromArgMatches,
    I: IntoIterator,
    I::Item: Into<OsString> + Clone,
    D: DoctorChecks,
    M: FnOnce(&T) -> Option<StandardCommand>,
    F: FnOnce(T) -> Result<i32, FatalCliError>,

Parse CLI arguments from a caller-provided argv, route shared metadata commands, and run the domain handler.

env carries the process-edge environment reads (agent tokens, HOME) performed in the binary’s main (REPO_INVARIANTS.md #5).