Function run_guarded_child 

pub fn run_guarded_child(
    command: &mut Command,
    release: &mut dyn ReleaseSteps,
) -> Result<i32, String>

What: Run a Git child under the signal guard, release what it held, and report its exit code. Why: Release runs even when the child fails to run, and each failure is reported, not hidden.

In TS you’d write (pseudocode):

const guard = installSignalGuard(); const outcome = await run(child); await release(); guard.drop(); exit(exitCode(outcome));