Function check_git_version 

pub fn check_git_version(
    context: &GitContext,
) -> Result<(u64, u64, u64), String>

What: Require a supported Git, asking at most once per process. Why: The check costs a Git process, so later dependent steps reuse the answer.

In TS you’d write (pseudocode):

await requireSupportedGit({ gitPath });