Function package_baseline_statuses 

pub fn package_baseline_statuses(
    scopes: &[PackageChangeScope],
    root: &Path,
) -> Vec<PackageBaselineStatus>

Engine-owned change scope of one run: a global changed-file set or the per-workspace Git baselines of workspaces.changedSince. Project-relative package baseline rows, sorted by workspace root.

An editor that analyzes several project roots passes every applied scope and its own root, so the rows of all projects share one path base.