write_archive_rds() (and thus upload_package_index()) no longer errors when a slot has no archived versions yet — it returns an empty index instead. Fixes the Meta/archive.rds failure the first time a package lands in a fresh per-minor slot.
bincraft 4.2.0
process_cran_updates() gains r_minor_detection ("none"/"issue"/"classifier") and r_minor_sensitive_only, classifying each candidate via the ABI classifier and routing only risky packages to per-minor slots.
