feat(abi): backfill classifier verdicts for pre-per-minor packages #199
2026-09-04
feat(abi): backfill classifier verdicts for pre-per-minor packages
bincraft now unions the ABI classifier cache into its risky-package set, but the cache only holds verdicts for packages that passed through the build pipeline after the per-minor scheme existed. Everything older has no verdict, and no verdict means the flat binary is carried into every per-minor index. That is the population the fix has to reach: a base64enc built under R 4.4.3 was served to R 4.6 clients, which have no SETLENGTH to bind. The verdict is computed from the package source, so it is independent of OS, arch and R minor: one run populates the cache for every slot. Only NeedsCompilation=yes packages are classified. A package with no compiled code has no symbols to bind and cannot fail this way, which cuts the work from 23218 packages to 4585 on amd64/resolute. This change will: - add local/backfill-abi-classification.R, enumerating a slot's flat index and classifying each compiled package through bincraft's cached classifier - add a manual .crow workflow to run it - stay resumable, since cached verdicts return without touching the network, so a re-run only downloads what is still unclassified