fix(local): route multi-signature packages to human triage in the proposer #119
2026-07-14
fix(local): route multi-signature packages to human triage in the proposer
A package whose failing builds match more than one auto-proposable signature (e.g. some logs hit `tbb-stddef-removed` and others `rcppparallel-bundled-tbb`) produced two candidate registry entries with the same package/platforms/versions key, so the candidate set failed `validate-patches.R` with "ambiguous duplicate entries" and the whole proposer run aborted. Add a pure `dedupe_candidates()` that keeps a package only when it maps to a single signature and routes genuinely ambiguous packages (conflicting fix tiers) to human triage instead of guessing between them. The proposer prints the skipped packages and proceeds with the unambiguous candidates.