The AUTHOR_MAP dict in scripts/release.py was a merge-conflict magnet:
every concurrent salvage PR appended entries to the same lines of the
same file, so parallel PRs re-conflicted on every merge to main.
New system: one file per email under contributors/emails/ — filename is
the commit-author email, first non-comment line is the GitHub login.
File additions never conflict, so any number of PRs can add mappings
concurrently.
- scripts/release.py: AUTHOR_MAP is now LEGACY_AUTHOR_MAP (frozen)
merged with the directory at import time (directory wins). All
existing consumers (resolve_author, contributor_audit.py) unchanged.
- scripts/add_contributor.py: idempotent CLI to add a mapping; refuses
conflicting reassignments (incl. against the legacy map), validates
email/login shapes.
- contributor-check.yml: attribution gate now accepts a mapping file OR
a legacy entry; failure message prints the exact add_contributor
command. Also auto-resolves bare <login>@users.noreply.github.com
emails is intentionally NOT added (kept id+login form only, matching
previous behavior).
- contributor_audit.py: guidance now points at add_contributor.py.
- tests/scripts/test_contributor_map.py: 12 tests covering loader,
merge precedence, CLI idempotency/conflict/validation, subprocess E2E.
