Format and tidy enforce only on lines changed in PRs (diff-only via
git-clang-format and clang-tidy-diff.py) — existing files keep their
current style until edited. Mass reformat deferred; .git-blame-ignore-revs
stub is in place for whenever that happens.
Sanitizer lane builds with -fsanitize=address,undefined and runs the
unit suite. continue-on-error: true initially so we can triage findings
without blocking PRs. UB categories pervasive in the Hash9 C cascade
(alignment, signed-integer-overflow, vptr) are suppressed pending
file-by-file fixes.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
