KiCad accepts a broken .kicad_dru rule file silently, DRC says Found 0 violations and exits 0 even with --exit-code-violations, and the JSON report has no field saying the rules loaded.
From the Grok pain-radar digests, Oct 27-28 2026 (Oct 27 8:41 AM ET through Oct 28 7:41 AM ET digests plus the Haitch editions). Verified live 2026-10-28: issue/PR/thread read; title and state confirmed.