They want a git merge driver for .kicad_sch, .kicad_pcb and .kicad_sym because a person and an agent, or two agents, editing one design in parallel branches get Git line merges that interleave S-expression elements or leave a list unclosed so the file no longer loads; the proposed fix is a 3-way merge keyed by each element's uuid.
From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.