The stepper reference PDF says the arc tolerance default is 0.05 while the code uses 0.5 mm; G61 and G64 are accepted by the code but missing from the supported codes list, and corner blending is not documented at all.
From the Grok pain-radar digest, Oct 25-26 2026 (Oct 25 daytime to Oct 26 morning slots). Verified live 2026-10-26: issue/PR read on GitHub; title and state confirmed.