4 commits, squashed; the originals stay reachable from tag archive/merge-main-develop. -f81c4b157jyviko: Chamfer history test: the chamfer after each box cut is exactly one face on the painted block too -9c0d6bd1fjyviko: Grid test: a pole side's face is the five triangles fanned from its one grid node, none degenerate -648413556jyviko: Kernel tests: the twelve ignored print-only debug tests and surveys go; coplanar_curved_booleans checks the flush-capped cylinder cuts and unions they printed -35805f899jyviko: Kernel: the #883 board fixture generator is an example, not an ignored test Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DtL5M41G8Nua7HvuFPZkmJ