crank-slider PASS

Offset crank-slider from sources/crank-slider-spec.md (authoritative, text only): four separate solids in stacked 5 mm layers, a ground plate (z -5..0), a 30 mm crank and a 30 x 16 x 5 slider block (z 0..5) and a 100 mm connecting rod (z 5..10). Three revolute pins (O ground to crank, the motor; A crank to rod; B rod to slider) and a prismatic guide along +x on the line y = 10 (ground to slider) f

clip play ground (modelled) crank (modelled) rod (modelled) slider (modelled)

gates

[A] parts_pass	PASS
[A] bom_complete	PASS
[A] joint_fidelity	PASS
[A] clearances	PASS
[A] motion_clear	PASS
[A] fluid_domain	n/a
[B] export_agreement	PASS
[B] performance	PASS
[B] conservation	n/a
[B] refinement	n/a
[C] source_hygiene	PASS
[C] boundaries_complete	n/a
[C] provenance	PASS
[C] evidence_separation	PASS

observables

id	status	value ± u_numerical	mesh-resolved	case
sliderTravel	ok	mm	-
stroke	ok	60.332 mm	-

A value its mesh ladder does not resolve is not evidence of performance; report.md gives each prediction's validation basis.