From an external agent run (2026-06-11, robot-hand task): the agent asked for hinge pin holes and ended up with decorative top bosses — the geometry passed every gate but did not express the mechanical intent.
Ask: a higher-level mechanical primitive library so intent maps to correct geometry directly:
hingeJoint() — knuckle + pin bore pair, aligned axespinHole(axis, diameter) — through-bore along an explicit axisclearanceHole('M3') — standard fastener clearance sizesservoMount(type) — common servo bolt patternsbearingPocket(size) — bearing seat with fit tolerance
These compose with the existing assembly/mates layer and are the natural surface for the kinematic feasibility gates.
From an external agent run (2026-06-11, robot-hand task): the agent asked for hinge pin holes and ended up with decorative top bosses — the geometry passed every gate but did not express the mechanical intent.
Ask: a higher-level mechanical primitive library so intent maps to correct geometry directly:
hingeJoint()— knuckle + pin bore pair, aligned axespinHole(axis, diameter)— through-bore along an explicit axisclearanceHole('M3')— standard fastener clearance sizesservoMount(type)— common servo bolt patternsbearingPocket(size)— bearing seat with fit toleranceThese compose with the existing assembly/mates layer and are the natural surface for the kinematic feasibility gates.