The cage is authored and committed, not derived from a field; the cage primitive's
distance serves measurement only (no cheap bound); detail is cut and split booleans on
the evaluated mesh with the operator's weld rule; panel lines are splits; SDF
composition and cage generators are research scored against the hand cage.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The ends of the brush-tree campaign: OpenSCAD-shaped CSG trees authored
in Blender through brokkr-ctl, with the typed brush tree as the one truth.
Sixteen invariants, scope, canonical implementations, evidence, and the
identity/lifecycle/authority table. No cut plan.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
