Five new asserts (Lane E 67 -> 72; selftest 315 -> 320):
- price exists, sits between gnome and carport, keyed to the anchors'
collateral string, wreck carries the same bill and names its twin
- the torn gutter is DOWN in the wreck and UP in the intact house — negative
control run: rebuilt with the ground run at eave height, selftest went red
('gutter_down tops out at y=2.68', 1 failed / 319 passed) while the Blender
verify PASSed the same bad file (plan position unmoved, no box span changed);
restored build round-tripped to identical hashes
- wreck height equals house height (a house does not fall when its gutter does)
- no fascia_anchor_* survives into the wreck
- house pair added to the shared ground-plane test
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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