A builds world.js FROM DATA this sprint, and a site's `wind` block (venturi
funnels, later per-site shelter overrides) is hand-authored data like a storm —
so it validates like one. setVenturi already clamps defensively, but a clamp
hides a typo where the repo's ethos is to name it: a gain < 1 (someone reaching
for a shelter), a funnel with no throat coordinates, an axis typed "south". A
calls this at site load next to validateStorm. A site with no wind block, an
empty block, or an empty venturi list all validate — the funnel is opt-in.
Node 56/0/0.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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