Fork of the Sol research session with the owner's answers (player-only 1 s collision; bounded
digging but fast crater spells). AVX2 integer kernel 4.25-5.86x over its scalar reference with
exact parity; radius-10 m crater = 714 bricks, cached-field edit < 1 ms (render not measured).
Cost estimate revised to 6-12 engineer-months; kill test gate <= 0.35 s worker wall on real plans.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ
