efa9e89468cbab702c86fcbe451c8836167ae83a
SurfaceWorld, FloatingIslands and legacy evaluators sit behind one immutable densityAt adapter held in a variant (no virtual call per sample); BindResolvedStratumFields builds a sorted strate table at world setup, so DensityAt, native SW/FI sampling and ClassifyBoxDetailed no longer ask the strate manager per sample. No arithmetic change: owner hashes identical to L37/L39 at W1/W12. Cost vs L39: FI -0.66%, SW -1.31% (noise). verify fast/medium/full PASS (full re-run alone: 407 gates). Research R7: disk cache design for UE5/Windows/multiplayer and a zlib probe (about 1/3 size, 0.1 ms/tile). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1
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