forked from 1b-agent/fieldcraft-upstream
RegionSize is the exact graded field the structured meshers query; the tetrahedral refinement bakes the same local sizes into its graded background grid. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo