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- fillLoaded's doc listed what it does and omitted the non-finite-region rejection this PR added to it. - Trim the half-spacing rule's restatement in DESIGN.md to the decision and a pointer. The rule, the square-foot arithmetic and the failure mode are written out once, in hexCenters, rather than near-verbatim in four places. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ