Sheffield/Harbor House drafting exposed two gaps: the template let a
historical stratum be anchored by a single celebrated/architect-authored
building (Park Hill) instead of a genuine building culture, and let
modern structural materials (reinforced concrete) into the vocabulary
without requiring a structural-necessity justification. Tightens the
HISTORICAL_STRATA placeholder guidance, the vocabulary/negative-constraint
instructions, and the Appendix instruction to close both gaps.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Bruno Postle
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