{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-riversidelodgehouse-297iuprq","versions":[{"created_at":"2026-06-11T04:23:27Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ea4b93aeb5dacb4880b5f1c7d58679e149cc2702ea149966d3333430623c2117","version":3},{"created_at":"2026-06-11T04:07:52Z","element_count":98,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f55f53a00b30c7fb6ad388617fd053f3210d352ad95fff144daa65facb81a9eb","version":2}]}