{"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-house-rbwmnjvf","versions":[{"created_at":"2026-06-30T19:37:01Z","element_count":74,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"46d058efcb7cfd12165bbfa0a1850ec815bc1eff677e9608bb975f1759399ba4","version":3},{"created_at":"2026-06-30T19:26:18Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"85b915bfddc11dd03ff2b00a6676c3bb4031bc4606fe5d3a615436faa75ae1f9","version":2},{"created_at":"2026-06-30T19:26:18Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}