{"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-vertexedgecottage-0pa19g90","versions":[{"created_at":"2026-06-24T08:46:25Z","element_count":88,"note":"5軸GA polish 38->91 by M5 (autonomous)","saved_by":"mcp","sha256":"a8612c0e795e3398fac317bdfdbd1f9c2ffefa52fdc6a6897e3fa0a53ada3863","version":3},{"created_at":"2026-06-24T08:38:28Z","element_count":101,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"64544c515d7a57a22845234e5a061241b1402165b989fd413639b66ca08b9430","version":2},{"created_at":"2026-06-24T08:38:27Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}