{"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-willowbrookhouse-id4addks","versions":[{"created_at":"2026-06-29T19:50:45Z","element_count":82,"note":"5軸GA polish 40->93 by M5 (autonomous)","saved_by":"mcp","sha256":"db160ab13c5b6fe6cd40a184f7dc7f86edf678a76a03327f6b7a15e14a6aff20","version":3},{"created_at":"2026-06-29T19:42:58Z","element_count":101,"note":"loop3: 設計時延床 78.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a2abf91b7bee74f5b81c119abc2d6bf6c497e444f5721cbdb4eba002287495bd","version":2},{"created_at":"2026-06-29T19:42:58Z","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}]}