{"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-6hr9upq9","versions":[{"created_at":"2026-06-15T06:08:53Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8cf7d11b7e8868b93588acb8cb2c106ce78503c56faf35cbb97cf2e7ea2631d5","version":3},{"created_at":"2026-06-15T06:04:34Z","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":"3a1132d7b8d99352ceecffa2a15bd00fc5058613dd4f77a9378a98fea00dcf65","version":2},{"created_at":"2026-06-15T06:04:34Z","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}]}