{"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-jrkemh1j","versions":[{"created_at":"2026-06-27T19:37:15Z","element_count":72,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6d21c22e611e12fbc6bc7b149364aed3c8c595b36aa069ae8e9bf081799b08e9","version":3},{"created_at":"2026-06-27T19:23:58Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6597af38bc7027da59d5dcf84703793b5a34d9fabdad7a03b94d82ad4082e65e","version":2},{"created_at":"2026-06-27T19:23:58Z","element_count":130,"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}]}