{"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-tkwvy8zv","versions":[{"created_at":"2026-06-19T06:16:52Z","element_count":73,"note":"5軸GA polish 45->93 by M5 (autonomous)","saved_by":"mcp","sha256":"bbce8b46d5bf89f13ab7afb61eeb69e739211b59eb360134a8bbc568c4a12d9f","version":3},{"created_at":"2026-06-19T06:02:54Z","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":"6398b7294cb63eb6a9cf330490bef30a14b38a60331a9dc477d73bda6259a64f","version":2},{"created_at":"2026-06-19T06:02:51Z","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}]}