{"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-zojcz3td","versions":[{"created_at":"2026-06-15T06:20:56Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"577c6678081f5d658d24b1f258b004bbef70348fa79c9e904b3cc03a224b5ba1","version":3},{"created_at":"2026-06-15T06:07:20Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4dbfcfad809ebec2ad4a3b8ac0373677d574cad385d865b46aa06fcc979ae9e8","version":2},{"created_at":"2026-06-15T06:07:20Z","element_count":126,"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}]}