{"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-ud2z4s5r","versions":[{"created_at":"2026-06-13T17:39:02Z","element_count":72,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"2a84cdaaff762072bc7b072754703a17161da34b1a6f5f08b86dd53de3ffc0b0","version":3},{"created_at":"2026-06-13T17:24:18Z","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":"f59cfc13dbde61cb382f452c08886122795fbea29f95491f2615d716a21ba195","version":2},{"created_at":"2026-06-13T17:24:13Z","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}]}