{"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-ii3fq8tk","versions":[{"created_at":"2026-06-13T16:16:24Z","element_count":90,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"62f881496565a07d3aa989529823a7e26609347d76fa26d0bfc2a5358a34947b","version":3},{"created_at":"2026-06-13T16:03:57Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"efe8ee1e10faa0f3a23ce363e23d55f7e0352c5840d8c464d81b80d4bf0ad682","version":2},{"created_at":"2026-06-13T16:03:54Z","element_count":86,"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}]}