{"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-i3nzinim","versions":[{"created_at":"2026-07-13T09:38:57Z","element_count":84,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"cae38e4df3ce4514b1c058fbc3f606bdc88a4c46d79ade3ee080dbd300b600ed","version":3},{"created_at":"2026-07-13T09:33:50Z","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":"4576164cd19bad3e71dd9e54269e3dd2e40b4f5542e61bd87ccc6285792196a0","version":2},{"created_at":"2026-07-13T09:33:50Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}