{"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-px8h66mf","versions":[{"created_at":"2026-06-13T14:35:09Z","element_count":90,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"a9b46b053c137bb263cebb5b69ebb1749e9ed43b82f40cea2b68cf9fbeb0f5d2","version":3},{"created_at":"2026-06-13T14:29:54Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ed25ba7cfb10551a44db4a8fa5f21fad5fa5c581bbc30dd479b17fc43eafbba4","version":2},{"created_at":"2026-06-13T14:29:53Z","element_count":107,"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}]}