{"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-8l4xxvm1","versions":[{"created_at":"2026-06-20T06:25:50Z","element_count":83,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"cff48630fe8a1d95ef66345b613b6eaf5ed11dc656ffc9fdf7bcf4f6960bd4a4","version":3},{"created_at":"2026-06-20T06:12:06Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"78fc8d2d0db6946ecd6680e9d906f6ba0365eba309fe9cfe5245cb565d05a73c","version":2},{"created_at":"2026-06-20T06:12:04Z","element_count":90,"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}]}