{"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-willowbrookhouse-jdzm4cn4","versions":[{"created_at":"2026-07-03T08:09:51Z","element_count":84,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"ee707be9c022d5fb13dd622080e6e5aea58e7c30bad51a3e8604dbd0fcf4b0dc","version":3},{"created_at":"2026-07-03T08:07:14Z","element_count":82,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c938cddd768490adeb9f6ad395c8056bcdb2eb9c64d30893fcd47c037f2cac8c","version":2},{"created_at":"2026-07-03T08:07:14Z","element_count":82,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}