{"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-w18wu96m","versions":[{"created_at":"2026-06-10T13:26:40Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"49d31939f6559776e517590610b85dd579b032a88d2d350993061212397719fd","version":10},{"created_at":"2026-06-10T11:26:44Z","element_count":55,"note":"revert: GA design failed production houki (M5)","saved_by":"mcp","sha256":"2fff8fb4a4107537c40e80bbb2c928c2d634fdb775bc134e27b88bf6bfa7d069","version":4},{"created_at":"2026-06-10T11:26:44Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e8244239e0963851bf04d733f1cdcc66fc3b8c1359de12ccf65dcd2a33d265d4","version":3}]}