{"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-jkonzbr5","versions":[{"created_at":"2026-06-10T13:09:48Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(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":"83c6ed2c655876fb95912b8f399c41c3fd08695e7c1136e3e8f38f85b0dda2fa","version":11},{"created_at":"2026-06-10T07:59:17Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2680df062bf4e4e3f3887e2c123e35312f4e17d1495485bedd04e82dfab30d46","version":2}]}