{"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-hpaphpsk","versions":[{"created_at":"2026-06-10T13:26:35Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"a9ab6f6ebea4ba12e69c76bf4b4591d1b2839b4780bdb183bd6f7de50c6b1bf1","version":9},{"created_at":"2026-06-10T11:26:47Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e91bd842572744c649c0b68e79e694b9af2a3e9ef243bcb7cefe8ecf61d57c3f","version":3}]}