{"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-qdtq6lae","versions":[{"created_at":"2026-06-10T13:13:06Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"4586314634af48af1b4417fdd8b8c46463a4edb85dc6485214051e718147e5bf","version":10},{"created_at":"2026-06-10T08:48:56Z","element_count":70,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a6a6002d07a5cdf5f0f3b83155f56511b0d746d370d5aa1a762f848a153b1c26","version":2}]}