{"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-oz19yppi","versions":[{"created_at":"2026-06-10T22:52:26Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote23725686 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"adfc831b453d5405285e5ab3ff70593f41246db7ff818b95806a92e39260d760","version":21},{"created_at":"2026-06-10T13:31:53Z","element_count":65,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(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":"1cd2c6ac3ec98a4bd498d9d25d56b0ec54dbe724be14cb5573c522299a5ed277","version":7},{"created_at":"2026-06-10T12:16:01Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"db8f4039fd9edb4591c352f7606c4cec36c107dbd43f39013c92c492af30da34","version":3}]}