{"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-5s56i7jw","versions":[{"created_at":"2026-06-10T22:52:11Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote22578729 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"822cc6146ae51ae29fd9c246c16a3c205e53e00355d6ed6aec50cfae3cc53441","version":25},{"created_at":"2026-06-10T13:15:42Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(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":"a2478581aff8dc92a75ae448d130ad79ff6ffe7eb66c35485b313da23e66360e","version":10},{"created_at":"2026-06-10T09:37:41Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d1b5493dfe3afcdf06f75ceb9a87888662cba97b0d6bc1b3e5ddce4b76be598d","version":2}]}