{"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-5bqond9s","versions":[{"created_at":"2026-06-10T22:49:05Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote19841009 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5191ec069386f67e2cb12731f199321cbf55edc6be542d733666b2cc23322ff7","version":25},{"created_at":"2026-06-10T13:07:16Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.3㎡(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":"6c21ddd163d179c20d15f8feb9f4d9decd06fbd1fb73ba078212aa8519a3ab46","version":11},{"created_at":"2026-06-10T07:25:32Z","element_count":89,"note":"5軸GA polish 52->98 by M5 (autonomous)","saved_by":"mcp","sha256":"6ee6425b5a228134eef6921f3f69567bada622fd3efcb9d6ed053f7fdd2f93af","version":2}]}