{"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-1s134vvw","versions":[{"created_at":"2026-06-10T22:52:21Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22514261 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"55c7f519d8b0b870eab1b093f420fee7f885d89372a2e17ed2f93a0c4aa4507a","version":25},{"created_at":"2026-06-10T13:25:37Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積92.5㎡(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":"4907649b8e71ca54c88c8a0671cc1c13cf6bd00a104bc417833cccafd52187e1","version":11},{"created_at":"2026-06-10T11:09:43Z","element_count":73,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"036eeab31992d0953aa7750afc4a31c65b61e8235dd819e33cf37ea446e76326","version":4}]}