{"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-w6jx8g9w","versions":[{"created_at":"2026-06-10T22:52:37Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20709667 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c4239b97fcb320471aa95ccb766376854a6ec550c499857552290b6343470ce3","version":18},{"created_at":"2026-06-10T14:13:24Z","element_count":72,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"de311793d4c80f96cf177c2aaf86202faec1217c8f23299683a043dbf4836ff2","version":7},{"created_at":"2026-06-10T13:47:56Z","element_count":44,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"4bfa02e094b4b4fa13d403a8d869ffa7e2113177adc15c461dfefcc12fd3ed66","version":4}]}