{"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-6h380no0","versions":[{"created_at":"2026-06-10T22:52:27Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote19626413 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"53dc99536eddc40c207175df1f2f38d611ae5e1616db3030caa45c14d09765a9","version":21},{"created_at":"2026-06-10T13:32:47Z","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":"fda8e0844e872ee07a1763d9bb656605fd2752f99a1b6786c582806b2ca1ef71","version":7},{"created_at":"2026-06-10T12:16:03Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"61778613027b25a234498f41b6548d9918afebd05f66fb14bd1d3b26f2c9a764","version":3}]}