{"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-cxkqu6a8","versions":[{"created_at":"2026-06-10T22:53:31Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy53236569→quote21081401 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"52306f5d5fdceb6a5b142f11db8abed2082fd4cce2aeb424f92258e7faa162d7","version":10},{"created_at":"2026-06-10T16:55:08Z","element_count":85,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"681d2e9077038158ca27ed64116facfcc71e13ee8055b47c1943fdfab29d169c","version":2}]}