{"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-vagn7q8f","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote25566701 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f62228069f1b8a428829d8a5f1d02cf218e5666696a17dd5c74f659c3f717c21","version":22},{"created_at":"2026-06-10T13:30:56Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(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":"ac446a444f5f8e9369e697299a46bd0394a42e7c298b7840584f21b8185d2dff","version":8},{"created_at":"2026-06-10T11:59:59Z","element_count":89,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"fee8152012d2d3b982dff7a23f9276488c1b1e329c2d7e97354fd1a3468074cc","version":3}]}