{"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-mu0fp2lr","versions":[{"created_at":"2026-06-10T22:49:48Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20969375 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ccf6b0d87cbb43f930c16720966a555cf19654902304ace326d4ff1d7d0c7fb1","version":25},{"created_at":"2026-06-10T13:08:05Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"0a823379c6541ad793c85f43df106a89c63c7fe60707f4d7608945a19bee6c10","version":11},{"created_at":"2026-06-10T07:25:28Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"df50209fb447878aff5f64499106d3c72301623af53131754c8048c031b22896","version":2}]}