{"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-usfvpmw8","versions":[{"created_at":"2026-06-10T22:52:10Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote24269040 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4647dce6581ed2ccfa0b5152d18ac407abb2945c510fe458253a52396417c727","version":25},{"created_at":"2026-06-10T13:13:28Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"74b1c66b49525b35311ff9474e847654d59716a33ce0a88538f870a54e8cb5d2","version":10},{"created_at":"2026-06-10T09:05:41Z","element_count":84,"note":"5軸GA polish 52->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ed34c09a8c583a744fdef27eea778a1f40909389b73967dccb21b3db6c7fb028","version":2}]}