{"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-d0rk47kg","versions":[{"created_at":"2026-06-10T22:52:28Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote25453106 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b743f46357911773684e6cf202518a0ecc7166e6fb1dcc418de75f28950590e3","version":21},{"created_at":"2026-06-10T13:33:28Z","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":"a09b81a9594711ec380e2d7927117e0753b3bafc0c1ab7180d18ea75120d4619","version":7},{"created_at":"2026-06-10T12:31:47Z","element_count":90,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"713bb2d18456c34b6d83b8012927dbab089637dbf40084de2e298d2bf93f45e4","version":4}]}