{"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-81s6oyhq","versions":[{"created_at":"2026-06-10T22:52:29Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote25684102 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8df2335df7bfcffba953e46cbf107b7b3d1e248a94fc3f1ecb5981d777a61ea6","version":21},{"created_at":"2026-06-10T13:34:17Z","element_count":65,"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":"f7f2d2381b631f972519286ec64e704b023f6d80804f55e03231d6874d396ff5","version":8},{"created_at":"2026-06-10T12:31:45Z","element_count":90,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"713bb2d18456c34b6d83b8012927dbab089637dbf40084de2e298d2bf93f45e4","version":4}]}