{"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-9197zg0y","versions":[{"created_at":"2026-06-10T22:57:36Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy53236569→quote20863604 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f46297a172cc265c8f0973cafdb6ee29b4fb42d1ae47cd7303c34d984ac0a19c","version":9},{"created_at":"2026-06-10T19:34:23Z","element_count":84,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"1852e9364586a7b3885b4936d8a5a57c61612e2f84d1e58499e369c7fa2ea64c","version":2}]}