{"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-okkfmpi0","versions":[{"created_at":"2026-06-10T22:52:41Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21491622 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c815d038efe4ca3a94e1e450c2381719b74a2435dce72273cd40c895bc93d93c","version":13},{"created_at":"2026-06-10T15:19:20Z","element_count":84,"note":"5軸GA polish 51->98 by M5 (autonomous)","saved_by":"mcp","sha256":"22d128c2e41cf2fdfdb779e04c8b1edbae72c38e6a71de0aff1b3006fcd7d42d","version":5}]}