{"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-3a0he0h7","versions":[{"created_at":"2026-06-10T23:01:17Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21571339 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ba9394788e9d0f9d918098b3090a3621930ee24964eac6d83ab128ed0fbad7a6","version":9},{"created_at":"2026-06-10T22:00:55Z","element_count":70,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"cc5e778f87ca3639568d378bbf30074b70175d67751e024e9803d7aa4b2f4353","version":3}]}