{"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-g3n220yx","versions":[{"created_at":"2026-06-10T22:56:48Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote22448917 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8df55340950a99e9630c4b0d25d21ace42c1f867cab54285d957077582df4cc8","version":10},{"created_at":"2026-06-10T19:02:38Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"db8f4039fd9edb4591c352f7606c4cec36c107dbd43f39013c92c492af30da34","version":3}]}