{"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-iyc22fed","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / jpy73729440→quote24198967 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c00bbf7348d4e879b9b5b501faeb499d3f9415626798b5e06dbcc18c2cdfb012","version":15},{"created_at":"2026-06-10T15:02:23Z","element_count":83,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"06f861fcab2afefdc7dec885d27c44783d491e21e4423e334b70613d9c944e93","version":6}]}