{"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-yj5ba3tf","versions":[{"created_at":"2026-06-10T22:55:38Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote23910325 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"83295830644baa7fb166f2a510cf94521f596e565d684bc4ecf18541fdf4aadd","version":10},{"created_at":"2026-06-10T18:13:52Z","element_count":73,"note":"5軸GA polish 52->95 by M5 (autonomous)","saved_by":"mcp","sha256":"cf3cc92dec5916d12362a9e770a46e23b2013a28cf50fa748124461e6e1c4d48","version":3}]}