{"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-hxqb06ud","versions":[{"created_at":"2026-06-10T23:00:27Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote24636447 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"70afa8d76b4ae8a2eaeabbaaa11203ee71e28899ddcc2b10a5d767ad98a68047","version":9},{"created_at":"2026-06-10T21:27:49Z","element_count":85,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"5e34da2ac4719d5a1851673dea081eb91da56c6ee66034c3e0714a7e5f3566b9","version":3}]}