{"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-3b5bq63u","versions":[{"created_at":"2026-06-10T23:00:15Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21228016 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5ea04044593ee2a91090ed9b6ab6346495c358e41a262e3b8273888eaf617fb0","version":9},{"created_at":"2026-06-10T21:11:38Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"84bf64d2870b77dc35e669bc563bf4219da12f8a2591a118b29ff43fb4133228","version":3}]}