{"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-8ut6kskb","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote22740658 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bace1da6b8258ee95abf0448ea86b09128aff6bf6d1deb0249c2910b0f33bc22","version":12},{"created_at":"2026-06-10T15:53:06Z","element_count":90,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"713bb2d18456c34b6d83b8012927dbab089637dbf40084de2e298d2bf93f45e4","version":4}]}