{"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-v70wniv7","versions":[{"created_at":"2026-06-11T01:22:31Z","element_count":91,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"df503f90f0297ac86bb3f36cb5703997dff2c3917570e33cfbdfdaf604705212","version":11},{"created_at":"2026-06-10T22:53:02Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4bcedd48aab7941753a6af40f8d52058c7dd7fd199ca61726ab81de19725b8aa","version":2}]}