{"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-jhpkz93m","versions":[{"created_at":"2026-07-02T19:42:32Z","element_count":68,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"3b8e0cb26dcc380141a228b58de49f40802f82c4c708371c2fcb6f4d6d47d8eb","version":3},{"created_at":"2026-07-02T19:34:27Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d8eba025685394a8743e7b2f94960113cfaaea0f0bb0a17be9851e0706184eeb","version":2},{"created_at":"2026-07-02T19:34:27Z","element_count":90,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}