{"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-adelmillhouse-3drrovz9","versions":[{"created_at":"2026-08-15T21:54:39Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"208b29a2d8aee9f9ddf5412317a5cb158346d918e924e3a216d48aa421c9c88b","version":2},{"created_at":"2026-08-15T21:54:39Z","element_count":85,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}