{"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-kirkwoodhouse-p3u5h5c8","versions":[{"created_at":"2026-08-14T16:10:02Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f1b73fe41be11274253616d75af01833a4e9858a8b770a3c359e907bda68f7a5","version":2},{"created_at":"2026-08-14T16:10:01Z","element_count":126,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}