{"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-riverstonebungalowho-m77yju14","versions":[{"created_at":"2026-08-14T23:14:41Z","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":"ec77a1e128d92fbb67f0b9e6ee384d4b0118dc0d992a2dcdb5d37c1dda20e8e2","version":2},{"created_at":"2026-08-14T23:14:40Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}