{"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-nessviewbungalow-ckhejka4","versions":[{"created_at":"2026-08-14T23:10:00Z","element_count":109,"note":"loop3: 設計時延床 110.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5557e3743048d77cb2d00a40e19277236bb7f8cf440089479a3eb36f258d1f0d","version":2},{"created_at":"2026-08-14T23:10:00Z","element_count":109,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}