{"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-eqet03zl","versions":[{"created_at":"2026-08-14T23:09:25Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"67dc933261bfb534fac64ecdd9bbd4c42a285b7c8ea6368aa90248464de7e2ef","version":2},{"created_at":"2026-08-14T23:09:24Z","element_count":105,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}