{"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-willowbrookcottageho-vkfw3jyx","versions":[{"created_at":"2026-07-03T04:10:05Z","element_count":82,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"a04eb67ebb8788213633db133f183c438dcb8ef78203ce7715fb53b84341c32e","version":3},{"created_at":"2026-07-03T03:58:21Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"98ab4bc092a8268cab858e7fde74deb6b93584fd9be5544c4c62d6a576e2e14a","version":2},{"created_at":"2026-07-03T03:58:20Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}