{"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-house-et5rykzg","versions":[{"created_at":"2026-07-07T19:36:20Z","element_count":84,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"62a7199518723437421c6aaeb2814ac7771af1829090cadf8c8bc62395543c53","version":3},{"created_at":"2026-07-07T19:33:23Z","element_count":119,"note":"loop3: 設計時延床 73.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d64c14d3980ba22bf0db92ee640ecfc28080a62509f1e13f83baae5be38fa90a","version":2},{"created_at":"2026-07-07T19:33:23Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}