{"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-zodlcc0o","versions":[{"created_at":"2026-06-25T07:21:03Z","element_count":89,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"5f346549bdf7205640ab6509ead7f24c5c240cce6ed9253f2dc17aa06d753ac0","version":3},{"created_at":"2026-06-25T07:14:55Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d71bd31c37f18d1d4ca8e64bfd8e431d617d5ba8ef9c883142da134356b3d4ca","version":2},{"created_at":"2026-06-25T07:14:54Z","element_count":87,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}