{"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-zri8tbdq","versions":[{"created_at":"2026-06-15T06:20:56Z","element_count":73,"note":"5軸GA polish 46->95 by M5 (autonomous)","saved_by":"mcp","sha256":"f5ba26d6071828d4bb07bdd31865ae49ba820f831d448a3e7a2003e83f13b7fd","version":3},{"created_at":"2026-06-15T06:06:54Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6a03a88116522e7e4fcf55c397a4e89a5f3ae233a8dc3e742b99f1d08679fe44","version":2},{"created_at":"2026-06-15T06:06:54Z","element_count":85,"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}]}