{"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-vkwwxia1","versions":[{"created_at":"2026-07-05T17:47:01Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"81266cd5710022b60cdfa025b321d1eb48278e33482b98dee16776f41345ecd0","version":3},{"created_at":"2026-07-05T17:38:10Z","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":"b9a721e7fdf363cb508db0949621704102175ebe95eaeb70ea6655386db4ecc4","version":2},{"created_at":"2026-07-05T17:38:10Z","element_count":105,"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}]}