{"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-7y79kuho","versions":[{"created_at":"2026-07-20T06:06:56Z","element_count":83,"note":"5軸GA polish 39->94 by M5 (autonomous)","saved_by":"mcp","sha256":"88d696ad85d3fe5149c036b065d98997ce69c80a8b59a7884ea67ae55b432462","version":3},{"created_at":"2026-07-20T06:00:32Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1a70b6fce444915b65e098d625f00bce55a8b9497bf73e158819cfe35d973431","version":2},{"created_at":"2026-07-20T06:00:32Z","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}]}