{"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-1zrqcpa9","versions":[{"created_at":"2026-07-03T06:14:57Z","element_count":90,"note":"5軸GA polish 41->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c9715949f42dde3b0f6b460fde70a8eeebd29b84b8643f2d0e8478137dcbb7a4","version":3},{"created_at":"2026-07-03T06:02:13Z","element_count":119,"note":"loop3: 設計時延床 40.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a349d9d4208ad72d36c09a532f09daa1a2c7089e319f8f3223d383fde18562e9","version":2},{"created_at":"2026-07-03T06:02:12Z","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}]}