{"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-cojt0069","versions":[{"created_at":"2026-07-04T19:34:15Z","element_count":71,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"7cb66dea2bcfb289cdaa7cec877bca85533c3cbf7706092a9fb625a67beb3039","version":3},{"created_at":"2026-07-04T19:22:20Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bdd4cfb820cc844ee8ab28054315926fa155021e0edafecd5c12e0f2f3c548b7","version":2},{"created_at":"2026-07-04T19:22:20Z","element_count":101,"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}]}