{"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-f41bwjra","versions":[{"created_at":"2026-06-13T20:29:16Z","element_count":90,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"6995ac3d0db52478c22f69e55f035516df5e569d23a81afd98d097dae1da5da0","version":3},{"created_at":"2026-06-13T20:19:49Z","element_count":101,"note":"loop3: 設計時延床 60.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"de67f24939f388aa758ec7237a94a00b8f1d73656ca7fa7a444dd32c9302ef3f","version":2},{"created_at":"2026-06-13T20:19:49Z","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}]}