{"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-lightmakerscottage-ndw8uv0y","versions":[{"created_at":"2026-07-19T01:35:39Z","element_count":90,"note":"5軸GA polish 38->91 by M5 (autonomous)","saved_by":"mcp","sha256":"c53fc4cab3b16e67d9942d96252a12c08082f544259d9abdbc7e87916159412c","version":3},{"created_at":"2026-07-19T01:26:17Z","element_count":101,"note":"loop3: 設計時延床 48.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d12f2ae1ade5add3e5b3cdd0e444b6091cdab56121a7642c668f7a57c9b5b4e9","version":2},{"created_at":"2026-07-19T01:26:16Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}