{"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-eastmanvillagehavenh-luza19lc","versions":[{"created_at":"2026-07-19T01:35:40Z","element_count":90,"note":"5軸GA polish 39->92 by M5 (autonomous)","saved_by":"mcp","sha256":"8f5d2fdeeb60ba37202d35f08b2106a6a7192098e8dd321b53a7b914392c1862","version":3},{"created_at":"2026-07-19T01:26:33Z","element_count":101,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c9083a177d236fbc5bbe7ca3be323e6d58f695bdc4577147938cbe6721e39eeb","version":2},{"created_at":"2026-07-19T01:26:32Z","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}]}