{"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-petterhousebungalow-y0fi5stp","versions":[{"created_at":"2026-07-16T09:39:19Z","element_count":90,"note":"5軸GA polish 39->92 by M5 (autonomous)","saved_by":"mcp","sha256":"1d5e5eb0866a237c5da3de8b1a58d89358a54d079a3bd1d03e20f8a3cc31d127","version":3},{"created_at":"2026-07-16T09:37:24Z","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":"455d4e5200e95ecf5431b7cd3c2acf5d71501a617b34a3bc0742add3d866aadf","version":2},{"created_at":"2026-07-16T09:37:22Z","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}]}