{"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-willowbrookhouse-2aoqwra5","versions":[{"created_at":"2026-06-13T19:16:54Z","element_count":72,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"9b7cbd3585b2c3812c0563dd15bd7fe0075988cba0b64ba6b2dbefc19d302f40","version":3},{"created_at":"2026-06-13T19:13:23Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9b46e46debaec7bda0dd30dff48c328ac7ae6396f22f94210a4a5699fb50e36f","version":2},{"created_at":"2026-06-13T19:13:23Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}