{"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-7ldtzv98","versions":[{"created_at":"2026-07-04T19:34:16Z","element_count":89,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"89bcfbb1d9ec42e99e50454d922e3d23eeb2c466b9189b3217d3c7c8e62738e1","version":3},{"created_at":"2026-07-04T19:30:19Z","element_count":119,"note":"loop3: 設計時延床 80.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"af3b877a614b5d3782da92697aea94bde44a558ce9cda3b358f11d8fa915dc2a","version":2},{"created_at":"2026-07-04T19:30:19Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}