{"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-0vtqftto","versions":[{"created_at":"2026-07-02T19:42:32Z","element_count":84,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"414c273ed01b67ccd7634e36d1aa3493d7a0937b7b97821a461f5c2282fa1f77","version":3},{"created_at":"2026-07-02T19:29:28Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d21e41aaf099179eb99f7dee5f2b94c34cab5a5d552274e278fe43b2621df266","version":2},{"created_at":"2026-07-02T19:29:27Z","element_count":105,"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}]}