{"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-rhmzfehc","versions":[{"created_at":"2026-07-13T19:29:28Z","element_count":72,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"30831603a550671cb1eb0c7a11f5ba316dc0ed2e180ff9ad7a6191bca8c8514f","version":3},{"created_at":"2026-07-13T19:25:41Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9f672376f28cb02cf1d7ac99bd31bb25fb850aafd63d1bfe566a9905ebf28a2f","version":2},{"created_at":"2026-07-13T19:25:40Z","element_count":85,"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}]}