{"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-ki4af8il","versions":[{"created_at":"2026-06-11T01:56:40Z","element_count":84,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"110e08077317e9be443332e27315077a7615246bef019ee3809a2473f1c57a9b","version":7},{"created_at":"2026-06-11T00:05:41Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9fca7332a6de7b4ca8059a5cbaa226d6bb9e7024fe87b9ec861792f0a0dce65b","version":2}]}