{"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-5gszu5v2","versions":[{"created_at":"2026-06-15T06:08:53Z","element_count":92,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"2845a8c6ba6f8e1808e4aa136fc5b90dc6a3dab29adbdd4632b50e65c89cfda3","version":3},{"created_at":"2026-06-15T05:55:01Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d3697e8b7a28dee6a1ba3dd692cfc08fa13718f4bfbeb92857358b42ee7910c7","version":2},{"created_at":"2026-06-15T05:55:01Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}