{"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-7c8xp8y3","versions":[{"created_at":"2026-06-13T15:15:56Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"eb2ee188261acadde527b8eb2a34a133a5aaf3e0344a8d5b4ebb2593446fb30b","version":3},{"created_at":"2026-06-13T15:11:38Z","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":"d2fe5d3c3eee47b2265644f9d40d65388602a5f9a0c4ebc6c6395dc763c61da3","version":2},{"created_at":"2026-06-13T15:11:35Z","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}]}