{"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-zt6wc3v9","versions":[{"created_at":"2026-06-22T19:39:32Z","element_count":70,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"31ee96e7131ede2ba5244e942f80a05167d3c03dcdf64bb5a77289a8ede3e3e3","version":3},{"created_at":"2026-06-22T19:25:46Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9d281f0c318024850af3bbc261938f9f56c139ec174795fc48f0784f0c5c3c35","version":2},{"created_at":"2026-06-22T19:25:46Z","element_count":88,"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}]}