{"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-j7tqe78w","versions":[{"created_at":"2026-06-13T17:39:14Z","element_count":90,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"300f3e29f25867f9473004e8f70ea836d61a615888c5bf753b76544e9460b035","version":3},{"created_at":"2026-06-13T17:25:33Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0d4703625cdddd5dd19b243e8465bd92dbbbae935cdf63ad14a785d102959d19","version":2},{"created_at":"2026-06-13T17:25:32Z","element_count":119,"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}]}