{"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-newtoncourtbungalow-1amco2pc","versions":[{"created_at":"2026-06-28T09:33:05Z","element_count":82,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"c6a4bc79bff6875f1223f889bebe3e53d6c28bd2a21bb643ea814f839a3cc89e","version":3},{"created_at":"2026-06-28T09:27:19Z","element_count":83,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"11395795cf7971b0b4da833a06c8f4129e126fac8b764deb17c6fc16b70a92d6","version":2},{"created_at":"2026-06-28T09:27:18Z","element_count":83,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}