When creating a custom extension, whether using the CAST AIP Extension SDK or with the Universal Analyzer framework, it is possible (since CAST AIP 8.3.3) to auto distribute specific CAST AIP configuration files with the extension. These configuration files will be automatically installed when the extension is installed and will be taken into account when required. See Auto-distributing specific CAST AIP configuration files with a custom extension for more information.
Avoid hard coding CAST Storage Service operator and guest user names in SQL scripts
If your custom extension requires SQL scripts, you should avoid hard coding the CAST Storage Service "operator" and "guest" user names. Some instances of CAST Storage Service may not automatically contain these users, therefore you risk errors during deployment or upgrade.