First, I should confirm if Sahara is indeed referring to OpenStack Sahara. If so, XML files might be part of the plugin definitions or job templates. Let me recall the structure. For OpenStack Sahara, plugins are YAML-based, not XML. Maybe the user is confused. Alternatively, maybe they need an XML configuration for some other project.
Sites like XDA Developers provide user-tested, full stock firmware packages for almost all major devices.
Flashing files are strictly . Using the wrong file can permanently "hard brick" your device.
Could you clarify which system or dataset you're working with, and what "proper post" refers to?