You gain the knowledge on how to create all the tech from the setting shown in the game “Stellaris”. This includes stuff such as FTL Star Ships, terraforming technologies capable of turning a frozen wasteland in the dead of space into a sprawling and lush garden world, megastructures such as massive Dyson Spheres or Ring Worlds, genetic engineering capabilities that can uplift primitive species or even grant Psionics.
Armed with your profound understanding of the sciences within Stellaris and its various expansions and mods, you possess the ability to create any technology that has been shown, referenced, or hinted at, with unparalleled knowledge, understanding, and crafting skills. All this and everything else from the setting is within your capabilities.