See this article from September 11, 2023 by Daniel Sturman, Chief Technology Officer, Roblox ...
To make Assistant the best partner it can be, we made another announcement at RDC: We invited developers to opt in to contribute their anonymized Luau script data. This script data will help make our AI tools, like Code Assist and Assistant, significantly better at suggesting and creating more efficient code, giving back to the Roblox developers who use them. Further, if developers opt to share beyond Roblox, their script data will be added to a data set made available to third parties to train their AI chat tools to be better at suggesting Luau code, giving back to Luau developers everywhere.