Riot has released two agents, Gekko and Deadlock, and there is one more agent yet to be released this year. Riot has already confirmed that it will be a Duelist, and could be one with codename Architect, leaked by VALORANTLeaksEN. The leaker shared the image of a folder with this codename on Twitter, and you can look at it below.
However, you need to keep in mind that multiple agent concepts get worked on, and some of them are scrapped, and thus, it might or might not be the next agent coming to Valorant, as the previous leaks pointed out towards the codename "Hyperfocus."
As of now, we don't know what the role of the Architect will be or what sort of abilities it will have, as nothing has been revealed by Riot. We will update this page once we have more information about the Architect agent, so make sure to keep an eye on it.