We use the Claude Agent SDK and the Codex App server, which makes it easier to maintain (we used to parse out the literal terminal when we first launched, which was not maintainable - https://news.ycombinator.com/item?id=44878650). There's also ACP (https://agentclientprotocol.com/get-started/introduction) which we'll probably integrate eventually, which should make it easier to manage all the harnesses.