I use Claude Code every single day. At my day job, it's my main agent, and I've talked plenty about how much I love it. But on my side projects, I like to play around with other agents: Codex, OpenCode, whatever new CLI shows up that week. And recently I hit a wall that turned out to be more annoying than I expected. I wanted to run a bunch of agents in parallel. Not one at a time, but several, across different projects, at the same time. And the moment I tried to do that, I realized every to...