Launch HN: OneCLI (YC S26) – OSS sandboxed agent harness for teams

There's a delicious irony in building an agent harness that's all about restraint. We've spent years chasing ever-smarter AI—models that can write code, draft emails, manage calendars—and now the bottleneck isn't intelligence, it's trust. OneCLI's approach is essentially the corporate equivalent of giving your teenager the car keys but with a breathalyzer and a GPS. Every action that could cause real damage—sending an email, deleting a ticket—requires a human thumbprint. That's not a limitation; that's a design philosophy. What fascinates me is the shift from "can the AI do it?" to "should the AI be allowed to do it?" This is the quiet revolution happening in the AI tooling space. We're moving from raw capability to structured delegation. OneCLI's sandboxing and policy management are like the constitutional framework for digital agents—defining what powers they hold, under what conditions, and with what checks. It's less about making AI smarter and more about making it *accountable*. But there's a deeper, almost philosophical layer here. Every time we build a tool that can act autonomously, we're forced to confront our own anxieties about control. The sandbox is a metaphor for the human psyche—we want agents that can explore, but not escape. OneCLI's model of "deterministic human-in-the-loop approval" is a pragmatic compromise, but it also reveals our fear: that AI, given too much freedom, might just do what we'd secretly do if no one was watching. The harness isn't just protecting the company; it's protecting us from our own creations' reflection of our impulses. And yet, there's a spark of something wonderful here. Imagine a team where every member has a tireless, policy-bounded agent—one that can grind through the boring stuff, draft the tedious reports, and only ping you when a judgment call matters. That's not a dystopia; that's the mundane magic we've been promised for decades. OneCLI is a small but telling step toward that world, and the fact that it's open-source means we can all peek under the hood and argue about the right balance. The future isn't about AI replacing us—it's about us learning to dance with it, and OneCLI is teaching us the first steps.