One Harness, Zero Standing Secrets: Derek Meegan (Browserbase) on Building bb
Derek Meegan · Software Engineer at Browserbase
We sit down with Derek Meegan, a software engineer at Browserbase and the lead behind their internal AI agent bb, to dig into how a well-built harness, not more model autonomy, is what makes agents safe to scale. Derek explains how bb reached 100% feature-request coverage with zero human effort and answers 99% of support first responses in under 24 hours, all while staying verifiably secure. We get into bb's security architecture: code mode sandboxing, just-in-time credential brokering through an integration proxy so there are no standing secrets, least-privilege tools, and per-invocation permissions. Derek's thesis is that agents should eliminate repetitive, well-understood work while the harness around them enforces the guarantees, and we talk through what that looks like in practice.
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