rbitr

What it does

Your AI agent has write access to production. Do you actually control what it does? rbitr is the enforcement layer between agents and the tools they call. Real-time policy, human-in-the-loop approvals, and an immutable audit trail. Built for teams shipping agents that take real actions.

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  Hi HN, Fernando and I built Kastra. Kastra intercepts AI agent tool calls and evaluates them against deterministic policies before they execute. We built this product to control pre- and post-inference workloads. This is aimed at developers using coding agents like Claude Code, Codex, Cursor, and OpenClaw. Kastra pushes an allow, hold, and deny decision before the action runs. You can build these policies in plain English from the web app. The interception engine evaluates the tools, targets, and parameters of every action at sub 1ms at a scale of billions of interceptions per day. We also…

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