Sticky Hands Off the Red Button: Approvals, Events, and Resumable Agents in HazelJS (opens in new tab)

Picture a “helpful” agent that can refund any order or delete any database row the moment the model feels confident. Legal signs off on the demo deck; nobody reads the fine print in processRefund until finance asks why last Tuesday’s refunds doubled. HazelJS treats dangerous tools as first-class policy objects: mark them with requiresApproval: true, listen for TOOL_APPROVAL_REQUESTED on the runtime, and call approveToolExecution only from a workflow you trust. The same runtime supports resume...