Summary
On September 15, 2026, Cloudflare Workflows added WorkflowInstance.subscribe(), letting developers stream instance and step events - including attempts, sleeps, waits, and rollbacks - from a Worker or the API instead of polling for status.
What changed
Workflows introduced WorkflowInstance.subscribe() to stream workflow and step events (attempts, sleeps, waits, rollbacks) in a Worker or via the API, removing the need to poll instance status.
Why it matters
Long-running agent and orchestration workloads need live visibility into durable-execution state. Event streaming makes it practical to build real-time dashboards, human-in-the-loop approvals, and reactive control over agent workflows without polling overhead.
Evidence excerpt
monitor workflow and step events, including attempts, sleeps, waits, and rollbacks, without polling.