Rearchitecting the Workflows control plane for the agentic era

Cloudflare rearchitected its Workflows control plane to support agent-triggered workflows at machine speed, scaling from 4,500 to 50,000 concurrent instances and 100 to 300 creations per second.

• •V1's single account-level Durable Object became a bottleneck when customers needed thousands of instances per minute
• •V2 introduces SousChef to manage metadata per workflow and Gatekeeper to distribute concurrency slots, enabling horizontal scaling
• •Routing now goes directly to Engine instances, reducing network hops to one and improving listing performance
• •Background tasks and alarms keep hot-path operations fast while ensuring at-least-once reliability

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