TypeScript SDK (workflow-js):
Fixed a Unicode issue in context.call where binary responses from endpoints could break. See here. Introduced WorkflowTool, allowing Workflow Agents to define multi-step workflows as a tool. See here. Added context.invoke to call one workflow from another with full type-safety. See the guide here. Introduced flow control parameters to limit the rate or concurrency of workflow runs. Learn more here. For additional bug fixes, see the full changelog here.
Workflow Server:
Added RateLimit and Parallelism controls to manage the frequency and concurrency of workflow runs. Learn more here.
Fetched April 8, 2026