Python SDK (workflow-py):
Began development of the Python SDK.
TypeScript SDK (workflow-js):
Added support for string durations (e.g., 1d, 30s) in context.sleep and context.waitForEvent. Introduced integrations for Astro and Express. Added client.trigger, enabling workflows to start and return the workflow run ID. See the documentation. Added a retry option for context.call. See the documentation. Introduced a lazy fetch feature to support longer and larger workflows on resource-limited platforms. Added context.cancel to cancel the current workflow. See the documentation. Full changelog, including fixes, is available here.
Workflow Server:
Added bulk cancel functionality for workflow runs. See the REST API. Introduced content-based deduplication for workflows and retry-until-success functionality. This will allow workflows to be used in areas with unstable network connection.
Fetched April 8, 2026