@temporalio/workflow 1.22.0

v1.22.0

on Node.js NPM

What's Changed

Added

• Experimental: Added TypeInfo and TransferTypeConverter to @temporalio/common for converting
  application values to and from serialization-friendly transfer types and supplying converter-specific hints.
• Workers can now configure the number of activity slots reserved for eager execution per
  workflow task with maxEagerActivityReservationsPerWorkflowTask. Setting it to zero disables
  eager activity execution.
• UpdateWorkflow-backed Nexus operations. A Temporal Nexus operation can now be backed by a Workflow
  Update via TemporalNexusClient.getWorkflowHandle(...).update(...), in addition to a Workflow run.
  The Update request carries the Nexus request ID (for deduplication), the request links, and a
  completion callback bearing the operation token, so the Update's completion is delivered back to the
  Nexus caller. Only asynchronous, ACCEPTED-stage updates are supported (a callback URL is
  required); an update that has already completed is returned synchronously, and a completed-with-error
  update (e.g. a validation rejection) surfaces as a failed Nexus operation. Cancellation is
  customizable via the cancelWorkflowUpdate handler option; the default rejects with a
  NOT_IMPLEMENTED handler error.
• @temporalio/ai-sdk: listToolsActivity/callToolActivity now reuse a single MCP client connection
  across repeated invocations for the same server instead of creating and closing one on every call.
  Configure the idle window via the new mcpConnectionIdleTimeout option on createActivities and
  AiSdkPluginOptions (defaults to 5 minutes); pass mcpConnectionIdleTimeout: 0 to opt out and restore
  the original behavior for MCP servers/transports that don't tolerate a reused or concurrent session.

Changed

• Updated Core to 65b25ada (temporal-core 0.6.0)

Fixed

• strands: Declare zod as a peer dependency.
• workflow-streams: WorkflowStream.onPoll no longer serves a stale log index for a poll that
  was parked across a truncate() call, which could silently skip events.
• Workflows no longer retain completion state when a child Workflow fails or is cancelled before starting.
• Local Activity tests now use makeTestFunction to manage their test environment.

Security

• Bumped the vendored quinn-proto in @temporalio/core-bridge's Cargo.lock from 0.11.14 to
  0.11.15, clearing GHSA-4w2j-m93h-cj5j / RUSTSEC-2026-0185 (unbounded out-of-order stream
  reassembly DoS) for downstream image scanners.

New Contributors

• @Bathula-Adiseshu made their first contribution in #2267
• @aayushbaluni made their first contribution in #2036
• @wankhede04 made their first contribution in #2223
• @becho2 made their first contribution in #2293

Full Changelog: v1.21.1...v1.22.0