Remove instanceof Error checks from is methods (#1162). This fixes various regressions observed when running Workflow tests with Jest.
Add the VersioningIntent parameters on the experimental worker versioning feature (#1156). Also, all values of the ReachabilityType type has been converted to SCREAMING_CASE.
[workflow] Make workflows.log()'s attributes argument optional (#1159).
[workflow] Attach workflows.log()'s attributes to every workflow log message (#1159).
Fetched April 11, 2026