Release 2026-09-23

Release 2026-09-23

Amazon.Lambda.DurableExecution (2.1.0)

• Added an incremental, branch-oriented parallel API (IDurableContext.CreateParallel, IDurableParallel, IParallelBranch) supporting heterogeneous per-branch result types and incremental branch registration, alongside the existing homogeneous ParallelAsync overloads. Each branch declares its own result type and returns an awaitable typed handle; branches start on registration (respecting MaxConcurrency) and the operation is sealed with CompleteAsync. Honors the existing MaxConcurrency, CompletionConfig, NestingType, cancellation, deterministic replay, and ILambdaSerializer behavior.
• CreateParallel supports per-operation and per-branch result serialization: ParallelConfig.ItemSerializer sets the operation-level serializer for all branch results, and IDurableParallel.Branch accepts an optional per-branch ILambdaSerializer override, falling back to ItemSerializer and then the globally-registered serializer.

Amazon.Lambda.TestTool (0.16.1)

• Report missing Test Tool startup options as a user error