smithy-lang/smithy 1.74.0

Smithy CLI v1.74.0

on GitHub

1.74.0 (2026-09-24)

Features

• Added benchmark models for measuring the performance of serialization and
  deserialization (#3274)
• Expand unstable trait for preview usage.
  (#3277)
• Update stale error message for AddedRequiredMember
  (#3261)

Bug Fixes

• Fixed resource property and identifier bindings not being discovered through
  the output list member of list lifecycle operations, fixing
  ResourceOperationInputOutput errors for list-only resources. Collection
  operations can now bind properties and identifiers through list elements
  explicitly by applying @nestedProperties to an input or output member
  targeting a list of structures.
  (#2968)
  (#3269)
• Resolve endpoint rule-set components against the model's classloader
  (#3267)
• Fixed an issue where closure documentation was not being parsed.
  (#3276)
• Unmarked contentMediaType as unsupported in 3.1 OpenApi Spec
  (#3275)

Documentation

• Added client guidance for interceptors.
• Added client guidance for plugin composition, ordering, and discovery.
  (#3283)