Issues

• AwsCredentialsFile reports "profile not found" for profiles that are present, hiding the real parse error

  AWS support
  disneystreaming/smithy4s#2007 · Filter by author kubukoz opened on Sep 23, 2026

• Validate AWS endpoint resolution for all services against the models' own endpointTests

  AWS support
  disneystreaming/smithy4s#2006 · Filter by author kubukoz opened on Sep 23, 2026

• Generated "$ordinal" members cause warnings on Scala 3.9

  disneystreaming/smithy4s#2000 · Filter by author kubukoz opened on Sep 3, 2026

• smithy4sWildcardArgument in generated-metadata.smithy causes conflicts

  bug
  disneystreaming/smithy4s#1999 · Filter by author zkerriga opened on Aug 28, 2026
  1

• Incorrect codec implementation for recently added "date" types

  disneystreaming/smithy4s#1988 · Filter by author drewfeelsblue opened on Jul 21, 2026
  2

• Codegen produces smithy.api.String instead of java.lang.String when applying certain alloy traits

  bug
  disneystreaming/smithy4s#1948 · Filter by author a-morales opened on May 5, 2026
  5

• cats: add Transformation derivation for cats.~> (FunctionK)

  disneystreaming/smithy4s#1931 · Filter by author kubukoz opened on Apr 28, 2026

• smithy4s.time.OffsetDateTime.fromJava, smithy4s.time.LocalTime.fromJava and smithy4s.time.LocalTime#toJava return wrong results

  disneystreaming/smithy4s#1917 · Filter by author plokhotnyuk opened on Apr 14, 2026
  4

• Allow applying Smithy constraint traits (@length, @pattern, @range, …) to refined simple shapes when a matching RefinementProvider exists

  disneystreaming/smithy4s#1874 · Filter by author ghostbuster91 opened on Jan 22, 2026
  3

• ADT unions are prone to member naming conflicts

  codegen
  Bug

  disneystreaming/smithy4s#1862 · Filter by author kubukoz opened on Dec 5, 2025
  1

• feature: Add generateOpenApiSpecs option to sbt-plugin

  disneystreaming/smithy4s#1853 · Filter by author ghostbuster91 opened on Oct 28, 2025

• Scala 2 "implicit" no longer supported with -source:future on Scala 3.7.3

  disneystreaming/smithy4s#1852 · Filter by author LeifW opened on Oct 24, 2025
  2

• AwsCredentialsFileException occasionally happens.

  AWS support
  disneystreaming/smithy4s#1847 · Filter by author i10416 opened on Oct 17, 2025
  3

• Generate iron/refined types instead of ValidatedNewtype

  enhancement
  disneystreaming/smithy4s#1844 · Filter by author drewfeelsblue opened on Oct 13, 2025

• Extend renderValidatedNewtypes to Support Collection Types

  disneystreaming/smithy4s#1843 · Filter by author ghostbuster91 opened on Oct 13, 2025
  7

  

• Allow to render collection types as wrapped

  disneystreaming/smithy4s#1842 · Filter by author ghostbuster91 opened on Oct 13, 2025
  1

• Adding -source:future causes compilation errors due to unsupported wildcard syntax

  disneystreaming/smithy4s#1841 · Filter by author arixmkii opened on Oct 10, 2025
  2

• Update sbt build to have cross builds for codegen

  disneystreaming/smithy4s#1830 · Filter by author a-morales opened on Sep 16, 2025

• Constraint traits not rendered when applied directly on enums

  bug
  disneystreaming/smithy4s#1825 · Filter by author kubukoz opened on Sep 5, 2025

• Pure Caching

  has PR
  disneystreaming/smithy4s#1815 · Filter by author lewisjkl opened on Aug 21, 2025 · 0.19.0

• Smithy4sThrowable toString ignores fields if message is present

  bug
  disneystreaming/smithy4s#1805 · Filter by author kubukoz opened on Aug 11, 2025
  4

  

• Union member names not deconflicted against the union

  disneystreaming/smithy4s#1797 · Filter by author kubukoz opened on Aug 4, 2025

• Compile-time validated newtypes?

  enhancement
  disneystreaming/smithy4s#1784 · Filter by author kubukoz opened on Jul 23, 2025
  4

• Conflict resolution not quite working

  disneystreaming/smithy4s#1779 · Filter by author kubukoz opened on Jul 17, 2025

• Arity errors (too many headers) are confusing

  enhancement
  disneystreaming/smithy4s#1767 · Filter by author kubukoz opened on Jun 25, 2025