• Support Python 3.14, including freethreaded mode (#852, #877).
• Expose the StructMeta metaclass (#890, #927, #928, #940, #945).
• Add msgspec.inspect.is_struct and msgspec.inspect.is_struct_type functions for checking whether an object is a msgspec.Struct-like instance or class (#950).
• Support Windows arm64 builds (#943).
• Enable ThinLTO on macOS aarch64 builds (#937).
• Fix leaks of re.Pattern objects when using pattern constraints of msgspec.Meta (#899).
• Fixed memoryview support for msgspec.msgpack (#836).
• Fix crash when typing.TypedDict contains incorrect metadata (#853, #947).
• Add setuptools-scm as a build dependency instead of vendoring versioneer (#905).
• Remove support for legacy packaging builds (#907).
• Improved the developer experience by adding the just command runner and Dev Container support (#918).