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msgspec.defstruct is not compatible with msgspec.StructMeta

Status: Open.

#974 In jcrist/msgspec;

· kunesj opened on Jan 30, 2026

Cannot decode MSGPACK into Struct with bytes | str

Status: Open.

#973 In jcrist/msgspec;

· ypnos opened on Jan 26, 2026

Allow annotation of tag fields

Status: Open.

#972 In jcrist/msgspec;

· umarbutler opened on Jan 26, 2026

Missing libm linkage for _core extension causes undefined symbol errors

Status: Open.

#971 In jcrist/msgspec;

· BwL1289 opened on Jan 9, 2026

Evolving a Struct into a Union

Status: Open.

#968 In jcrist/msgspec;

· evelyno-rigetti opened on Jan 7, 2026

NamedTuple hash changes during round trip msgspec deserialisation in python 3.14

Status: Open.

#967 In jcrist/msgspec;

· rshanker779 opened on Dec 30, 2025

Experiment with faster dtoa algorithm

Status: Open.

#966 In jcrist/msgspec;

· ofek opened on Dec 18, 2025

Support encoding/decoding bytes to/from hex strings

Status: Open.

#964 In jcrist/msgspec;

· iliastsa opened on Dec 3, 2025

msgspec.structs.fields() is 20x slower than dataclasses.fields()

Status: Open.

#963 In jcrist/msgspec;

· kramar11 opened on Dec 2, 2025

C-API Capsule and Cython Bindings

Status: Open.

#958 In jcrist/msgspec;

· Vizonex opened on Nov 26, 2025

Types inheriting from GenericAlias types (such as <code>Mapping</code>) cannot be decoded.

Status: Open.

#957 In jcrist/msgspec;

· mwaddoups opened on Nov 26, 2025

Replace <code>PyYAML</code>

Status: Open.

#955 In jcrist/msgspec;

· chirizxc opened on Nov 24, 2025