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  1. 7fa1ee5 encoding/protojson: parse groups according to their real proto name by Joe Tsai · 4 days ago master
  2. 84177c9 all: use typed variant of protoreflect.ValueOf by Joe Tsai · 36 hours ago
  3. 705acad proto: reset message by default in Unmarshal by Joe Tsai · 4 days ago
  4. efdf02e internal/filedesc: gracefully handle unresolved enums by Joe Tsai · 2 days ago
  5. 8689fa5 encoding/prototext: add UnmarshalOptions.DiscardUnknown by Joe Tsai · 4 days ago

Next Generation Go Protocol Buffers

WARNING: This repository is in active development. There are no guarantees about API stability. Breaking changes will occur until a stable release is made and announced.

This repository is for the development of the next major Go implementation of protocol buffers. This library makes breaking API changes relative to the existing Go protobuf library. Of particular note, this API aims to make protobuf reflection a first-class feature of the API and implements the protobuf ecosystem in terms of reflection.

Design Documents

List of relevant design documents:


We appreciate community contributions. See

Reporting Issues

Issues regarding the new API can be filed at Please use a APIv2: prefix in the title to make it clear that the issue is regarding the new API work.