Clone this repo:


  1. 591f09a internal/fuzz: add basic fuzzing target for Marshal/Unmarshal by Damien Neil · 3 months ago master
  2. d01061a internal/impl: print <nil> for typed nil messages by Joe Tsai · 9 days ago
  3. c1507ac encoding/protojson, encoding/prototext: remove most explicit registries by Damien Neil · 6 days ago
  4. 3b65992 all: remove {Enum,Message,Extension}Type.GoType methods by Damien Neil · 11 days ago
  5. 7361887 reflect/protoregistry: protect global registries with a lock by Joe Tsai · 10 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.