Clone this repo:


  1. a342195 internal/encoding/json: improve decoding of JSON numbers for floats by Herbie Ong · 3 days ago master
  2. f503c30 all: re-add go.mod and go.sum files by Joe Tsai · 2 days ago
  3. 4fddeba all: move v1 types over to the v2 repository by Joe Tsai · 4 days ago
  4. 4532dd7 internal/fileinit: prevent map entry descriptors from implementing MessageType by Joe Tsai · 5 days ago
  5. 300cff0 encoding/textpb: clean up tests on Any by Herbie Ong · 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.