Champions: @syg, @vdjeric, @Yoric, @kannan-vijayan
Spec Repo: https://github.com/syg/ecmascript-binary-ast/
First presented at the July 2017 meeting: https://github.com/tc39/agendas/blob/master/2017/07.md

Why is this relevant

Babel operates on an AST, and would be part of the toolchain that should be able to take advantage of this format. This would help consolidate tooling to use the same AST. Would be a breaking change, unless our AST is adopted (unlikely, and probably not desired).