This proposal introduces a new operator |> similar to F#, OCaml, Elixir, Elm, Julia, Hack, and LiveScript, as well as UNIX pipes. It's a backwards-compatible way of streamlining chained function calls in a readable, functional manner, and provides a practical alternative to extending built-in prototypes. ⚠ Warning: The details of the pipeline syntax are currently unsettled. There are two competing proposals under consideration. This readme is a minimal proposal, which covers the basic features of the pipeline operator. It functions as a strawman for comparing the tradeoffs of the competing proposals.