Scala Improvement Process

The Scala Improvement Process covers changes to the Scala language, the Scala compiler, and the core of the Scala standard library.

Scala Improvement Process

The Scala Improvement Process is a process for submitting changes to the Scala language. This process aims to evolve Scala openly and collaboratively.

The process covers the Scala language and compiler and the core of the Scala standard library. (The core is anything that is unlikely to be spun off into a separate module.)

A proposed change requires a design document, called a Scala Improvement Proposal (SIP). The SIP committee meets monthly to discuss, and eventually vote upon, proposals.

A SIP is subject to a review process. Proposals normally include proposed changes to the Scala language specification. Before reaching the committee, a proposal normally receives community discussion and review on the Scala Contributors forum. Please read the SIP tutorial or the process specification for more information.

The aim of the Scala Improvement Process is to apply the openness and collaboration that have shaped Scala’s documentation and implementation to the process of evolving the language. The linked documents capture our guidelines, commitments and expectations regarding this process.

Historical note: The SIP replaces the older SID (Scala Improvement Document) process. Completed SID documents remain available in the completed section of the SIP list.