# The State of Ruby 3 Typing

DevFeed: [The State of Ruby 3 Typing](<https://devfeed.tech/articles/the-state-of-ruby-3-typing-15920.md>)

Original publisher: [Read original article](<https://developer.squareup.com/blog/the-state-of-ruby-3-typing>)

Author: Soutaro Matsumoto

Published: 2020-07-29T19:00:00Z

Content type: release

Language: en

Sources: [Square Corner Blog RSS Feed](<https://devfeed.tech/sources/square-corner-blog-rss-feed.md>)

Topics: [Ruby](<https://devfeed.tech/topics/ruby.md>), [Programming](<https://devfeed.tech/topics/programming.md>), [Programming language](<https://devfeed.tech/topics/programming-language.md>), [TypeScript](<https://devfeed.tech/topics/typescript.md>), [C#](<https://devfeed.tech/topics/csharp.md>), [PHP](<https://devfeed.tech/topics/php.md>), [Python](<https://devfeed.tech/topics/python.md>)

Tags: [3](<https://devfeed.tech/tags/3.md>), [c-sharp](<https://devfeed.tech/tags/c-sharp.md>), [command-line](<https://devfeed.tech/tags/command-line.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [feature](<https://devfeed.tech/tags/feature.md>), [incremental](<https://devfeed.tech/tags/incremental.md>), [language](<https://devfeed.tech/tags/language.md>), [php](<https://devfeed.tech/tags/php.md>), [programming](<https://devfeed.tech/tags/programming.md>), [programming-languages](<https://devfeed.tech/tags/programming-languages.md>), [python](<https://devfeed.tech/tags/python.md>), [ruby](<https://devfeed.tech/tags/ruby.md>), [typescript](<https://devfeed.tech/tags/typescript.md>)

## AI overview

The article announces RBS, a type signature language planned for Ruby 3. RBS is intended to provide a foundation for type-checking tools, ship with Ruby 3 alongside standard-library signatures, and make type definitions portable between type checkers.

## Source excerpt

Introducing RBS, Ruby's new type signature language