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Last Week in Pony - March 24, 2019

Last Week In Pony is a weekly blog post to catch you up on the latest news for the Pony programming language. To learn more about Pony check out our website, our Twitter account @ponylang, or our Zulip community.

Got something you think should be featured? There’s a GitHub issue for that! Add a comment to the open “Last Week in Pony” issue.

Items of note

  • Pony 0.28.0 has been released. It’s considered a high-priority bug fix upgrade, so upgrading ASAP is recommended. More details are available in the release notes.

  • Audio for the March 19, 2019 Pony sync is here.

  • All recordings of Pony development sync meetings going back to the beginning are available without being behind a “paywall”. Check them out at

  • We’re leaving Slack for the greener fields of permanent history on Zulip. Zulip is a lot like Slack so the adjustment should be fairly quick. The biggest difference, you have “streams” and “topics” rather than “channels”. Learn more at and then join us in the new Ponylang Zulip.

  • We’ve shutdown our mailing lists since the traffic was minimal, especially after opening the Slack and later Zulip. The mailing list have been put into a read-only mode so they can be referenced in the future. If you occasionally used a Pony mailing list, we invite you to join us in our much more active Zulip community.

  • Have a fun problem you tackled with Pony? Show off your solution at the next Pony Virtual Users Group. Let us know if you’re interested on Zulip.

News and Blog Posts

  • We’re excited to announce that Josh Horwitz will be speaking at Detroit Tech Watch. Join Josh on a tour through Pony, which will allow you to write fast, safe, efficient and highly concurrent programs.

  • Andrew Turley updated the Pony Cheat Sheet to use the domain, include a Zulip link, show how to do doc strings, and fix an error. Go check it out if you haven’t already.


Interested in making a change, or keeping up with changes to Pony? Check out the RFC repo. Contributors welcome!

Approved RFCs

  • RFC 62 for TCPConnection hard_close