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San Francisco Bay Area & Silicon Valley Haskell Hackathon

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Come join a group of Haskell hackers to work on a wide variety of projects. All levels welcome.

Sign-up Here:
BayHac '14 Attendee Form

Special thanks to IMVU, Google, Aleph Cloud and Twitter for sponsoring BayHac '14!

When: Friday, May 16th – Sunday, May 18th, 2014
Where: Hacker Dojo
Cost: Free
News and Discussion: BayHac Google Group

BayHac14 Poster Small.png
Full size PDF poster available


Hacker Dojo, 599 Fairchild Drive, Mountain View, CA (Google Map)


Basic timing... details to be developed. Expect lightning talks, hacking, and other activities:

Friday, May 16th 3pm - 7pm
Saturday, May 17th 10am ~ 7pm
Sunday, May 18th 10am - 4pm



  • 5:15pm - 6:15pm Programming with Pipes by Gabriel Gonzalez (Large Room) — slides
  • 6:15pm - 7pm A Tutorial on Free Monads by Dan Piponi (Large Room) — video



Saturday Demos and Experience Reports (Large Room)

1pm - 2pm

  • Haskell at IMVU by Andy Friesen
  • Haskell at Aleph Cloud by Jeff Polakow
  • Haskell at Docmunch by Greg Weber
  • Haskell at Pingwell by Tim Sears
  • demo by Luke Iannini

Lightning Talks

  • Aaron Wolf - FLO fundraising built with Yesod
  • Harold Carr - a Haskell Bitly Client using Template Haskell & Aeson
  • Tad Doxsee - PlanIt9: Learning Web Programming via Haskell (pdf)
  • Paul Ivanov - IHaskell Notebook
  • Ben Burdotle - Cyclophone
  • John Millikin - The "options" package
  • Jon Sterling - Vinyl
  • Conal Eliott - Haskell to HW



  1. TreeViz - a computation breakdown visualization project hosted by David Banas
  2. Haskell Platform, the new build - We are working on a new build system for all of Haskell Platform: Generating tarballs, installers, and even the web site from one single Shake based build tool. Lots to do! See Mark Lentczner.
  3. lambda-ccc - a project for compiling Haskell to hardware. I'm doing this work for my day job, but the development is open, and the result will be shared freely. The project starts with a GHC plugin that transforms Core in order to generate a convenient-to-manipulate GADT representation of the original. Then convert to an Arrow-like algebraic interface that can be interpreted in various ways, including as circuits. See Conal Elliott.
  4. see what Template Haskell generates. For those interested in hacking on the GHC compiler, see Greg Weber
  5. — a community-engagement and fundraising platform strictly for Free/Libre/Open projects, built on Yesod; Head developer David Thomas and co-founder (and Haskell beginner) Aaron Wolf will be on hand. We have a wide range of projects at different levels and sizes to hack on.

IRC channel

We'll be hanging out on #bayhac on FreeNode.