jspahrsummers - Overview

About me

Hi, I'm Justin! đź‘‹

I'm currently doing independent game development as @fernforestgames.

Previously, I worked at Anthropic PBC, where I was involved in developing and launching the Model Context Protocol. Before that, I was at various other companies—notably Meta and GitHub—and did some independent consulting as well.

In a past life, I contributed significantly to some open source projects in the iOS and macOS ecosystem:

  • ReactiveCocoa: reactive programming in Swift and Objective-C
  • Mantle: a model framework for Cocoa
  • Squirrel: robust software update framework for Mac apps
  • Carthage: a decentralized dependency manager

I may not be able to respond to pings and reachouts—sorry in advance.