Hi, I'm Justin! 👋
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.






