John Sullivan Hamilton is Design Intelligence Lead at Block. His work combines design systems with the interfaces people use to build alongside AI agents, including the team behind the open-source desktop app Berd.[1][2][3]
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X · hams Career
Hamilton’s professional timeline records Design Intelligence Lead at Block from 2025, Head of Design Systems at Cash App from 2021 to 2024, and Design Systems Lead at Netflix from 2020 to 2021. He describes establishing Cash App’s design-system function, team and migration. His earlier work included leading design at A Proper High.[1]
Contributions
Berd puts agent work into a desktop application rather than leaving every artifact in a conversation log. Hamilton’s launch discussion credits design and engineering working together on the experience. The public project uses a Tauri and React interface connected to the Goose backend. It supports a public distribution and organization-specific settings through defined packaging boundaries.[2][3]
Tools, writing & talks
Tools
Start here
Berd
github.comAn open-source desktop environment for working with AI agents and their surrounding context.
Read the public-distribution overview before building it. Running the source requires the documented desktop-development tools and Goose backend setup.
Desktop app for building with AI agents that keeps work and context out of a chat log.
Catalog workOriginal source