Andrew Harvard (@aharvard) profile picture

Andrew Harvard

@aharvard

principal design engineer, design intelligence and infrastructure @blocks

 Knoxville, TN
andrewharvard.com
Joined July 2009
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Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)Photo by Andrew Harvard (@aharvard)
block.github.io/goose/blog/2…
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the new version of @buzzdotxyz is built on top of an excellent plugin architecture, my mind is 🤯 so many ideas...
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in this demo, I show a plugin that visualizes data on the buzz relay
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a "creative" plugin example, dumb holiday themes... feels like we've entered an era of moldable software
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Introducing the Governed Artifact Protocol, an open protocol for keeping context with content across systems and teams. block.github.io/governed-art…
Governed Artifact Protocol

Governed Artifact Protocol

An open protocol for keeping context with content across systems and teams.

block.github.io
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block.github.io/governed-art… @writesdavid and I elaborate more in ^ post about our recent work at @blocks and why we think this idea is important.
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The spec is early, but we think it's ready to share. We're seeking community input to strengthen it. Please connect with us if interested!
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working on some @goose_oss display mode updates for MCP Apps...
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we've supported `fullscreen` for a while now
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wanna pop some bubbles? hook up this MCP server as an extension in goose: mcp-bubble-wrap.onrender.com…
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we're actively exploring `split-right` and `split-bottom`
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`split-right` and `split-bottom` are non-standard display mode values but i think we should prob add them to the spec github.com/modelcontextproto…
ext-apps/specification/2026-01-26/apps.mdx at main · modelcontextprotocol/ext-apps

ext-apps/specification/2026-01-26/apps.mdx at main · modelcontextprotocol/ext-apps

Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers - modelcontextprotocol/ext-apps

github.com
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so cool to see Jev used to pick the right LLM for the prompt… I can imagine how this compositional approach has the potential to make client-side agentic UX a lot better (and more economical too)
Alex Hancock (@alexjhancock) profile pictureAlex Hancock
@alexjhancockSep 18
Experimentation with Jev from @typesafeai and our harness @goose_oss Use Jev to take a prompt and JIT select a model just before the turn runs. Jev and models like it will be useful in many areas and this is just early prototype code on a first idea
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Hell yeah!
Wes Bos (@wesbos) profile pictureWes Bos
@wesbosAug 21
I added a a stick shift to my computer. It's like Raycast but for truckers. Window management, LLM Model selection, Shift up/down for reasoning levels. It feels right
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Andrew Harvard retweeted
Wes Bos (@wesbos) profile picture
Wes Bos
@wesbosAug 21
I added a a stick shift to my computer. It's like Raycast but for truckers. Window management, LLM Model selection, Shift up/down for reasoning levels. It feels right
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Andrew Harvard retweeted
Morgan Martin (@_morganmartin) profile picture
Morgan Martin
@_morganmartinAug 18
Today we're open sourcing Berd, a beautiful desktop app for working with AI agents. And one that isn't afraid to have a personality. We had capable models and harnesses everywhere, but no environment around them that we actually loved opening every day. So a small team built one for ourselves, and it's scaled to something a huge portion of Block now uses. Especially the non-engineers who want to build things. The part I'm proudest of is how it was built. Design and engineering as one team. Designers in the code and engineers in the design decisions. Everyone owning what they're working on; everyone moving together like it was choreographed...and really fast. In a world where anyone can build anything now, what makes something worth opening every day is the care inside it. Berd is for people who want to step outside the norm a little. Who want their solo workspace to feel fun, and who want AI to feel less scary and confusing. Model-agnostic, harness-agnostic, and built for you to shape your own AI world. From us, to you.
Block (@blocks) profile pictureBlock
@blocksAug 18
Replying to @blocks
From Square to Cash App, we have a history of bringing thoughtful design to technical categories. With Berd, we brought that same instinct to AI agents. Meet the Gloopies, designed to make agents more recognizable and approachable.
Image from Block (@blocks)
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MCP, ftw!
Conrado Brenna (@cbr4444) profile pictureConrado Brenna
@cbr4444Aug 6
Square sellers can now accept agentic orders from Google’s Ask Maps. And we’re just getting started. More to come. squareup.com/us/en/press/ask…
Image from Conrado Brenna (@cbr4444)
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Agentic commerce at @blocks is powered by MCP Apps investors.block.xyz/investor…
Square Introduces New ChatGPT and Claude Integrations, Helping Sellers Reach Customers Through...

Square Introduces New ChatGPT and Claude Integrations, Helping Sellers Reach Customers Through...

Eligible sellers can participate with no additional technical setup or added Square marketplace commissions Square today announced a new ChatGPT app and Claude plugin, helping sellers get discovered...

investors.block.xyz
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We used @goose_oss to dogfood this experience. That help create the MCP Apps spec. That enabled the birth of agentic marketplaces like ChatGPT Apps and Claude Connectors... a full circle moment here of the goose chasing it's tail
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this is where it all started: nitter.gq/cbr4444/status/1955015…
Conrado Brenna (@cbr4444) profile pictureConrado Brenna
@cbr444411 Aug 2025
MCP UI unblocks agentic commerce. Quick mockup on how we plan on bringing this to our Square sellers: youtube.com/watch?v=iOm_NgYu… @blockopensource
Square Agentic Commerce Demo - Edo Japan

Square Agentic Commerce Demo - Edo Japan

Quick demo of ordering at a Square seller via ChatGPT.

youtube.com
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