Modern workflow orchestration for data and ML engineers. Get the code: github.com/prefecthq/prefect Chat in Slack: prefect.io/slack
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still recovering from 4 days at dbt summit? same.
thanks to everyone who spent time with us in las vegas. whether you stopped by to chat about one of our three products, created a custom hoodie, or dug into agentic workflows with our team, we’re glad we got to see you.
the dbt community made our booth the place to be. we’ll see you next year.
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when you least expect it, JLo comes at you lightning fast with a new python library 🐍
Jev is amazing: fast, simple, and powerful.
So I built a Python DSL to match.
Introducing ✨✅ vibecheck.
Four functions that drop decision models right into your code: check, classify, label, and score.
github.com/jlowin/vibecheck
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Prefect retweeted
A Python representation of a UI turns out to run about 70% smaller than the equivalent JSON, a detail that changed how an entire framework streams interfaces over the wire. @jlowin, founder and CEO of Prefect and creator of FastMCP, walks through that discovery in "Generative UI... in Python?", on @aiDotEngineer's YouTube. The talk lays out a working pattern for shipping interactive UIs from an MCP server without writing JavaScript.
- MCP apps skip the agent's context window. Normally an MCP tool's result goes back into the agent, but MCP apps let a tool send HTML, CSS, and JavaScript straight to the user instead, so they can search, sort, or click through it directly.
- Prefab, a Python DSL for UI. Jeremiah's team built it so Python engineers can compose interfaces from roughly 130 to 140 pre-built components using nested context managers, without touching React.
- JSON underneath, Python on top. The DSL builds a declarative UI that serializes into a JSON protocol and renders through a React app, which is why adding a pie chart next to a data table is a one-line change.
- Three ways to use it. An interactive tool that returns a Prefab component instead of a dictionary, a full FastMCP app built from app.ui and app.tools methods, and a generative UI where the agent streams the interface live as it renders.
- The upload problem. Since only the agent can talk to an MCP server, teams ended up having the agent retype uploaded files character by character; a built-in upload component lets a file go straight from the browser to the server instead.
- Python beat JSON on the wire. Once Jeremiah's team saw how much smaller the Python form was, FastMCP switched to streaming Python directly and converting it to JSON server-side, for a real token and latency win.
I'm working through the published talks from AI Engineer World's Fair sharing summaries and takeaways. Follow for more!
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a custom keyboard is heading home with elliot davis 🐍
congratulations to elliot, director of data strategy at @AACSB on winning our dbt summit raffle and a custom python keyboard built by @goblintechkeys
thanks to everyone who entered and stopped by to see us this week. elliot, we’d love to see it on your desk ⌨️
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straight from dbt summit 2026: we asked our floor reps what customers wanted to talk to them about.
watch what they heard about ai agents, data freshness, and mcp servers last week in vegas. 👇
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you can now ask chatgpt or claude what’s happening in prefect cloud.
prefect is live in the chatgpt plugin directory and the claude connectors directory.
once connected they can use your prefect workspace and current documentation to answer questions about your workflows directly from the conversation.
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you're a fun crowd dbt summit.
thanks to everyone who came to our welcome party afterparty at alexxa’s in paris las vegas. food, music, prizes, and a lot of dancing.
shoutout to our saasquatch for wearing considerably more layers than vegas calls for.
day 2 starts soon. come say hi!
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a great post by @Theoryvc! They’ve spent a year building an mcp-powered company brain and share what it takes to make it dependable enough for daily work.
plenty of useful detail on where agents get stuck and how better tool design helps, including a look at fastmcp's background tasks for long-running work.
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dbt Summit by @getdbt is in full swing! we’re here as a platinum sponsor at booth 321. just follow the smell of pancakes and you'll find us 😋
we’ve got plenty of folks from the team here to chat and demo Prefect, @dagster , and @fastmcp. only stopping by for a hoodie and snacks? We’d still love to see you.
here's what you can find at our booth:
🧥 feeling cold? grab a plain hoodie, choose some patches, and we’ll heat-press them on the spot.
🥞 feeling hungry? stop by the dagster food truck for mini pancakes, fresh off the griddle.
⚡ need a pick-me-up? head to the fastmcp refuel station for electrolytes and a sweet treat.
if you’d like to book 1:1 time with us at the conference, the link is in the 🧵
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Prefect retweeted
MCP Community Connect – San Francisco: what a day. 🎉
Hosted at GitHub HQ, we spent a full day going deep on the Model Context Protocol, from building and securing MCP servers to where agent-to-agent interoperability is headed next.
Massive thanks to our incredible lineup of speakers who brought the energy and the expertise @TobinSouth
@digitarald @sofiiiiiasz @ptdamiba @dbreunig @JiquanNgiam @PrathmeshPatel_ @radhigulati @cedricvidal and more/
Thanks to partners @PrefectIO @WeAreDevs @github and @Microsoft for making it possible.
And of course, none of this happens without the person who opened the day and quietly holds this community together every single time @pamelafox 💙
Want to relive the day or see what's next? Check out the full photo gallery and explore more upcoming. Link in the comments 👇
#GlobalAICommunity #MCPCommunityConnectSF
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MCP Community Connect SF is a wrap!
Here's a quick collage of the presentations from today. Themes: evals, reliability, cross-client differences, new features.
Basically: MCP servers are here to stay - so how do we improve both the agent and user experience when using them?
ALT Collage of MCP talks
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Prefect retweeted
i tried to fit four versions of fastmcp into a 10 minute talk last night (it ended up being 15) 😅
yesterday’s mcp community connect event brought people together to talk about building with mcp
in my talk, we took a trip down memory lane, revisiting each major version of fastmcp to see how it’s changed the way we build mcp servers, and what’s new in version 4.
thank you to everyone who came up to chat afterward. hearing what you’re already building with fastmcp, what you like about it, and what you’re excited to try made my night.
huge shoutout to @pamelafox and liam hampton. thanks for letting me take the stage to talk about @PrefectIO fastmcp ❤️
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FastMCP is broad on purpose, and it just got broader. Python, and now TypeScript.
Prefab is narrow on purpose. It turns what your tool returns into an (actually very fun) interface. A sortable table where you used to get a wall of JSON. A chart with tooltips. A drop zone you drag a file into, which spares your agent from copy-pasting every byte of it through the model. 100+ components, all client side.
Wide framework, narrow tool. Both on purpose.
Both so we can get to the fun part.
Check out Jeremiah's @jlowin full Prefab talk, hosted by Liam Hampton @liamchampton and Pamela Fox @pamelafox on Microsoft Reactor's MCP Live! Link to the event and talk below ⤵️
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MCP Live hosted by @pamelafox is happening right now! Tons of great talks still to come including @jlowin 's "Building MCP Apps with FastMCP."
Join the livestream now: piped.video/watch?v=uydwDk91…
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7 days until dbt Summit 2026 🎲
We’re kicking things off Tuesday night with our welcome party after-party at Alexxa’s at Paris, where everyone is a winner 😉
For the rest of Summit, find Prefect, Dagster, and FastMCP at booth #321. Looking for a snack, need an extra layer, seeking an energy boost, or questioning your orchestration life choices? We’ve got you covered.
Links to RSVP and book time with us in the comments. 👇
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