John OBrien

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John OBrien

John OBrien

@JOBrienSF

Founder, @SBS_Comms. Investor. 🗽

Katılım Mayıs 2008
6K Takip Edilen1.2K Takipçiler
John OBrien retweetledi
Pay Roll Manager Here
Pay Roll Manager Here@UsingLyft·
He’s typing in a search bar, quick show him the search option he’s looking for. Perfect. He typed the next letter that is also the next letter in the option we just showed him so take that option away and show him an option that doesn’t match at all
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Cursor
Cursor@cursor_ai·
Introducing Composer 2.5, our most powerful model yet. It's more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. For the next week, we’re doubling the included usage of the model.
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Sualeh Asif
Sualeh Asif@sualehasif996·
A conversation with @sirupsen on scaling Shopify, building turbopuffer, and the future of databases. 0:00 - Scaling Shopify through flash sales and outages 8:13 - How top infrastructure teams collaborated in the 2010s 10:35 - Engineering principles from Logrus and on-call 17:38 - The story behind Simon’s famous-ish blog, Napkin Math 23:05 - Why new database companies keep winning 32:21 - How Simon became a fan of databases 35:45 - AI coding, and where agents still fail 42:10 - Hiring P99 engineers in the AI era 48:45 - What’s next for databases
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Michael Truell
Michael Truell@mntruell·
Excited to partner with the SpaceX team to scale up Composer. A meaningful step on our path to build the best place to code with AI.
SpaceX@SpaceX

SpaceXAI and @cursor_ai are now working closely together to create the world’s best coding and knowledge work AI. The combination of Cursor’s leading product and distribution to expert software engineers with SpaceX’s million H100 equivalent Colossus training supercomputer will allow us to build the world’s most useful models. Cursor has also given SpaceX the right to acquire Cursor later this year for $60 billion or pay $10 billion for our work together.

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Altimeter Capital
Altimeter Capital@AltimeterCap·
Brad's (@altcap) advice to the next generation: "Being the smartest person and solving the problem faster than every other human — that gets commoditized. You're not going to beat the machine." Network. Persuasion. Leadership. Make yourself bionic.
Altimeter Capital@AltimeterCap

Jensen told Brad (@altcap) on his @BG2Pod: "We've gone from pre-training to inference time reasoning. Inference is about to 1 billion X." Not 10x. Not a million x. A billion x. And our compute systems weren't built for it.

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Cursor
Cursor@cursor_ai·
We partnered with University of Chicago economist @SuproteemSarkar to study how more capable models have changed the way people use Cursor. Across 500 teams, we find that developers are tackling more ambitious work with AI, with a 68% increase in high-complexity tasks this year.
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Cursor
Cursor@cursor_ai·
Use Design Mode in Cursor 3 to annotate and target UI elements in the browser.
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SBS Comms
SBS Comms@sbs_comms·
Q1, in headlines. 💥 Top-tier placements, broadcast hits, and a few 'did that really just happen?' moments for our clients. More where that came from. 👀
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Cursor
Cursor@cursor_ai·
We’re introducing Cursor 3. It is simpler, more powerful, and built for a world where all code is written by agents, while keeping the depth of a development environment.
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SBS Comms
SBS Comms@sbs_comms·
11 SBS clients just landed on @FastCompany’s 2026 Most Innovative Companies list 🚀 Our biggest showing ever – from AI to finance to media, our clients are building what’s next. Big congrats to all 👏
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Justin Schroeder
Justin Schroeder@jpschroeder·
This is a much bigger deal than most people realize. If you don't know why, let me explain. Agents perform "work" right now by calling "tools". These are just pieces of context shoved into the context window saying "if you think you the next thing you should do falls into one of these categories, then respond with this format" — that format is the "tool" a JSONSchema response which a harness then uses to call a function. MCP, is best thought of as a way to shove more tools and context into your context window (it has a lot of shortcomings imo). The agent then has to pick which tool out of all the available tools it should call. So the more tools you have, the worse it selects the tools. @threepointone and @KentonVarda have an excellent article (blog.cloudflare.com/code-mode) where they introduced the idea of exposing the MCP tools as an SDK, so to call tools and compose them, the AI just does what it is ALREADY good at: write some code. The question, as always, is where do you run that code safely. Many have proposed sandboxes and containers as a possible solution, but these are hella slow and make the experience untenable. Thats what makes this announcement SO important, it allows you to run agent-written code in a matter of milliseconds with the explicit execution environment you specify pulled in (like a database, kv store, etc. Cloudflare calls these "bindings" btw). In practice, this means people can start building MUCH more effective agents that can *do* a lot more, because they can be exposed to more tools. Anyway, huge deal. Congrats to the CF team.
Cloudflare@Cloudflare

We’re introducing Dynamic Workers, which allow you to execute AI-generated code in secure, lightweight isolates. This approach is 100 times faster than traditional containers. cfl.re/4c2NvPl

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Cursor
Cursor@cursor_ai·
Composer 2 is now available in Cursor.
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Juan
Juan@JuanRezzio·
In the last month, our team at @cursor_ai has delivered incredible features. I might go as far as to say world-changing features. And if you've been paying attention, you might already know that's not an overstatement. For that reason im creating this down-to-earth thread explaining what we released this month, why this is impactful for the way you code, how we use these at Cursor, and how you can start using them today. 🧵 ↓
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