Jeff Kershner

TypeScript without generics is just JavaScript with extra steps. One function. Any type. Zero any. The type travels with your data — all the way from the API call to your component. Your editor autocompletes. Typos get caught at compile time. Refactors become safe. jeffkershner.com/blog/typescrip… #TypeScript #WebDev #WebDevelopment

Expert React/NextJS/FastAPI Python developer thinking about trying out ASP.NET/C# Blazor for a while. Good idea? or Talk me out of it! #Csharp #aspnet #react #blazor @shanselman

The essay is outstanding and warrants a thorough read by all.

I wonder what a technical interview would be at @AnthropicAI Anthropic: code this merge sort and tell me what the big OH is. Interviewer: sure… give me a moment to as Claude Code. Anthropic: you’re hired!

I showed my son how to use the chrome inspector to make changes to a live website's DOM. Now he thinks he changed the live website for everyone! This is how hacking starts...

Hot take: If you're not enforcing type safety across your full stack, shared types between frontend and backend, you haven't felt the pain yet. I've seen what happens at scale: a backend contract changes, the frontend silently breaks, and suddenly you're debugging at midnight wondering why the data looks wrong. A shared type layer (tRPC, OpenAPI codegen, or even a simple shared types package) turns that class of bug into a compile-time error instead of a production incident. This isn't about being pedantic. It's about respecting your teammates' time and your future self's sanity. If you've worked on a real team shipping real features at real velocity, you already know this. If you haven't... you will. #TypeScript #FullStack #EngineeringCulture #SoftwareDevelopment

@sama I’m upping my Claude code max plan subscription with @AnthropicAI

Tonight, we reached an agreement with the Department of War to deploy our models in their classified network. In all of our interactions, the DoW displayed a deep respect for safety and a desire to partner to achieve the best possible outcome. AI safety and wide distribution of benefits are the core of our mission. Two of our most important safety principles are prohibitions on domestic mass surveillance and human responsibility for the use of force, including for autonomous weapon systems. The DoW agrees with these principles, reflects them in law and policy, and we put them into our agreement. We also will build technical safeguards to ensure our models behave as they should, which the DoW also wanted. We will deploy FDEs to help with our models and to ensure their safety, we will deploy on cloud networks only. We are asking the DoW to offer these same terms to all AI companies, which in our opinion we think everyone should be willing to accept. We have expressed our strong desire to see things de-escalate away from legal and governmental actions and towards reasonable agreements. We remain committed to serve all of humanity as best we can. The world is a complicated, messy, and sometimes dangerous place.

I just learned that “vibe coding” is asking AI to write code and shipping without even looking at the code! For real?

@camski Ozempic is not for you.

I’d rather run everyday than take Ozempic

@davepl1968 The shit we did in C in the late 90s (before YouTube, StackOverflow, and LLMs) still blows my mind.

This was an interview question back in the 90s. They expected you to know this.

Fixed a bug where the neondb connection pool wasn't working correctly. Give it a try at pulse.jeffkershner.com

Happy lunar new year!

Peter Steinberger is joining OpenAI to drive the next generation of personal agents. He is a genius with a lot of amazing ideas about the future of very smart agents interacting with each other to do very useful things for people. We expect this will quickly become core to our product offerings. OpenClaw will live in a foundation as an open source project that OpenAI will continue to support. The future is going to be extremely multi-agent and it's important to us to support open source as part of that.

@tymofii @reactjs @Cloudflare @Railway @Finnhub_io Good to know and thanks for sharing!

@kershnerd @reactjs @Cloudflare @Railway @Finnhub_io Thanks for sharing! On the topic: I don't know why, but crypto exchanges have a superior API limits. Usually, it's not a problem to build realtime dashboards for a solo developer, without paying for API. (though they take money for L2/L3 data.)

Playing around with a market dashboard with real-time market data (well free API is 15 min behind). Using @reactjs deployed on @Cloudflare pages, @Railway for the FastAPI and @Finnhub_io for the free API for market data. This is just a fun project if anyone wants to try it yourself.

You can try it out (always for free) at: pulse.jeffkershner.com

My favorite quote from @shanselman : "I can't believe we are getting beat by a bookstore!"

@KalyaniAmbedkar Hello

@MuhammadMusa_89 Hi!