Delved into Cursor 3.0 -- turns out there's some interesting shenanigans going on.... "The most newsworthy finding is that "Cursor Agent" is a rebranded Claude Code running behind a local proxy with a find-and-replace engine that swaps "Claude"→"Cursor" in system prompts and mes…↗

We're launching 21st Agents in beta. It's the infrastructure layer for Claude Agent SDK - runtime, sandboxing, billing, UI, streaming - so you can ship agents to production without building infra from scratch. Think Vercel for Claude Agent SDK. Full walkthrough in the video be…↗

Xcode 26.3 launched today with a native integration with the Claude Agent SDK, the same harness that powers Claude Code. Devs get the full power of Claude Code (subagents, background tasks, and plugins) for long-running, autonomous work directly in Xcode 🤖 …↗

fyi: you can build your own claude cowork style apps with claude agent sdk! i’ll be open sourcing my app this week. i’ve been hacking on it for a while, and i think it’s actually really good! this app format will be the ai app-layer trend of the year. watch for a 4min demo.↗

The easiest way to prototype a general agent is to use Claude Code. Write some scripts to access your APIs, write a custom Claude MD, then prompt Claude Code with some queries. Does it work? Use the Claude Agent SDK to productionize it.↗