Agent Skills started as an experiment in Claude Code. Many across the industry have come to adopt it, so we at Anthropic found it more fitti...

Don't sleep on Claude Slides. This is how I make slide decks now -- no more googling "iphone frame svg" like the old days Try it: https://c...

I could not imagine being productive without Claude Code Review. It runs on all of my PRs, and catches almost every bug before it goes it. T...

Over the last few years, we have made significant progress on prompt injection for Claude models. As agents do more, it is increasingly urge...

Haiku 5.5 is a good Haiku. With 100k token context, it's also 10x cheaper than Haiku 4.5 https://twitter.com/claudeai/status/21078940396262...

I am surprised that people are surprised this is how I prompt Claude. Talk to Claude the way you would a coworker. There's no secret to pro...

I asked Opus 5.5 to make an interactive website companion for the latest @AcquiredFM Home Depot episode. It came out pretty nice! Water col...

Mods are absolutely insane. You can now customize Claude to work and look the way you want by just prompting it. Each person works differen...

Sonnet 5.5 fixing a bug with Claude Code. 30% faster and 30% less usage. https://x.com/bcherny/status/2104638725317923228/video/1 https://t...

Tag writes >50% of my PRs every day. It also does ~100% of my data analysis, and fixes most of our product feedback + bugs. It's not like a...

It was an honor to meet Donald Knuth at the Computer History Museum today

If you've noticed how fast https://claude.ai and the Desktop app have become in the last few weeks, here's how we did it. Lots of juicy le...

I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions....

Opus 5.5 is a really good model. It's been my daily driver the last few weeks. We had Opus 5.5 and Fable 5.1 each port HAProxy from C to Ru...

Projects have changed not only how I interact with Claude but how I code. I stopped managing sessions. I just send thoughts as they come, C...

Projects are how I write a lot of my code these days. Really excited for everyone to try the new experience! Rolling out now https://twitter...

Also today: Claude Docs, Claude Slides, and Claude Design are in every conversation. Ask Claude for a presentation and you get one you can ...

Claude Code showed that AI could do real work, not just answer questions. Developers hand Claude a feature, come back to shipped code. That'...

Claude Mods are landing now. Someone already built a Tetris-in-Claude mod 🤯 See issue for the latest community update, technical details, ...

Fable solved the Cyphral Distich (a 370 year old cypher). Super cool way to use Claude https://www.vals.ai/blogs/fable-solves-cyphral-disti...