Conrad Irwin

Run a few agents in parallel, and the filesystem starts to fill up. Branch names accumulate. Somewhere in there are changes you're fairly sure mattered... to someone. Conrad Irwin on escaping the tyranny of Git worktrees: delta.dev/blog/escapin...

Who called it Latin Dance for Beginners instead of Salsa Verde

Just realized that Go’s unconventional capitalization scheme helps them avoid associated methods. func NewFile() *File Hard to get away with that unless your functions and types are in the same namespace

Feeling like the code deleter in chief.... Raw Sol diff +4k lines; post-Conrad diff, +1k lines. Anyone else feeling this?

Claude, please flip the direction of the image (but keep the text left-to-right)

zed.dev/blog/introducing-delta Can finally tell people why I haven't been on top of vim mode in Zed recently... Modal editing -> model editing

Beginning to wonder, what comes after code review?

Why does dieting cause LLMs to become forgetful? Weight loss

Although agentic coding makes it easier to make large changes; It's so time consuming to keep prompting it to make the small refinements that keep code quality good... Guess that's why they call it a #slopmachine

If you're in Seattle this evening, I'll talking at the Seattle Rust User Group bsky.app/profile/zed....

If you're in SF, I'll be speaking at Bay Area Rust this evening! bsky.app/profile/suns...

zed.dev/blog/not-bui...

In case somebody missed this with all the AI thingy and world news. The 2nd edition of the best (imo) software engineering book has been recently released. Thanks for the gem, @martin.kleppmann.com

There are so many juicy quotes in this www.b-list.org/weblog/2026/....

This: calpaterson.com/deps.html. And also deleting dependabot.

Fun thing about watching agents write rust is learning new weird features. If you can't put your files in the right place, no problem!

Sometimes it's easier just to work around the limitations of your tools. Last Q in this survey...

Wouldn't be a day of the week that ends in "day" without GitHub having problems.

Kotlin read my blog post! cekrem.github.io/posts/kotlin... vs cirw.in/blog/typescr... :D

ploum.net/2026-01-22-w...

What idiot called it vibe coding and not prayer programming

I think I have to approach LLMs in the same way I approach guns: - expands agency - Changes social dynamics - Complicated to talk about

How do cats structure multi-threaded programs? With a mew-tex

@cirw.in I just watched your talk "Rendering at 1 million pixels / millisecond with GPUI". It is really great! One of the best this year! #eurorust www.youtube.com/watch?v=sheI...

How did I miss that someone figured out fully linear time lookaround matching for regexes! aurele-barriere.github.io/papers/linea...

A friend shared a lovely Dijkstra essay. It's short enough to read in a few minutes, and is damning of the current attempt to replace our brains with AI generated writing and vibe coding. www.cs.utexas.edu/~EWD/transcr...

hate it when programs present you with a text input and it's NOT READY FOR YOU TO TYPE IN — like wdym?? I'm a meatbag full of water! You're a monster running at 4.5 GHz!!! How am I waiting on you!

i think rust teaches us to fear dynamic dispatch because it looks ugly to box dyn, but my hottest bevy take is that we haven’t yet begun to fully explore the potential of function pointers in components

I've been running stable since I left @zed.dev but this one got me downloading preview to get early 🤩 nice @cirw.in github.com/zed-industri...

Anyone with a complicated set of GitHub Actions YAML files have ideas on a good structure to avoid insanity? Seems like "put all the scripts into .sh" files is a good start; but the whole lot is quite tangled Asking for a friend... github.com/zed-industri...

I collaborated with @cirw.in at EuroRust to make a Zed extension for Roto! It's based on the tree-sitter grammar and supports syntax highlighting and generating an outline. It can be installed via Zed's regular extension manager. Thanks @cirw.in! cc @nlnetlabs.bsky.social #rust #rustlang

And the first day of #eurorust25 wraps up with some amazing story time with Conrad Irwin (@cirw.in) talking about software, speed and how it all affects human experience! 🔃🤌🏼👏🏼

My voice-to-text model just transcribed "stack of abstractions" to "stack of obstructions". I guess it's the same. 😭

What if typescript was right about union types...? cirw.in/blog/typescr...

A better for loop? cirw.in/blog/for-yield

🦀 Talk by @conradirwin.bsky.social, Software Engineer at @zed.dev Modern computers are fast, but modern software rarely pushes them to their limit. Conrad will share how Zed’s GPUI can render a new frame to the entire screen every 8ms. Book your ticket ➡️ eurorust.eu/talks/render...

Makes sense! Also reminds me of this classic: pages.cs.wisc.edu/~remzi/Naur....

Finally figured it out well enough to write it down. zed.dev/blog/why-llm...

Who says AI can't build amazing things... www.windowswen.com

I first wrote up the idea for this 6 years ago, but it took a huge amount of work to actually turn it into reality. Thank you to Orion for the heavy lifting, and all the other Automerge contributors for making it happen!

Are there any statically compiled languages with a typescript-like type system (that can use values in types)? I love rust's exhaustive enum's, but I don't love that they're not just structs, and so you *have* to use a match statement to extract values instead of if…

In the modern world, we should refer to it as "unplugging a flower", not "picking" one.

Finally added `U` to Zed's vim mode; Closing in on being able to complete vimtutor. Only a few things left: * `%` matching in plain-text files * :set ic * :<range>w * :r <filename> !!!

I've (finally) written up the spec for CONL Schema conl.dev/schema.html (next steps publish the language server so it's useful; but feels nice to have found a *significantly* simpler model than JSON schema)

Exciting times! blog.superhuman.com/superhuman-i...