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rattray

6,558 karma · joined February 25, 2012

member of technical staff, anthropic

views my own (if that), etc.

previous:

- founder, stainless.com

- engineer, stripe

https://linkedin.com/in/alexrattray

submissionscomments
rattray··on Introducing System One Models and Jev
Super cool. Does it, or will it, work with image, audio, or video input?
rattray··on Introducing System One Models and Jev
Open weight or even closed with a proprietary license, I'd definitely like to be able to run it locally for all sorts of physical world stuff.
rattray··on JetKVM Mini
Got it! So I could for example plug this into my mac mini at home and reboot it after a power failure or something while traveling?
rattray··on JetKVM Mini
I've never entered a datacenter before – what does that mean / what is it for?
rattray··on JetKVM Mini
I feel like I should know this, but can anyone ELI5 what a KVM is in this context?
rattray··on Muse Spark 1.3
Is this for real
rattray··on Stripe acquires Clerky
I've used https://delawareinc.com/ to incorporate several companies over the years, and always had a good experience. Their website looks pretty old-school but it works well and their service is very prompt.

So I wouldn't Stripe controls all of the early incorporation infrastructure – just the flashy stuff (which I'm sure is great too).

(disclaimer: former Stripe employee)

rattray··on Claude Fable 5: mid-tier results on coding tasks
I think that gets you access to mythos, which doesn't have the safeguards. It's configured as a separate model.
rattray··on Green card seekers must leave U.S. to apply, Trump administration says
GP seemed to be commenting on the Trump administration, not necessarily individuals of conservative persuasion. The Trump administration diverges materially from traditional conservative doctrine in many ways.
rattray··on Anthropic acquires Stainless
> ... and their team is joining Anthropic to build, who knows, some dumb integration to make Hubspot data available in Claude, or something equally as boring.

Fun fact, I named it "Stainless" after Stainless Steel pipes, likening ourselves to a high-end plumbing supply shop. If you look at the earliest versions of stainlessapi.com on archive.org, you'll see our original motto was "Quality fittings for your REST API".

All that is to say, the incredibly "boring" infrastructural work of making "boring" APIs like Hubspot's more usefully accessible is absolutely the kind of thing I'm excited to do at Anthropic :)

(It also happens to be what got us all excited to work at stainless in the first place, but of course, we understand it's not for everyone!)

rattray··on Anthropic acquires Stainless
Aww, well this thread is a nice surprise :) thanks for the kind words!
rattray··on Anthropic acquires Stainless
TypeSpec is awesome!!

(disclaimer: founder of Stainless and also friends with creator of TypeSpec)

rattray··on Anthropic acquires Stainless
darn! anything else i missed?
rattray··on Fecal transplants for autism deliver success in clinical trials
Hmm, that's one explanation, but I'm curious what leads you to believe it's the correct one?

I'm struck by this quote, which I'd be surprised if they could be explained fully by the distraction-reduction mentioned:

> "Evaluation of symptoms on the Parent Global Impressions found that the treatment group at the end of part 2 improved more than the placebo group in part 1 on nearly all symptoms, with statistically significant improvements in GI, receptive language, and average of all symptoms. There were also marginally significant improvements in tantrums, stimming/perseveration, and cognition."

rattray··on Fecal transplants for autism deliver success in clinical trials (2019)
> Prior to the study, 83% of participants had "severe" autism. Two years later, only 17% were rated as severe, 39% as mild or moderate, and incredibly, 44% were below the cut-off for mild ASD.

Pretty incredible if true!

rattray··on Bun Rust rewrite: "codebase fails basic miri checks, allows for UB in safe rust"
> why not just build a translation tool for it?

They did ;) a highly dynamic one...

rattray··on Using Claude Code: The unreasonable effectiveness of HTML
It's possible that use of `contenteditable` and ability to save the file could help but that has a lot of limitations/gotchas, so I'm inclined to agree.
rattray··on Agents can now create Cloudflare accounts, buy domains, and deploy
Cool! How'd you build it / what made it work so well?
rattray··on The USB Situation
Aren't there high quality cables available? Eg from companies like Apple or Anker?

I struggle to understand why an Apple lightning cable would be more robust than an Apple thunderbolt cable...

rattray··on Google banks on AI edge to catch up to cloud rivals Amazon and Microsoft
https://archive.ph/U7i8q
rattray··on GPT-5.5
I've been very curious about that too. I wonder if it's actually much better at admitting when it doesn't know something, because it thinks it's a "dumber model". But I haven't played with this at all myself.
rattray··on jj – the CLI for Jujutsu
Has anyone tried both jj and gitbutler extensively yet? Both seem to have some interesting new ideas on top of git.
rattray··on jj – the CLI for Jujutsu
What's your naming scheme?
rattray··on Lisette a little language inspired by Rust that compiles to Go
Abandoned open-source projects with poor code quality are nothing new.

The merits of any project are yours to evaluate.

To me, I see some encouraging thoughtfulness here. However, again, it's true most projects like this don't achieve liftoff.

rattray··on Lisette a little language inspired by Rust that compiles to Go
This seems awesome. Seems to address many of my armchair complaints about both Go (inexpensive) and Rust (bloated/complex).

I'm curious what compilation times are like? Are there theoretical reasons it'd be order of magnitude slower than Go? I assume it does much less than the rust compiler...

Relatedly, I'd be curious to see some of the things from Rust this doesn't include, ideally in the docs. Eg I assume borrow checking, various data types, maybe async etc are intentionally omitted?

rattray··on Pretext: TypeScript library for multiline text measurement and layout
Some details on how it works from a code comment:

Problem: DOM-based text measurement (getBoundingClientRect, offsetHeight) forces synchronous layout reflow. When components independently measure text, each measurement triggers a reflow of the entire document. This creates read/write interleaving that can cost 30ms+ per frame for 500 text blocks.

Solution: two-phase measurement centered around canvas measureText.

prepare(text, font) — segments text via Intl.Segmenter, measures each word via canvas, caches widths, and does one cached DOM calibration read per font when emoji correction is needed. Call once when text first appears.

layout(prepared, maxWidth, lineHeight) — walks cached word widths with pure arithmetic to count lines and compute height. Call on every resize. ~0.0002ms per text.

https://github.com/chenglou/pretext/blob/main/src/layout.ts

rattray··on Pretext: TypeScript library for multiline text measurement and layout
Regardless of the subject matter, the tweets announcing this are a masterclass in demoing why an architectural/platform improvement can be impactful.
rattray··on GPT‑5.4 Mini and Nano
Wow. How fast is haiku?
rattray··on Big Data on the Cheapest MacBook
> For our first experiment, we used ClickBench, an analytical database benchmark. ClickBench has 43 queries that focus on aggregation and filtering operations. The operations run on a single wide table with 100M rows, which uses about 14 GB when serialized to Parquet and 75 GB when stored in CSV format.

very much so…

rattray··on Apple's 512GB Mac Studio vanishes, a quiet acknowledgment of the RAM shortage
Curious, what do you use it for?
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