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jacobn

1,876 karma · joined November 2, 2010

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jacobn··on Redesigning source control at Anthropic
or, not of
jacobn··on Find the flattest route between any two points in SF
Not if there are hills in between. But the delta between A and B is the best you can do, yes.
jacobn··on Show HN: Perspica – A semantic diff for reviewing code
Neat! Scala support would be great, thanks!
jacobn··on The Advisory Group on Mathematics and Artificial Intelligence
> This group came together after OpenAI approached some of its members about establishing an external advisory board. In agreement with OpenAI, they decided to create an independent group and invite others to join.
jacobn··on The Amazon tax
The search ads ostensibly solve the cold start problem: If a seller introduces a new product, how is that to be ranked? Well, they can buy some ads, get some ratings, and boot up their sales & search ranking. Great.

It of course also creates essentially perfect competition. Amazon will even tell you the top selling products across categories, so that no seller can make excess profits for long - others will quickly jump into the fray to compete that away.

This is of course the market working as intended - the sellers compete away any and all surplus. Normally that would be a good thing for consumers! Unfortunately the search ad tax is very real, and siphons off a good chunk of the surplus as monopolist rent.

This is all structural. A marketplace like this is a natural monopoly with massive network effects. And the allure of the search ad is irresistible - they literally can't not do it, lest their shareholders rebel.

Google ads work exactly the same way.

As a seller your only options are to either have better conversion economics than the competition (so you can win the ads bidding war - guess why every successful site on the internet is gameified to all hell, and why the amazon listing titles & descriptions look like they do) or to not play.

If you can create a viral hit for a product you can probably eke out excess profits for a few months - people want precisely your branded product and not a cheap knockoff, at least for a while.

("Excess profits" = anything above what will literally make the marginal seller say "it's not worth it", which is a very low bar when competing with the entire world)

jacobn··on How to earn a billion dollars
Make a billion / deserve a billion. Ok.

Given how tech has gone from nerdy underdog to Orwellian, Machiavellian, dopamine-peddling overlord, I’m actually a bit surprised people aren’t more angry / upset.

Over the last 40 years there has been two career paths with “disproportionate leverage”: tech and finance.

I believe in capitalism, contracts and the rule of law. A founder starting a company and attracting capital, employees and customers and generating tremendous wealth I see as an opportunity, not a bug.

But if I were in a normal career the wealth generated by tech & finance would certainly look & feel like some form of cheat code.

The last forty years have been a huge transient. Massive. AI will probably push it even further.

I hope we as a society and democracy can survive the strain.

jacobn··on The American Rebellion Against AI Is Gaining Steam
So far it seems like AI is helping the little guy fight the bills more?

(That can of course change very quickly, yes)

jacobn··on Who will buy your services if you fire us all?
Historically it has fit reality, but yes, this time may well actually be different...
jacobn··on GenCAD
I just ask it for what I’m looking for (doing very simple “spare part” level at home 3d printing, nothing fancy or elaborate) and it gives me a starting point. Then I sometimes just edit the scad code by hand, and some times I ask the AI to revise, sometimes a mix (many iterations).

For very simple geometries it works great, but it very quickly becomes apparent that there’s a bit of a disconnect between “LLM views image” and “LLM emits scad that looks like that image” when it comes to anything non-trivial.

Still gives me a starting point I can mess with, which is great since I have zero CAD training or experience.

(I’m not the commenter you replied to)

jacobn··on Amazonbot is finally respecting robots.txt
I just complained to them the other day! They were scraping our weather website to no end, very much including the disallowed path prefixes.

Did end up just adding them to our WAF blocklist, which is weirdly ironic - hosting on their infra & using their services to block their AI scraper...

jacobn··on Machine Payments Protocol (MPP)
And https://www.x402.org/
jacobn··on Machine Payments Protocol (MPP)
> MPP provides a specification for agents and services to coordinate payments programmatically, enabling microtransactions, *recurring payments*, and more.
jacobn··on NRC issues first commercial reactor construction approval in 10 years [pdf]
Are there any nuclear alternatives that don't include strapping low grade bombs to the reactor core (PRW/BWR: water separation -> hydrogen + oxygen -> boom, like happened @ Fukushima) or using coolants that instantly start violently combusting when exposed to air or moisture (sodium)?

I love the promise of nuclear energy, and I understand that every single engineering decision has tradeoffs, but these tradeoffs just seem so bad? Are there really no better options?

jacobn··on Show HN: AxonML – A PyTorch-equivalent ML framework written in Rust
Cool! How do you actually implement “Reverse-mode automatic differentiation with a tape-based computational graph” in rust?
jacobn··on Dissecting the CPU-memory relationship in garbage collection (OpenJDK 26)
Most web request cases where you care about performance probably have multiple parallel web requests, so there’s no clean separation possible?
jacobn··on Gemini 3 Flash: Frontier intelligence built for speed
Don't the models typically train on their input too? I.e. submitting the question also carries a risk/chance of it getting picked up?

I guess they get such a large input of queries that they can only realistically check and therefore use a small fraction? Though maybe they've come up with some clever trick to make use of it anyway?

jacobn··on Bill Gates-Backed 345 MWe Advanced Nuclear Reactor Secures Crucial US Approval
If there’s an issue with the core then the salt tank can act as a heat sink in a way a battery can’t?

The boiling / pressure water reactors all have requirements on active cooling being maintained in emergencies - I’m not familiar with this design nor to what extent the salt is intended to fulfill such a function, but it’s plausible that it could buffer things for idk 1h-3d maybe?

The holy grail is the “walk away safe” reactor, I would hope / presume all the novel / modern ones fulfill that?

jacobn··on Web Bot Auth
Isn't that how most web standards got their start? One of the interested parties pushed something, then things evolved through the standards process?

(And then it can of course get derailed, but that's a separate story)

jacobn··on Show HN: Octelium – FOSS Alternative to Teleport, Cloudflare, Tailscale, Ngrok
Isn’t it more of an “all of the above”?

A lot of employees at successful startups & FAANG make most of their money from the stock, no? And they need to buy houses and send their kids to fancy schools too, no? So sure, we can reduce it to stock holders, but I’d bet dollars to donuts the 90% of employees who aren’t posting on hn are at least passively ok with “improving metrics”, and some ambitious ones are driving the enshittification initiatives hard.

jacobn··on Why I find diffusion models interesting?
The animation on the page looks an awful lot like autoregressive inference in that virtually all of the tokens are predicted in order? But I guess it doesn't have to do that in the general case?
jacobn··on Scientists solve the mystery of sea turtles' 'lost years'
> Scientists long thought that tiny turtles drifted passively with ocean currents, literally going with the flow.

> "What we've uncovered is that the turtles are actually swimming,"

> the trick was developing flexible solar-powered tags that could hang onto shells long enough to send back data.

> Eventually the GPS tags slough off because "the outside of a young turtle's shell sheds as they grow very quickly,"

jacobn··on Avoiding outrage fatigue while staying informed
This, plus the A/B testing of headlines to maximize clicks has lead inexorably to the current information environment.

Our intuitions, outrage, and knee-jerk reactions are being weaponized to gain clicks, votes, donations, and "action".

Many a dictatorship has fallen in the wake of social media revolutions. I wonder how long democracy can last?

In a would-be-funny-if-it-weren't-tragic ironic twist both of the two main US parties see themselves as the last guardians of democracy and frame their opponents as Evil, against which "any means necessary" is the only reasonable course of action.

(Yes, the party you disagree with is way worse and it's all their fault, this whataboutism indeed has to end, absolutely)

And here we all are.

jacobn··on USDA inspector general escorted out of her office after defying White House
> After this article was published, a USDA spokesperson said Fong left the office Monday on her own accord.

> "She was accompanied by two friends who she paused to take selfies with on her way out. Security officials did not play any role in her departure,” the spokesperson said.

jacobn··on Plasticlist Report – Data on plastic chemicals in Bay Area foods
Great work, very interesting list!

Ideally the "% Limit" column would: 1. Be right-aligned 2. Have consistent formatting (i.e. same number of digits after the dot) 3. A little bar underneath each number showing relative scale (i.e. top entry is full width, last entry is 216.7 / 32571.4 = 0.00665307601, though maybe on a log scale for confusion? ;)

jacobn··on Weird Lexical Syntax
https://en.wikipedia.org/wiki/Digraphs_and_trigraphs_(progra...

??! Is converted to |

So ??!??! Becomes || i.e. “or”

jacobn··on Company named "><SCRIPT SRC=HTTPS://MJT.XSS.HT> LTD" forced to change it (2020)
https://xkcd.com/327/
jacobn··on Esmeralda
Cool project! When is the next hike of the property?
jacobn··on Starship Flight 5: Launch and booster catch [video]
Would they need to be blocked completely? Maybe a much thinner shielding would still produce a significant benefit?

(Though likely not of course ;)

jacobn··on Show HN: EloqKV – Scalable distributed ACID key-value database with Redis API
Jepsen test?
jacobn··on Notes on OpenAI's new o1 chain-of-thought models
Is this a dataset issue more than an LLM issue?

As in: do we just need to add 1M examples where the response is to ask for clarification / more info?

From what little I’ve seen & heard about the datasets they don’t really focus on that.

(Though enough smart people & $$$ have been thrown at this to make me suspect it’s not the data ;)

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