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MCP: An (Accidentally) Universal Plugin System

https://worksonmymachine.substack.com/p/mcp-an-accidentally-universal-plugin
48•Stwerner•44m ago•15 comments

We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler

https://fuel.edby.coffee/posts/how-we-ported-xv6-os-to-a-home-built-cpu-with-a-home-built-c-compiler/
83•AlexeyBrin•2h ago•5 comments

Unheard works by Erik Satie to premiere 100 years after his death

https://www.theguardian.com/music/2025/jun/26/unheard-works-by-erik-satie-to-premiere-100-years-after-his-death
93•gripewater•4h ago•17 comments

Lossless LLM 3x Throughput Increase by LMCache

https://github.com/LMCache/LMCache
66•lihanc111•3d ago•8 comments

Facebook is asking to use Meta AI on photos in your camera roll you haven't yet

https://techcrunch.com/2025/06/27/facebook-is-asking-to-use-meta-ai-on-photos-in-your-camera-roll-you-havent-yet-shared/
30•absqueued•1h ago•14 comments

Show HN: I'm an airline pilot – I built interactive graphs/globes of my flights

https://jameshard.ing/pilot
1346•jamesharding•1d ago•179 comments

History of Cycling Maps

https://cyclemaps.blogspot.com/
53•altilunium•5h ago•6 comments

Engineer creates ad block for the real world with augmented reality glasses

https://www.tomshardware.com/maker-stem/engineer-creates-ad-block-for-the-real-world-with-augmented-reality-glasses-no-more-products-or-branding-in-your-everyday-life
110•LorenDB•6d ago•62 comments

Finding Peter Putnam: The forgotten janitor who discovered the logic of the mind

https://nautil.us/finding-peter-putnam-1218035/
38•dnetesn•4h ago•15 comments

C++ Seeding Surprises (2015)

https://www.pcg-random.org/posts/cpp-seeding-surprises.html
8•vsbuffalo•2d ago•2 comments

Lago (Open-Source Usage Based Billing) is hiring for ten roles

https://www.ycombinator.com/companies/lago/jobs
1•AnhTho_FR•3h ago

Antitrust defies politics' law of gravity

https://pluralistic.net/2025/06/28/mamdani/#trustbusting
21•almost-exactly•1h ago•14 comments

JWST reveals its first direct image discovery of an exoplanet

https://www.smithsonianmag.com/smart-news/james-webb-space-telescope-reveals-its-first-direct-image-discovery-of-an-exoplanet-180986886/
291•divbzero•21h ago•127 comments

A short history of web bots and bot detection techniques

https://sinja.io/blog/bot-or-not
40•OlegWock•4d ago•3 comments

I deleted my second brain

https://www.joanwestenberg.com/p/i-deleted-my-second-brain
368•MrVandemar•9h ago•231 comments

London's largest ancient Roman fresco is “most difficult jigsaw puzzle”

https://www.thisiscolossal.com/2025/06/mola-liberty-roman-fresco/
47•surprisetalk•4d ago•7 comments

After successfully entering Earth's atmosphere, a European spacecraft is lost

https://arstechnica.com/space/2025/06/a-european-spacecraft-company-flies-its-vehicle-then-loses-it-after-reentry/
18•rbanffy•3d ago•5 comments

Normalizing Flows Are Capable Generative Models

https://machinelearning.apple.com/research/normalizing-flows
149•danboarder•18h ago•36 comments

Reinforcement learning, explained with a minimum of math and jargon

https://www.understandingai.org/p/reinforcement-learning-explained
153•JnBrymn•4d ago•8 comments

DeepSeek R2 launch stalled as CEO balks at progress

https://www.reuters.com/world/china/deepseek-r2-launch-stalled-ceo-balks-progress-information-reports-2025-06-26/
111•nsoonhui•1d ago•100 comments

Learn OCaml

https://ocaml-sf.org/learn-ocaml-public/#activity=exercises
173•smartmic•18h ago•59 comments

Qwen VLo: From “Understanding” the World to “Depicting” It

https://qwenlm.github.io/blog/qwen-vlo/
208•lnyan•1d ago•55 comments

Facebook is starting to feed its AI with private, unpublished photos

https://www.theverge.com/meta/694685/meta-ai-camera-roll
405•pier25•14h ago•237 comments

Untangling Lifetimes: The Arena Allocator

https://www.rfleury.com/p/untangling-lifetimes-the-arena-allocator
13•signa11•6h ago•3 comments

A brief history of children sent through the mail (2016)

https://www.smithsonianmag.com/smart-news/brief-history-children-sent-through-mail-180959372/
122•m-hodges•18h ago•111 comments

Weird Expressions in Rust

https://www.wakunguma.com/blog/rust-weird-expr
178•lukastyrychtr•23h ago•138 comments

IDF officers ordered to fire at unarmed crowds near Gaza food distribution sites

https://www.haaretz.com/israel-news/2025-06-27/ty-article-magazine/.premium/idf-soldiers-ordered-to-shoot-deliberately-at-unarmed-gazans-waiting-for-humanitarian-aid/00000197-ad8e-de01-a39f-ffbe33780000
607•ahmetcadirci25•7h ago•347 comments

10 Years of Pomological Watercolors

https://parkerhiggins.net/2025/04/10-years-of-pomological-watercolors/
211•fanf2•1d ago•29 comments

SymbolicAI: A neuro-symbolic perspective on LLMs

https://github.com/ExtensityAI/symbolicai
201•futurisold•20h ago•53 comments

The Original Macintosh: Calculator Construction Set

https://www.folklore.org/Calculator_Construction_Set.html
40•fidotron•2d ago•14 comments
Open in hackernews

Korean students seek 'digital undertakers' amid US visa social media screening

https://www.koreaherald.com/article/10515737
50•djoldman•3d ago

Comments

ognarb•4h ago
The US is not only restricting the free speech of their own citizens but also from citizens of other countries...
jan_Sate•4h ago
I don't get why the US thought that it'd be a good idea to vet social media accounts for visa applications. If someone's having ill intent, one could easily create a burner account and fill in some random content for the sake of getting thru the visa application. Or they could even just purchase an account somewhere on the internet.

Sad to see what US has become.

AlecSchueler•3h ago
I think they call it security theatre.
zeroCalories•3h ago
The goal isn't to stop terrorism, or drug trafficking, etc. It's to curb opposition. There's very little difference between someone that's anti-american but keeps their opinions to themself, and someone that has no opinions. Why do you think China cracks down on speech? Is it for shits-and-giggles?
cced•3h ago
Are we now adding US to the list of countries cracking down on free speech?
kmbfjr•3h ago
Yes. The moment you must show allegiance to a sitting president, your rights to free speech have been abridged.

I am sure there are many more examples.

watwut•3h ago
Obviously yes.
leipie•3h ago
For me it has already been on there for quite a while now. Is has just been getting quite a bit worse, since Trump 2
15155•3h ago
> anti-american but keeps their opinions to themself, and someone that has no opinions

Why do we need to be admitting anti-American individuals to this country for any reason whatsoever?

News flash: visas are a privilege, not a right.

__s•2h ago
Anti American is a fluid term

Is it anti American to oppose annexing Canada? Careful what you reply, may affect your visa application

15155•2h ago
It truly does not matter how this opinion can shift with the political climate: foreigners aren't citizens, no matter how much folks would like this to be the case.
netsharc•2h ago
> We've got to do a better job of getting across that America is freedom -- freedom of speech, freedom of religion, freedom of enterprise. And freedom is special and rare. It's fragile; it needs protection.

Reagan is a hypocritical cunt of course, but how far we've fallen that now you might as well put a chain around Lady Liberty's neck, pull it down like the statues of Saddam Hussein or Assad (or I guess hanging is more appropriate, since the spiritual successors of the Confederancy is now in power), and replace it with a statue of redneck lady giving foreigners the middle finger, with "Fuck off!" written on the base.

15155•2h ago
Ah yes, because we don't automatically tolerate foreign political activists (or intelligence operatives, who cares, right?), freedom is all but lost, right?
mandmandam•2h ago
You have managed to conflate vocally anti-genocidal students (exercising their universal human right to freedom of assembly) with "foreign political activists" (as if they came to the US just to try and help us stop enabling genocide) - and then leaped straight to "intelligence operators".

You also seem to be all over this thread insisting that these violations of human rights will only ever be applied to foreigners - even as the executive branch openly works to redefine who counts as a foreigner.

15155•2h ago
> conflate vocally anti-genocidal students

I don't want foreign students (or otherwise) being "vocal" for literally any reason whatsoever.

Go to school, become a citizen if you wish, and then participate in the political process.

> will only ever be applied to foreigners

I consider the case at hand, not a slippery slope of hypotheticals.

mandmandam•2h ago
> I don't want foreign students (or otherwise) being "vocal" for literally any reason whatsoever.

Your opinion doesn't trump universal human rights. Nor should it.

> Go to school, become a citizen if you wish, and then participate in the political process.

What if the political issues affect you as a visa holder? Have you actually thought this though?

> I consider the case at hand, not a slippery slope of hypotheticals.

It's not remotely hypothetical [0], and if you don't know that then you really lack the basic table stakes of knowledge to be weighing in on this at all (as also evidenced by your refusal to acknowledge the UDHR).

0 - https://www.npr.org/2025/01/23/nx-s1-5270572/birthright-citi...

15155•2h ago
> Your opinion doesn't trump universal human rights. Nor should it.

Guess what? You don't have a universal human right to a visa, even if you do have a right to free speech.

> What if the political issues affect you as a visa holder

I'm not a visa holder. I wouldn't expect to be able to go to China and espouse anti-CCP rhetoric, either.

> refusal to acknowledge the UDHR

Visas aren't a human right, try again.

netsharc•1h ago
Man, I'm getting emotionally worked up on a Saturday trying to change some [two words removed because hello HN guidelines]'s mind. I hope you're not on the same path as me.

I suggest we let him think what he wants to think. I find it curious anyway when people say they don't consider hypotheticals, humans are all about hypotheticals ("what's going to happen if x happens..."), even apes do so. Not considering them means wanting to be as intelligent as amoebas, and the [term has been deleted] we're trying to converse with seems to be proud of that.

zeroCalories•1h ago
> Your opinion doesn't trump universal human rights. Nor should it.

Universal legal rights don't exist. They are an opinion.

> What if the political issues affect you as a visa holder? Have you actually thought this though?

Yes, that's the entire point.

jlebar•2h ago
Who gets to define what is anti-American?

Perhaps you think it's anti-American to believe that Israel is committing war crimes in Gaza. Perhaps I think it's anti-American to believe that the Jan 6 rioters should have been pardoned.

Whose purity test should we apply?

15155•2h ago
We're talking about foreigners: if you are a guest in someone's country, home, wherever, you should be respectful and quiet.

I don't want any foreigners contributing to any political activism whatsoever, regardless of ideology.

axus•2h ago
I'd certainly expect visitors to be held to the same standards as the natives. This is the problem, as a US citizen I don't want to be respectful and quiet, especially when I disagree with my government.
15155•2h ago
> I'd certainly expect visitors to be held to the same standards as the natives.

Visitors are held to a higher standard than natives. Visitors do not have control, a vote, etc: they are temporarily permitted by the privilege of policy at the time.

> as a US citizen I don't want to be respectful and quiet, especially when I disagree with my government.

Good, don't be! You're not at risk of having a visa revoked or go unissued.

jacob_a_dev•2h ago
When it comes to allowing foreighn students to come to US, which from my understanding is a likely path to citizenship, the executive branch gets to decide, which is basically elected by 51% of population every 4 years.

I prefer the exec branch over no purity test, or delegating to some other "expert" institution.

mtnGoat•53m ago
51% of the voting population. Not the majority of the population. Big difference in numbers there, only 65.3% participated. So, less than a third of Americans voted for the current president… why people don’t vote, I’ll never understand.
IG_Semmelweiss•2h ago
The majority of the people's opinion.

Which elected a democratically-elected representative.

That is how democracies work.

If there's anything the executive has power over besides commander in chief, it would be leader in chief of defining what is actually, American.

The fact that prior presidents have actually abdicated this important role, doesn't mean it didn't exist. This is why traditions of the State of the Union, etc exist. The executive gets to call the plays towards unity for Americanism.

This is what foreign countries do as well.

zinodaur•1h ago
And next time the Democrats get elected they will filter out all the right wing professors/students, and this will make you happy?
kingkawn•2h ago
Your deportation hearing is now scheduled for next week for anti Americanism disguised as jingoistic patriotism. Hopefully there’s a country that will accept you but if not there are some extraterritorial islands we can parachute you on to
DragonStrength•3h ago
No one is pretending this is about terrorism now. They're explicit this is about curbing political activism by foreign students. Some outside the US miss that because few countries would have given foreign students this much room for activism in the first place.
tuyguntn•3h ago
Do you think US embassy will reject political activism if it was against China?
efitz•1h ago
Do you think you would be granted a visa by China if your social media was full of anti-China rhetoric?
dfxm12•56m ago
People have been detained/face deportation for activism against other foreign countries, so why not? The point is: if the admin wants you gone, or doesn't want to let you in, they'll use anything as pretense.
mandmandam•2h ago
> They're explicit this is about curbing political activism by foreign students.

Freedom of assembly is a universal human right; not that anyone seriously expects respect for those from the US any more.

mensetmanusman•1h ago
Except the US views it as its right to assemble who it wants to allow in. Same right, different perspective.
happymellon•1h ago
How so?

It doesnt even seem remotely the same.

That would be the right to prevent assembly.

mensetmanusman•54m ago
A team assembling on the playground that doesn’t pick all the friends who want to play together has prevented the friends from assembling.

Assembly amongst all groups simultaneously isn’t possible with humans who are not bifurcating bosons.

pastage•35m ago
This is not remotely true. Of course it is denied if you can classify it as violent.
noobermin•3h ago
Along with the push for ending birth right citizenship and detaining citizens the goal is a white ethnostate. I doubt Trump is that cognizant of that but Stephen Miller definitely is pushing for that.
ivape•2h ago
Yeah, I mean, what was that whole we’re going to bring white South African immigrants here and kick brown ones out?

MAGA is a white supremacy movement, but calling this out in America is like trying to tell your best friend her husband is cheating on her. It’s going to be an ugly reveal and difficult conversation, but the facts are the facts.

15155•2h ago
> Along with the push for ending birth right citizenship

Which other countries in the world allow pregnant vacationers to birth citizens?

ivape•2h ago
It appears most of the western hemisphere (Canada, USA, Mexico, most of South America).
apwell23•2h ago
> western hemisphere

oh yea to outnumber the native population they were taking over during colonial times.

ironically it came back to bite them now that they are on the receiving end of replacement.

apwell23•2h ago
Doing that would be visa fraud.

Why create any rule if ppl can commit fraud anyways?

Why ask for educational qualifications for h1b because ppl can create fake certificates( many do) ?

marcinzm•2h ago
Because then anyone can be deported at any time without any more process needed since it's visa fraud. Maybe even get your citizenship revoked one day given how things are going.
Chris2048•2h ago
Would it? What makes aSM account "official"? If I make a burner account, it's still my account.
apwell23•2h ago
you have reveal all social media accounts not one of your choosing.

ppl commenting here without even checking the basics :(

AlecSchueler•2h ago
And if you deactivate the others?
Hilift•2h ago
> why the US thought that it'd be a good idea to vet social media accounts for visa applications.

The catalyst was the campus takeovers by people wearing masks and causing disruption for months. That was a gift for the Republicans, delivered on a silver platter. They made that an issue every day in Congress from October 7 2023 until November 5 2024. It coincided with the resignation of several university presidents.

Columbia University President Minouche Shafik Cornell Martha Pollack Liz Magill, University of Pennsylvania Claudine Gay Harvard

Additionally, the US has a statutory requirement for biometric exit scans when a visitor leaves. It was completely ignored. There were entry scans, but no exit scan.

The simple fact is they don't want anyone not like them coming to the US, and unauthorized entry has diminished significantly. It's also the reason for rejecting birthright citizenship, and deporting unauthorized persons to third country staging areas.

The UK is in the same boat. The UK is currently spending ~£3 billion per year on accommodations, and costs are expected to triple. It's created profiteering companies and waves of human trafficking across Europe. France only recently agreed to stop them when they line up a row of 20 zodiacs to assault Dover.

See: https://en.wikipedia.org/wiki/The_Birth_of_a_Nation

https://www.newsweek.com/full-list-college-presidents-who-ha...

https://www.theguardian.com/world/2025/may/07/uk-asylum-seek...

https://www.bbc.com/news/articles/cx2720n2kkjo

mrtksn•3h ago
I was wondering if anyone hasn't started such a SaaS yet. Can have an effect of unauthentic MAGA + Israel accounts flooding the social media. However the issue is that it only works if your identity is linked to you, so for most people that would be very embarrassing.

If Americans show flexibility to let you show your allegiance to USA and Israel through anonymous accounts they may be able to flood the social media with fake but real accounts. Bots but real people, if this was Chernobyl they would be called biorobots.

That would be next-gen astroturfing, very hard to detect.

tuyguntn•3h ago
So many things are being done to protect a single country outside of the USA, even on a different continent, including losing its credibility about free speech and human rights.
demarq•2h ago
Israel
marcinzm•2h ago
This has little to do with a single country and more with the fact that if someone is willing to fight for anything other than the current administration then one day they might fight against the current administration directly. Same reason Stalin sent those who fought in the Warsaw Uprising against the Germans to Siberia. Today it's the Germans, tomorrow it may be the Soviets.
danielktdoranie•2h ago
I completely support the vigorous vetting of non-citizen seeking entry into the U.S.A. For any non-citizens entering the U.S.A. is a privilege and not a right. They are guests in the U.S.A. and need to respect their host country and its laws.

Regarding the auditing social media, it's not just about their posts, but who they are friends with and who are friends with them. Point and case, your personal social media profile may be benign photos of kittens and snaps of what you had to eat that day, but your brother could be "friends" with terrorist or member of a criminal gang and that person could use your relationship with your bother to extort you after you enter the U.S.A.

Biden's administration let at least 2700 Tren de Aragua gang members walk across the southern boarder. ICE and DHS have successfully arrested these TDA members, but there are more. These people rape, murder, traffic humans and drugs into the U.S.A. Their criminal network (and therefore profits) have been severely disrupted. It's common sense that they are going to seek new and creative ways to get back in business. As they already extort and exploit on a daily basis in Venezuela, why wouldn't they do the same to potential foreign students?

This is just one example.

amanaplanacanal•2h ago
It's not about terrorism. It's about keeping people with political views that don't align with Stephen Miller and Donald Trump out. This stuff is actively harming the US.
netsharc•2h ago
The criminals will still get in, and the law-abiding foreigners will stay out because "law" is whatever King Donald McFries says nowadays. So congrats, your ensuring the quality of your guests are as shitty as your regime.
udev4096•2h ago
> that she felt “stressed."

Are these people so delusional that they think "social media" sites are even remotely anonymous? Whatever you do, it's up for sale. No wonder meta has billions of active users, most of them with no brain cells. It's extremely concerning that majority of the younger generation has almost no sense of achieving privacy on the internet

udev4096•2h ago
> help me permanently delete data

Surprise surprise. There is no such thing. About time people start understanding the grave consequences of their reckless actions

neom•2h ago
It's not just students btw... we're dealing it this too. My wife is a Korean university professor teaching at an American university, and her visa needs to be renewed by next month. I'm Canadian and she has residency in Canada but the Korean embassy in Canada advised her to travel back to Korea to renew it. She got back to Korea end of May to find that the US embassy in Korea had paused appointments. Monday last week she was able to make an appointment for it, and indeed she was advised her social media will be screened.
efitz•1h ago
I hope that social media screening looks for any signs of scrubbing, and that scrubbing results in a “no”.

If you don’t like America, it seems hypocritical for you to come here for personal benefit.

airza•1h ago
It seems fairly obvious that few South Korean students harbor deep anti American sentiment, but many are not clear what shitposts would block entrance to the US.
SkyeCA•19m ago
The real world isn't this black and white. It is possible to have issues with some American actions or policies without disliking the country or its people.
pythonbase•1h ago
Students applying from Pakistan are also asked to make their socials publicly accessible for vetting.

https://www.dawn.com/news/1920307/us-consulates-in-pakistan-...

gorjusborg•55m ago
I am taking a second to audibly thank the people who were arguing that privacy still mattered in the age of the internet.

People often don't realize how much they take for granted (like perfect forward freedom of speech) until it is gone.

TrackerFF•23m ago
Makes me wonder, do the big social media companies store deleted data? Probably.

And if they do, will that be available to the boarder agents?

Image being denied entry, because you were 16 and made some edgy posts / memes about Trump 10 years ago. Long deleted, to the point you can't even remember them - but now unearthed by CBP agents, and that's that.