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Claude Code now supports Hooks

https://docs.anthropic.com/en/docs/claude-code/hooks
26•ramoz•31m ago•5 comments

Xfinity using WiFi signals in your house to detect motion

https://www.xfinity.com/support/articles/wifi-motion
213•bearsyankees•5h ago•156 comments

The new skill in AI is not prompting, it's context engineering

https://www.philschmid.de/context-engineering
320•robotswantdata•3h ago•185 comments

I write type-safe generic data structures in C

https://danielchasehooper.com/posts/typechecked-generic-c-data-structures/
212•todsacerdoti•7h ago•81 comments

There are no new ideas in AI only new datasets

https://blog.jxmo.io/p/there-are-no-new-ideas-in-ai-only
285•bilsbie•9h ago•151 comments

The hidden JTAG in a Qualcomm/Snapdragon device’s USB port

https://www.linaro.org/blog/hidden-jtag-qualcomm-snapdragon-usb/
111•denysvitali•5h ago•16 comments

Donkey Kong Country 2 and Open Bus

https://jsgroth.dev/blog/posts/dkc2-open-bus/
185•colejohnson66•9h ago•44 comments

Entropy of a Mixture

https://cgad.ski/blog/entropy-of-a-mixture.html
24•cgadski•3h ago•2 comments

End of an Era

https://www.erasmatazz.com/personal/self/end-of-an-era.html
65•marcusestes•5h ago•13 comments

The Original LZEXE (A.K.A. Kosinski) Compressor Source Code Has Been Released

https://clownacy.wordpress.com/2025/05/24/the-original-lzexe-a-k-a-kosinski-compressor-source-code-has-been-released/
47•elvis70•5h ago•3 comments

Melbourne man discovers extensive model train network underneath house

https://www.sbs.com.au/news/article/i-was-shocked-melbourne-mans-unbelievable-find-after-buying-house/m4sksfer8
21•cfcfcf•39m ago•5 comments

Show HN: TokenDagger – A tokenizer faster than OpenAI's Tiktoken

https://github.com/M4THYOU/TokenDagger
242•matthewolfe•11h ago•66 comments

Price of rice in Japan falls below ¥4k per 5kg

https://www.japantimes.co.jp/news/2025/06/24/japan/japan-rice-price-falls-below-4000/
63•PaulHoule•4h ago•77 comments

Jim Boddie codeveloped the first successful DSP at Bell Labs

https://spectrum.ieee.org/dsp-pioneer-jim-boddie
11•jnord•2h ago•0 comments

They don't make 'em like that any more: Sony DTC-700 audio DAT player/recorder

https://kevinboone.me/dtc-700.html
71•naves•6h ago•57 comments

GPEmu: A GPU emulator for rapid, low-cost deep learning prototyping [pdf]

https://vldb.org/pvldb/vol18/p1919-wang.pdf
11•matt_d•1h ago•0 comments

Creating fair dice from random objects

https://arstechnica.com/science/2025/05/your-next-gaming-dice-could-be-shaped-like-a-dragon-or-armadillo/
25•epipolar•2d ago•8 comments

People Keep Inventing Prolly Trees

https://www.dolthub.com/blog/2025-06-03-people-keep-inventing-prolly-trees/
13•lifty•2d ago•2 comments

A CarFax for Used PCs; Hewlett Packard wants to give old laptops new life

https://spectrum.ieee.org/carmax-used-pcs
60•rubenbe•7h ago•63 comments

Show HN: New Ensō – first public beta

https://untested.sonnet.io/notes/new-enso-first-public-beta/
211•rpastuszak•13h ago•81 comments

14.ai (YC W24) hiring founding engineers in SF to build a Zendesk alternative

https://14.ai/careers
1•michaelfester•7h ago

Ask HN: What Are You Working On? (June 2025)

353•david927•1d ago•1112 comments

The provenance memory model for C

https://gustedt.wordpress.com/2025/06/30/the-provenance-memory-model-for-c/
198•HexDecOctBin•15h ago•106 comments

Ask HN: What's the 2025 stack for a self-hosted photo library with local AI?

138•jamesxv7•6h ago•67 comments

The Plot of the Phantom, a text adventure that took 40 years to finish

https://scottandrew.com/blog/2025/06/you-can-now-play-plot-of-the-phantom-the-text-adventure-game/
173•SeenNotHeard•3d ago•34 comments

Jacobi Ellipsoid

https://en.wikipedia.org/wiki/Jacobi_ellipsoid
24•perihelions•2d ago•4 comments

Public Signal Backups Testing

https://community.signalusers.org/t/public-signal-backups-testing/69984
21•blendergeek•4h ago•2 comments

Making a $20 smart boombox [video]

https://www.youtube.com/watch?v=P3XCPywlXBI
8•surprisetalk•2d ago•2 comments

New proof dramatically compresses space needed for computation

https://www.scientificamerican.com/article/new-proof-dramatically-compresses-space-needed-for-computation/
176•baruchel•3d ago•92 comments

Show HN: We're two coffee nerds who built an AI app to track beans and recipes

https://beanbook.app
35•rokeyzhang•5h ago•24 comments
Open in hackernews

Cloud-forming isoprene and terpenes from crops may drastically improve climate

https://www.smithsonianmag.com/science-nature/scientists-are-just-beginning-to-understand-how-life-makes-clouds-and-their-discoveries-may-drastically-improve-climate-science-180986872/
47•gsf_emergency_2•10h ago

Comments

ricardobayes•7h ago
I think I saw this movie
bananapub•7h ago
It really does seem like it’s going to be impossible to stop rich lunatics from having a go at geoengineering instead of just actually helping to slash emissions.

Pretty embarrassing overall for the species.

ch4s3•7h ago
> just actually helping to slash emissions

The word just here hides a lot of complexity and difficult tradeoffs.

mslansn•7h ago
Don't know what rich assholes have to do with it, when all things I've seen proposed hurt poor people the most. Make meat unaffordable, make private transportation unaffordable, make travelling by plane unaffordable, make new clothes unaffordable, and the list goes on forever.
tonyedgecombe•6h ago
Do you think carbon emissions are coming from poor people’s consumption?

Even in the US only half the population will fly in any year and you can be sure it’s not the poorer half.

It’s not the rich half using public transport, they are only going to benefit from a transition away from private car ownership.

throwaway5752•6h ago
Yes. Poorer people buy things made overseas that requires a lot of shipping, and are lower quality that require more frequent replacement. They tend to have more children. They usually have more polluting energy sources. And there are many orders of magnitude more of them than rich people.

None of this is their fault, but ignoring it isn't good either.

All aircraft emissions are just 3% of US total. If all rich people (either the top 1% or 10%) reduced their emissions to zero tomorrow we would still not reach reduction targets needed to avoid catastrophic warming.

Everyone needs to contribute.

trollbridge•6h ago
I'm a little sceptical of claims like "poor people cause more pollution because they have more children than rich people do".
throwaway5752•5h ago
Having a child is on of the most carbon intensive actions any given person can make.

The numbers are what they are. Rich people have much greater obligation to reduce their emissions. They benefit most from economic activity and they cause the most emissions per capita.

If there were zero rich people tomorrow we would still have an emissions problem for the climate.

bilsbie•4h ago
What if the child is a climate activist?
adolph•3h ago
> Having a child is on of the most carbon intensive actions any given person can make.

What about continuing to live at all? That is a decision people make every moment of the day and are not being held accountable for it at all.

If there were zero people tomorrow there would be still be an ongoing problem for the climate from the changes wreaked already.

thejazzman•3h ago
You're correct that 24h is not enough time, but wrong to suggest that the world would remain perfectly static instead of changing.

There would be dramatic reforestation, algae growth, etc.

throwaway5752•2h ago
I indelicately started a contentious topic that didn't have to exist. If I were given a fresh chance, I'd have just said that carbon emissions and the changes they are causing to the planet are a bigger problem than any single economic class or nation.

That might have caused some controversy, too, but is closer to what I meant. Your point is well taken, but maybe if I posted differently the ensuing discussion would have been less acrimonious.

sorcerer-mar•5h ago
Shipping the things that poor people buy is almost unfathomably eco-friendly.

Gargantuan slow ships are actually a great way to move stuff.

MildlySerious•6h ago
That's exactly what rich assholes have to do with it. Why do you believe all the consequence falls onto the working class and the poorest, when the richest have per capita the largest emissions, by whole orders of magnitude?

Yeah, the changes required are systemic and go from the top all the way to the bottom, and the things you mention are part of that process, but pricing people out of everything without offering an off-ramp is sadistic bullshit, and the only reason it's a thing is because rich people and stock prices have more representation in politics than the poor and the environment.

IncreasePosts•4h ago
Who cares about per capita emissions? Billionaires could have 1000x the emissions as normal people, but there are so few of them, cutting their emissions down to zero would have absolutely no impact on climate change.
zahlman•6h ago
What do you suppose is the net worth of the people spearheading efforts in solar power and electric vehicles?
zemvpferreira•6h ago
Cut carbon emissions to zero tomorrow and we’re still in a great deal of trouble. Earth is a lagging system and the damage has been done 10 times over.

I don’t blame anyone for looking at radical solutions. We’re not putting out the fire by putting the wood back in a pile.

sorcerer-mar•5h ago
What about blaming people for grabbing an assortment of different non-wood, non-water objects and throwing them on the fire?

There’s obviously some need to experiment to see if we can find solutions, but historically our track record for engineering complex systems has not been great.

sweettea•4h ago
I mean, we're already having democratized geoengineering: Make Sunsets (https://makesunsets.com/) allows you or anyone else to fund deploying high-altitude clouds for geocooling.
dylan604•6h ago
I guess FloridaMan won't be doing this as they've recently passed legislation to ban this type of stuff. I think this is one of those cases where it was done for the wrong reasons, but it kind of works out in the end

https://www.tallahassee.com/story/news/politics/2025/06/23/c...

delfinom•2h ago
Sounds like florida man needs to ban plants
ElevenLathe•6h ago
Rain follows the plow?
axiolite•1h ago
Clever, but no. This is about cloud formation, and doesn't indicate any (significant) increased chances of precipitation.
fred_is_fred•6h ago
This is exactly backwards from what I would think: "Bright ones at low altitudes generally reflect solar energy away, whereas wispier ones up to 20,000 feet tend to trap heat.". I would have guessed high ones reflect it before it gets lower into the atmosphere.
jvanderbot•6h ago
You might be surprised to learn how much global warming impact from jet aircraft is actually from creating "high-up wispy clouds" in the form of contrails (which are just water vapor).
pfdietz•2h ago
Contrails condense from water vapor, but are not themselves water vapor.
alliao•2h ago
does it have some kind of nuclei and have water vapour surround it? I'm guessing from impurities of burnt fuel?
pfdietz•1h ago
Particles in the exhaust from incomplete combustion, I think.
roter•6h ago
The whispey ones are largely transparent to incoming shortwave radiation but largely opaque to outgoing longwave radiation. You just need to put on your ~10 micron wavelength goggles.
pfdietz•2h ago
Industrial production of isoprene is about 800,000 tons/year. Global emission from plants of the chemical is about 600 million tons/year.

In the US, the large natural emission of isoprene is why emission control for vehicles shifted to focus on NOx emission.

dtgriscom•2m ago
[delayed]