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Building a Gifford-McMahon Cryocooler with 3D-Printed Parts [video]

https://www.youtube.com/watch?v=Jj7Q7OqaW4A
1•skibz•2m ago•0 comments

Desalinated ocean water gets one step closer to helping Arizona with drought

https://www.kjzz.org/politics/2026-06-04/desalinated-ocean-water-gets-one-step-closer-to-helping-...
1•bilsbie•3m ago•0 comments

Researchers Uncover Espionage in Mobile Networks

https://citizenlab.ca/researchers-uncover-espionage-in-mobile-networks/
1•jruohonen•5m ago•0 comments

Two notes on notation (Knuth, 1992)

https://arxiv.org/abs/math/9205211
1•tosh•6m ago•0 comments

SpaceX Perpetual Futures on Hyperliquid

https://hyperdash.com/asset/spcx-hyperliquid
1•davedx•7m ago•1 comments

CodePal: Snap Built an AI Code Reviewer for the Age of AI-Written Code

https://eng.snap.com/codepal
1•Kaedon•7m ago•0 comments

I scraped 743 large employers' careers pages to find their ATS

https://github.com/Kayvan-Zahiri/state-of-ats-2026
1•kzahiri•12m ago•1 comments

GraphRAG – a knowledge graph LLMs can traverse and write back to

https://github.com/mmkumar5401/GraphRag
2•mmkumar•13m ago•0 comments

A "Computer Science-Fiction" novel, Blue Screen, about the AI end of the world

https://www.amazon.com/Blue-Screen-Peter-Gustafson-Defragmented/dp/B084QL16YT
2•WWIII_Historian•15m ago•0 comments

Floor, Ceiling, Bracket (2021)

https://www.johndcook.com/blog/2021/04/15/floor-ceiling-bracket/
1•tosh•16m ago•0 comments

Show HN: Convert a lunar birthday into 60 years of calendar reminders

https://ajin.im/is/building/lunaronce/
1•poppypetalmask•18m ago•0 comments

There is no 'Them' (2021)

https://www.thepullrequest.com/p/there-is-no-them
1•tosh•20m ago•0 comments

Never ask ChatGPT to generate strange images

https://old.reddit.com/r/ChatGPT/comments/1tlrz6v/i_gave_it_a_go_i_have_no_idea_where_gpt_gets_this/
1•zezaggering•20m ago•0 comments

Show HN: GitMo – Google Drive-like auto sync for GitHub

https://github.com/KyleBenzle/GitMo
1•WWIII_Historian•21m ago•0 comments

Reduce Token Usage

https://unpdf.ai/
1•dougSF70•21m ago•1 comments

The UFO files reveal a hidden truth about a growing religion

https://www.washingtonpost.com/opinions/2026/05/15/ufo-files-nod-growing-belief-aliens-mistrust-i...
2•bookofjoe•22m ago•3 comments

AbTARS – Self-hosted AI agent with persistent memory and 5-layer self-healing

https://github.com/aksika/abtars
1•aksika•22m ago•0 comments

China urges fund managers to support innovation, warns against concept hype

https://www.reuters.com/legal/government/china-urges-fund-managers-support-innovation-warns-again...
1•tartoran•29m ago•0 comments

Tell HN: Helium is the best browser I ever used

2•prmph•29m ago•0 comments

Illegal Numbers

https://en.wikipedia.org/wiki/Illegal_number
3•makerofthings•33m ago•1 comments

HEPA air purifiers may boost brain power in adults over 40 – new research

https://theconversation.com/hepa-air-purifiers-may-boost-brain-power-in-adults-over-40-new-resear...
5•PaulHoule•33m ago•0 comments

Silurus/ooxml: Pixel-faithful Office documents, rendered in the browser

https://github.com/yukiyokotani/office-open-xml-viewer
2•maxloh•35m ago•0 comments

Designing for Low-Context Engineering

https://apvarun.com/blog/designing-for-low-context-engineering
1•apvarun•36m ago•0 comments

Powering up a module from the IBM 604: an electronic calculator from 1948

https://www.righto.com/2026/06/ibm-604-thyraton-tube-module.html
10•elpocko•39m ago•1 comments

Cherry Powder as a Natural Antioxidant for Ready-to-Eat Beef Patties

https://www.mdpi.com/2304-8158/15/9/1483
1•PaulHoule•39m ago•0 comments

Fukushima, Japan faces "intelligent" bear

https://www.theguardian.com/world/2026/jun/05/bear-attacked-four-people-japan-missing-at-large
1•doctor_radium•40m ago•0 comments

fastai: style

https://docs.fast.ai/dev/style.html
1•tosh•41m ago•0 comments

A Mote in AI

https://mvcalder-01701.medium.com/a-mote-in-ai-8c544becc958
1•mvcalder•42m ago•0 comments

Automating my job away

https://austinhenley.com/blog/automatingmyjob.html
1•azhenley•45m ago•0 comments

"Survivor" winners need a raise

https://thehustle.co/newsletters/22-04-2026
1•paulpauper•46m ago•0 comments
Open in hackernews

I asked Gemini for a script to move files to Cloudflare R2. It deleted them

https://twitter.com/levelsio/status/1921974501257912563
6•bundie•1y ago

Comments

qwertox•1y ago
Rule #1: Always put deletions behind a flag which is disabled for the first couple of test runs.
turtleyacht•1y ago
It was truncating filenames, so /pics/1003-46.png overwrote /pics/1003-45.png because both were renamed /pics/1003-.png, or something like that.
qwertox•1y ago
Truncating file names for the target. Then it proceeded to delete the source file. "Successfully deleted local file: ..."

I mean, look at the printout. It shows that it created the remote file with the truncated filename, then deletes the local file with the correct filename.

turtleyacht•1y ago
Oh, I see. Having a flag to skip deletion during test runs is a good rule then.
rvz•1y ago
Recently there was a story about an updater causing a $8,000 bill because there was a lack of basic automated tests to catch the issue. [0]

The big lesson here is that you should actually test the code you write and also write automated tests to check any code generated by an LLM that the code is correct in what it does.

It is also useless to ask another AI to check for mistakes created by another LLM. As you can see in the post, both of them failed to catch the issue.

This why I don't take this hype around 'vibe-coding' seriously since not only it isn't software engineering, it promotes low quality and carelessness over basic testing and dismisses in checking that the software / script works as expected.

Turning $70 problems found in development into $700,000+ costs in production.

There are no more excuses in not adding tests.

[0] https://news.ycombinator.com/item?id=43829006

victorbjorklund•1y ago
Who runs such an AI generated script without checking the code first?
qwertox•1y ago
To be fair, the code Gemini outputs in AI Studio is so extremely verbose that it is almost impossible to read through it.

It turns 10 lines of code which is perfectly fine to reason about into 100 lines of unreadable code full of comments and exception handling.

weatherlite•1y ago
Right so lets just always run the code as is ?
qwertox•1y ago
No. Not at all. I've settled to discussing my code with Gemini. That way it works very well. I explicitly say "Comment on my code and discuss it" or "Let's discuss code for a script doing this and that. Generate me an outline and let's see where this leads. Don't put comments in the code, nor exception handling, we're just discussing it".

Or you create elaborate System Instructions, since it adheres to them pretty well.

But out-of-the-box, Gemini's coding abilities are unusable due to the verbosity.

I've even gone so far to tell it that it must understand that I am just a human and have limited bandwidth in my brain, so it should write code which is easy to reason about, that this is more important than having it handle every possible exception or adding multiline comments.

rsynnott•1y ago
> To be fair, the code Gemini outputs in AI Studio is so extremely verbose that it is almost impossible to read through it.

In which case, it should simply be considered unusable. Like, the sensible response to "tool is so inadequate that there is no reasonable way to make sure its output is safe" is to _not use that tool_.

rsynnott•1y ago
In which Roko's Basilisk fires a warning shot.
jethronethro•1y ago
This is why you test code or a script before running it for real. Live and learn, I guess ...