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Show HN: Orderbook – a matching engine in Go, tested against a second one

https://github.com/intrepidkarthi/orderbook
1•intrepidkarthi•30s ago•0 comments

Tcl/Tk 9.1 Released

https://www.tcl-lang.org/software/tcltk/9.1.html
1•dmux•43s ago•0 comments

Force Yourself to Struggle Even If Using AI Is Easier

https://blog.nathanlangley.dev/posts/force-yourself-to-struggle.html
1•ninjahawk1•53s ago•0 comments

Dontkyc.me – directory of no-KYC services, tracked incidents and a trust score

https://dontkyc.me/
1•thorarganaut•1m ago•0 comments

IRGC writes an open letter to American people

https://en.mehrnews.com/news/248182/IRGC-writes-an-open-letter-to-American-people
1•ndiddy•1m ago•0 comments

Show HN: ChooseBrowser – route Mac links to a Chrome profile by URL rules

https://choosebrowser.leeguoo.com/download
1•leeguoo•2m ago•0 comments

Show HN: Iiveg.app – Find vegan food, restaurants and cosmetics around the world

https://iiveg.app/
1•mariusbolik•3m ago•0 comments

Hofstadter's Tangled Hierarchy with Video Feedback

https://www.youtube.com/watch?v=R1z3oM6h8uM
1•jerrysneede•3m ago•0 comments

Our Year of Saturday Dinners

https://amandalitman.substack.com/p/our-year-of-saturday-dinners
1•jgeralnik•5m ago•0 comments

Apple patches CoreGraphics zero-day already exploited in targeted attacks

https://www.theregister.com/security/2026/09/29/apple-patches-coregraphics-zero-day-already-explo...
1•guessmyname•5m ago•0 comments

Kompyla – a self-hosted research monitor that builds a cited wiki

https://github.com/damien220/kompyla
1•Damien_220•5m ago•0 comments

The Texas courtroom where toddlers face immigration judges

https://www.cnn.com/2026/09/28/politics/texas-immigration-court-minors
3•Tomte•6m ago•0 comments

Dots

https://openai.com/index/introducing-dots/
20•alvis•6m ago•2 comments

DevDay 2026 Recap

https://openai.com/index/devday-2026-recap/
2•polygot•6m ago•0 comments

Show HN: Retro Metro – Play Retro Games from the Browser

https://retro-metro.xyz/arcade/
1•I-A-S•6m ago•0 comments

GPT-6.1-Sol

https://developers.openai.com/api/docs/models/gpt-6.1-sol
1•denysvitali•7m ago•0 comments

GPT 6.1 Sol

https://openai.com/index/introducing-gpt-6-1-sol/
63•crorella•7m ago•27 comments

OpenAI Sept 29 Release Notes

https://help.openai.com/en/articles/6825453-chatgpt-release-notes#gpt-61-sol-in-chatgpt-work-and-...
1•Elliott-Diy•7m ago•0 comments

OpenZL v0.3.0

https://github.com/facebook/openzl/releases/tag/v0.3.0
1•terrelln•7m ago•0 comments

Getting started with your dot – OpenAI

https://help.openai.com/en/articles/20001530-getting-started-with-your-dot
2•polygot•8m ago•0 comments

Rodin Museum 3D Scan Verdict

https://cosmowenman.substack.com/p/rodin-museum-3d-scan-verdict
1•CosmoWenman•8m ago•0 comments

How a Refrigerator Works

https://www.ifixit.com/Wiki/How_a_Refrigerator_Works
2•at1as•9m ago•0 comments

Heavygram: The spyware that runs on Telegram

https://blog.relayshield.net/heavygram-the-spyware-that-runs-on-telegram
1•relayshield•10m ago•0 comments

Prompts Are Not Guardrails

https://sdeaton.com/blog/prompts-are-not-guardrails/
2•speckx•11m ago•0 comments

The Download: climate tech companies to watch and AI's discovery problem

https://www.technologyreview.com/2026/09/29/1145249/the-download-climate-tech-ai-scientific-disco...
1•joozio•12m ago•0 comments

Ask HN: Do you believe that the AI will kill everyone who doesn't say please?

1•roschdal•12m ago•4 comments

Hibernating bacteria survive outer space but energy budget reveals a weakness

https://phys.org/news/2026-09-hibernating-bacteria-invade-hospitals-survive.html
1•majkinetor•14m ago•0 comments

Scammers Pretending to Be Grandchildren Are Robbing the Elderly

https://thewalrus.ca/grandparent-scam/
2•gmays•16m ago•0 comments

John Wolff's Web Museum

https://www.johnwolff.au/
1•Snow_Falls•16m ago•1 comments

Show HN: Helping small business owners automate their front of house

https://essencetheapp.com
1•frankgrecojr•17m 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 ...