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GPT-5.5

https://openai.com/index/introducing-gpt-5-5/
998•rd•6h ago•652 comments

Bitwarden CLI compromised in ongoing Checkmarx supply chain campaign

https://socket.dev/blog/bitwarden-cli-compromised
611•tosh•9h ago•286 comments

Show HN: Tolaria – open-source macOS app to manage Markdown knowledge bases

https://github.com/refactoringhq/tolaria
51•lucaronin•2h ago•21 comments

MeshCore development team splits over trademark dispute and AI-generated code

https://blog.meshcore.io/2026/04/23/the-split
140•wielebny•7h ago•82 comments

U.S. Soldier Charged with Using Classified Info to Profit from Prediction Market

https://www.justice.gov/usao-sdny/pr/us-soldier-charged-using-classified-information-profit-predi...
83•paulpauper•1h ago•27 comments

An update on recent Claude Code quality reports

https://www.anthropic.com/engineering/april-23-postmortem
525•mfiguiere•6h ago•396 comments

Show HN: Agent Vault – Open-source credential proxy and vault for agents

https://github.com/Infisical/agent-vault
53•dangtony98•1d ago•14 comments

TorchTPU: Running PyTorch Natively on TPUs at Google Scale

https://developers.googleblog.com/torchtpu-running-pytorch-natively-on-tpus-at-google-scale/
23•mji•3h ago•2 comments

I am building a cloud

https://crawshaw.io/blog/building-a-cloud
963•bumbledraven•19h ago•481 comments

My phone replaced a brass plug

https://drobinin.com/posts/my-phone-replaced-a-brass-plug/
64•valzevul•7h ago•9 comments

Incident with multple GitHub services

https://www.githubstatus.com/incidents/myrbk7jvvs6p
194•bwannasek•7h ago•97 comments

Palantir employees are starting to wonder if they're the bad guys

https://www.wired.com/story/palantir-employees-are-starting-to-wonder-if-theyre-the-bad-guys/
649•pavel_lishin•6h ago•458 comments

UK Biobank health data keeps ending up on GitHub

https://biobank.rocher.lc
53•Cynddl•10h ago•14 comments

Your hex editor should color-code bytes

https://simonomi.dev/blog/color-code-your-bytes/
484•tobr•2d ago•141 comments

Girl, 10, finds rare Mexican axolotl under Welsh bridge

https://www.bbc.com/news/articles/c9d4zgnqpqeo
161•codezero•4h ago•122 comments

Astronomers find the edge of the Milky Way

https://skyandtelescope.org/astronomy-news/astronomers-find-the-edge-of-the-milky-way/
70•bookofjoe•5h ago•13 comments

A programmable watch you can actually wear

https://www.hackster.io/news/a-diy-watch-you-can-actually-wear-8f91c2dac682
122•sarusso•2d ago•65 comments

How tolls saved Britain from pothole hell in the Industrial Revolution

https://www.cam.ac.uk/stories/fixing-the-roads-turnpikes
4•hhs•1h ago•0 comments

Show HN: Honker – Postgres NOTIFY/LISTEN Semantics for SQLite

https://github.com/russellromney/honker
222•russellthehippo•12h ago•51 comments

French government agency confirms breach as hacker offers to sell data

https://www.bleepingcomputer.com/news/security/french-govt-agency-confirms-breach-as-hacker-offer...
343•robtherobber•8h ago•121 comments

Advanced Packaging Limits Come into Focus

https://semiengineering.com/advanced-packaging-limits-come-into-focus/
27•PaulHoule•2d ago•5 comments

Using the internet like it's 1999

https://joshblais.com/blog/using-the-internet-like-its-1999/
92•joshuablais•3h ago•60 comments

Writing a C Compiler, in Zig (2025)

https://ar-ms.me/thoughts/c-compiler-1-zig/
132•tosh•14h ago•36 comments

Arch Linux Now Has a Bit-for-Bit Reproducible Docker Image

https://antiz.fr/blog/archlinux-now-has-a-reproducible-docker-image/
294•maxloh•22h ago•103 comments

I spent years trying to make CSS states predictable

https://tenphi.me/blog/why-i-spent-years-trying-to-make-css-states-predictable/
40•tenphi•11h ago•9 comments

Alberta startup sells no-tech tractors for half price

https://wheelfront.com/this-alberta-startup-sells-no-tech-tractors-for-half-price/
2138•Kaibeezy•1d ago•731 comments

WireGuard for Windows Reaches v1.0

https://lists.zx2c4.com/pipermail/wireguard/2026-April/009580.html
85•zx2c4•2d ago•5 comments

A Renaissance gambling dispute spawned probability theory

https://www.scientificamerican.com/article/how-a-renaissance-gambling-dispute-spawned-probability...
96•sohkamyung•2d ago•15 comments

Jiga (YC W21) Is Hiring

https://jiga.io/about-us/
1•grmmph•12h ago

If America's so rich, how'd it get so sad?

https://www.derekthompson.org/p/if-americas-so-rich-howd-it-get-so
407•momentmaker•7h ago•731 comments
Open in hackernews

Building an agentic image generator that improves itself

https://simulate.trybezel.com/research/image_agent
67•palashshah•11mo ago
Hey HN! We recently graduated from YC, and have been building customer personas for large e-commerce companies. We recently expanded into the image generation space, and have been working on research about how to automatically improve the quality of generated images.

Comments

average_r_user•11mo ago
Quite interesting, do you have some documentation of your platform and capabilities? Your landing page is quite synthetic
palashshah•11mo ago
hey! we're working with an initial set of customers, and plan to launch full capabilities soon. stay tuned :)
ramesh31•11mo ago
This is a wonderful writeup of building a simple agentic system in general. What OP describes is more or less the bare minimum you should be doing at this point to get good (consistent) results from an LLM; single-shot prompting is a thing of the past.
palashshah•11mo ago
appreciate the compliment! yep, it's definitely necessary and is the bare minimum for building image generation systems in production.
shmoogy•11mo ago
I'm surprised you landed on using o3 as the judge - we found it way too expensive. I use llm as a judge for generating color variations of products, definitely hoping for some improvements - it can be brutal to get non hallucinated features along with proper final rendering.
omneity•11mo ago
Have you tried open weights vision models such as Qwen VL, MiniCPM, PaliGemma...?

I'm also curious how usable are simpler vision models such as Florence in case you explored this direction.

palashshah•11mo ago
we're currently in the process of doing this. i think something that could potentially work is to iterate upon the initial image composition / structure using cheaper models, and then upscale at the end. this way you're saving on that iteration cost, but eventually land on a higher-scale image.
shmoogy•11mo ago
I actually haven't but nova from Amazon was surprisingly good at things like bounding boxes compared to some others You kind of have to test and measure so many different aspects to get the best at specific tasks Thanks for the idea
elif•11mo ago
This is great and provides a good starting point for any similar efforts.

However I think the temptation to lean all tasks on AI is perhaps a little naive if not lazy.

For mask generation, there is really not much reason to use AI. In this example, simple stochastic blob detection, a trivial function you could get from openCV or ask a college sophomore to write would generate much better quality masks.

palashshah•11mo ago
totally agreed here. i think my goal primarily with the mask generation was to test out how effective openai's capabilities were.

we're currently working on pipelines that limit the the involvement of AI to various tasks. for example, when generating an ad there's usually logo, some banner text, and background image.

we can use gpt-image-1 to generate the background image, another LLM to identify the coordinates of where we place the logo, and just add the logo onto the image. this is just one example!

jackphilson•11mo ago
Why do you agree? I think we should outsource as much as we can to abstraction. We've been doing it forever.
dandelany•11mo ago
"Simple stochastic blob detection" is an abstraction. You write (or import) a function where the the gnarly logic lives and call `detectBlobs()`. "Use an abstraction" doesn't mean you should use the same abstraction for every task, you should use the right tool for the job.
mentalgear•11mo ago
Again another example of "the unreasonable effectiveness of LLMs in a loop". At with time, the tasks for loop become bigger and more complex, until we find ourselves "outlooped" at least job wise.
ramoz•11mo ago
Nice retrospective but I guess this process is no longer needed as model's get better; esp as they start enabling features like consistent subjects. Seems like a lot of overhead to correct text for inspirational images, but I can imagine you need to always present some form of _quality_ to your clients.

Feel like control nets and some minimal photoshop work would've been better.

palashshah•11mo ago
totally. it got to a point where most of the text generated in our images was incorrect, and so it wasn't a great look showing that to our clients.

we're actually working on some form of what you described where we take images generated from LLMs + add consistent logos discretely rather than generatively.

abshkbh•11mo ago
Palash this is a great post, I learnt a lot as an image gen noob! Keep writing more :)
palashshah•11mo ago
this is incredible to hear! i plan to keep writing on a weekly basis, and will be posting them on twitter.
t_mann•11mo ago
I was kind of hoping this would be in the 'Dreambooth mold' of finetuning open weights models. I have used that with some success some ~2 years ago, does anyone know what improvements there have been in that direction since Dreambooth?
zahlman•11mo ago
It's frankly amazing to me that "ask another LLM to evaluate the image" actually produces useful feedback that results in actual improvement from the first LLM.

But then, I guess it's not much different of an idea from the earlier use of GANs, or of telling LLMs to "stop hallucinating", etc.

palashshah•11mo ago
totally. the way i think about it (purely based on intuition) is that asking an LLM to do understanding + image generation is too complex for it to be effective. if we separate out the tasks into discrete steps, the evaluation becomes better, and the generation simply becomes instruction following.
jacob019•11mo ago
This is all edited with gpt-image-1? The revised images are amazing. Were example logos provided or is it just working off of it's knowledge of a well known brand?