Hacker News: Newest

French musician Kavinsky found dead

bristleworm — Wed, 29 Jul 2026 11:54:37 +0000

Article URL: https://www.euronews.com/culture/2026/07/29/dj-kavinsky-known-for-his-track-nightcall-found-dead-at-his-paris-home

Comments URL: https://news.ycombinator.com/item?id=49096290

Points: 163

# Comments: 36

Document-borne AI worms can self-propagate through Copilot for Word

Canopy9560 — Wed, 29 Jul 2026 11:44:33 +0000

Article URL: https://enklypesalt.com/posts/context-collapse-part3-ai-worming-through-word/

Comments URL: https://news.ycombinator.com/item?id=49096188

Points: 143

# Comments: 120

KOReader

Cider9986 — Wed, 29 Jul 2026 11:05:08 +0000

Article URL: https://koreader.rocks/

Comments URL: https://news.ycombinator.com/item?id=49095865

Points: 283

# Comments: 100

SQLite in Production: Optimizing WAL Mode, Concurrency, and VFS Layers

ankitg12 — Wed, 29 Jul 2026 07:18:24 +0000

Article URL: https://micrologics.org/blog/sqlite-in-production-optimizing-wal-mode-concurrency-and-vfs-layers-for-low-latency-app-servers

Comments URL: https://news.ycombinator.com/item?id=49094346

Points: 146

# Comments: 53

More Tailscale tricks for your jailbroken Kindle

Error6571 — Wed, 29 Jul 2026 04:58:46 +0000

Article URL: https://tailscale.com/blog/jailbroken-kindle-proxy-tun-modes

Comments URL: https://news.ycombinator.com/item?id=49093569

Points: 301

# Comments: 96

User Interfaces of the Demo Scene

zdw — Wed, 29 Jul 2026 04:30:36 +0000

Article URL: https://www.datagubbe.se/scenegui/

Comments URL: https://news.ycombinator.com/item?id=49093434

Points: 299

# Comments: 51

LearnVector – Andrew Ng's AI company building one‑to‑one learning experiences

ajhai — Wed, 29 Jul 2026 01:49:19 +0000

Article URL: https://learnvector.ai/

Comments URL: https://news.ycombinator.com/item?id=49092499

Points: 238

# Comments: 152

Multiple Mouse Cursors in Wayland

marvinborner — Wed, 29 Jul 2026 00:59:37 +0000

Article URL: https://blinry.org/multi-seat-wayland/

Comments URL: https://news.ycombinator.com/item?id=49092112

Points: 151

# Comments: 103

Hubble: Open-source notetaking app for you and your agents

handfuloflight — Wed, 29 Jul 2026 00:11:23 +0000

Article URL: https://www.hubble.md/

Comments URL: https://news.ycombinator.com/item?id=49091730

Points: 137

# Comments: 63

ReFrame – The EPaper Camera

phil294 — Tue, 28 Jul 2026 23:27:09 +0000

Article URL: https://reframe.camera/

Comments URL: https://news.ycombinator.com/item?id=49091379

Points: 178

# Comments: 40

Underwater oxygen loss threatens earth's stability, researchers warn

littlexsparkee — Tue, 28 Jul 2026 22:31:14 +0000

Article URL: https://scripps.ucsd.edu/news/underwater-oxygen-loss-threatens-earths-stability-researchers-warn

Comments URL: https://news.ycombinator.com/item?id=49090867

Points: 162

# Comments: 86

Show HN: I was tired of opening 2 tabs for every HN link, so I made a userscript

twalichiewicz — Tue, 28 Jul 2026 22:09:06 +0000

HN is great for the links people share, but a big part of the value I get comes from reading the discussion around them. I realized I was always opening the article in one tab and the comments in another, constantly switching back and forth.

I figured there was probably a simpler way, so I threw together this userscript to merge the two.

1. Clicking a link from Hacker News opens the article with a side panel containing the discussion. It doesn't require your credentials, is resizable, and is easy to tweak if you want to customize it.

2. If you land on an article that has previously been shared on HN, the script finds the existing discussion and adds a button in the top-right to open the panel.

Feedback welcome.

Comments URL: https://news.ycombinator.com/item?id=49090607

Points: 374

# Comments: 103

Running Kimi K3 on a M1 Max

tito — Tue, 28 Jul 2026 21:35:19 +0000

Article URL: https://github.com/gavamedia/deltafin

Comments URL: https://news.ycombinator.com/item?id=49090233

Points: 133

# Comments: 89

Half-Life ported to Mac OS 9

freediver — Tue, 28 Jul 2026 20:58:39 +0000

Article URL: https://mac-classic.com/news/half-life-ported-to-mac-os-9/

Comments URL: https://news.ycombinator.com/item?id=49089814

Points: 284

# Comments: 136

Codex Security

bakigul — Tue, 28 Jul 2026 20:52:55 +0000

Article URL: https://github.com/openai/codex-security

Comments URL: https://news.ycombinator.com/item?id=49089755

Points: 553

# Comments: 200

Pacing the frontier

reducesuffering — Tue, 28 Jul 2026 20:09:09 +0000

Article URL: https://www.pacingthefrontier.com/

Comments URL: https://news.ycombinator.com/item?id=49089240

Points: 134

# Comments: 186

Uv 0.12.0

hallvard — Tue, 28 Jul 2026 19:41:33 +0000

Article URL: https://github.com/astral-sh/uv/releases/tag/0.12.0

Comments URL: https://news.ycombinator.com/item?id=49088887

Points: 128

# Comments: 42

Donate to GrapheneOS

charliebwrites — Tue, 28 Jul 2026 19:06:10 +0000

Article URL: https://grapheneos.org/donate

Comments URL: https://news.ycombinator.com/item?id=49088451

Points: 247

# Comments: 80

Deflock Casa Grande

mooreds — Tue, 28 Jul 2026 18:41:48 +0000

Article URL: https://deflockcg.com/

Comments URL: https://news.ycombinator.com/item?id=49088148

Points: 256

# Comments: 105

MCP 2026-07-28 Specification: transport going stateless

Eldodi — Tue, 28 Jul 2026 18:35:11 +0000

Article URL: https://blog.modelcontextprotocol.io/posts/2026-07-28/

Comments URL: https://news.ycombinator.com/item?id=49088058

Points: 121

# Comments: 38

The iPhone Upgrade Program is being replaced by Apple Upgrade

lkurtz — Tue, 28 Jul 2026 17:37:12 +0000

https://www.apple.com/shop/apple-upgrade

Comments URL: https://news.ycombinator.com/item?id=49087306

Points: 195

# Comments: 356

Discovering Cryptographic Weaknesses with Claude

gslin — Tue, 28 Jul 2026 17:22:16 +0000

Article URL: https://www.anthropic.com/research/discovering-cryptographic-weaknesses

Comments URL: https://news.ycombinator.com/item?id=49087091

Points: 222

# Comments: 169

Steel Bank Common Lisp version 2.6.7

tmtvl — Tue, 28 Jul 2026 17:11:54 +0000

Article URL: https://sbcl.org/all-news.html?2.6.7

Comments URL: https://news.ycombinator.com/item?id=49086971

Points: 255

# Comments: 123

Substack writers, you need a website

speckx — Tue, 28 Jul 2026 16:58:31 +0000

Article URL: https://elizabethtai.com/2026/06/10/substack-writers-you-need-a-website/

Comments URL: https://news.ycombinator.com/item?id=49086788

Points: 602

# Comments: 317

A walk through of the DeltaNet family of linear attention variants

AnhTho_FR — Tue, 28 Jul 2026 16:02:07 +0000

Article URL: https://blog.doubleword.ai/you-could-have-come-up-with-kimi-delta-attention

Comments URL: https://news.ycombinator.com/item?id=49085909

Points: 293

# Comments: 123

How Do I Profile eBPF Code?

snaveen — Tue, 28 Jul 2026 15:55:44 +0000

Article URL: https://naveensrinivasan.com/posts/2026-07-22-how-do-i-profile-ebpf-code/

Comments URL: https://news.ycombinator.com/item?id=49085811

Points: 118

# Comments: 7

Show HN: XY – A Fast, composable, GPU-accelerated interactive plotting library

apetuskey — Tue, 28 Jul 2026 15:54:55 +0000

Article URL: https://github.com/reflex-dev/xy

Comments URL: https://news.ycombinator.com/item?id=49085798

Points: 127

# Comments: 46

Delayed Gratification – Proud to Be 'Last to Breaking News'

speerer — Tue, 28 Jul 2026 15:50:38 +0000

Article URL: https://www.slow-journalism.com/

Comments URL: https://news.ycombinator.com/item?id=49085731

Points: 322

# Comments: 186

Kimi K3 Architecture Overview and Notes

ModelForge — Tue, 28 Jul 2026 15:48:34 +0000

Article URL: https://sebastianraschka.com/blog/2026/kimi-k3-architecture-notes.html

Comments URL: https://news.ycombinator.com/item?id=49085698

Points: 477

# Comments: 102

Zig's Incremental Compilation Internals

garyhtou — Tue, 28 Jul 2026 15:46:45 +0000

Article URL: https://mlugg.co.uk/posts/incremental-compilation-internals/

Comments URL: https://news.ycombinator.com/item?id=49085666

Points: 259

# Comments: 199

Harmony Explained: Progress Towards a Scientific Theory of Music (2012)

surprisetalk — Tue, 28 Jul 2026 15:20:35 +0000

Article URL: https://arxiv.org/abs/1202.4212

Comments URL: https://news.ycombinator.com/item?id=49085280

Points: 102

# Comments: 102

GrapheneOS Defends Data-Wiping Function That Blocked US Border Search

pseudolus — Tue, 28 Jul 2026 15:17:38 +0000

Article URL: https://www.pcmag.com/news/grapheneos-defends-data-wiping-function-that-blocked-us-border-search

Comments URL: https://news.ycombinator.com/item?id=49085236

Points: 172

# Comments: 182

Anthropeum – Where in the world, and when, does this human artifact belong?

bookofjoe — Tue, 28 Jul 2026 15:01:15 +0000

Article URL: https://anthropeum.com/

Comments URL: https://news.ycombinator.com/item?id=49084989

Points: 174

# Comments: 46

Now is the time to give LLMs access to the ACM digital library

rbanffy — Tue, 28 Jul 2026 15:01:12 +0000

Article URL: https://cacm.acm.org/opinion/now-is-the-time-to-give-llms-access-to-the-acm-digital-library/

Comments URL: https://news.ycombinator.com/item?id=49084987

Points: 183

# Comments: 152

Stop Killing the Internet: No Digital ID and No Age Verification

doener — Tue, 28 Jul 2026 14:58:15 +0000

Article URL: https://citizens-initiative.europa.eu/initiatives/details/2026/000011_en

Comments URL: https://news.ycombinator.com/item?id=49084938

Points: 641

# Comments: 250

Una GPS smart watch – Repairable, USB-C charging, developer-friendly

pimterry — Tue, 28 Jul 2026 14:48:13 +0000

Article URL: https://unawatch.com/

Comments URL: https://news.ycombinator.com/item?id=49084813

Points: 260

# Comments: 167

I'd not buy a LG monitor

speckx — Tue, 28 Jul 2026 14:46:19 +0000

Article URL: https://beko.famkos.net/2026/07/27/id-not-buy-a-lg-monitor/

Comments URL: https://news.ycombinator.com/item?id=49084787

Points: 167

# Comments: 87

Italy Blocks Reproductive Health Websites Women on Web and Women Help Women

miniBill — Tue, 28 Jul 2026 14:05:51 +0000

Article URL: https://ooni.org/post/2026-italy-blocks-wow-and-whw

Comments URL: https://news.ycombinator.com/item?id=49084091

Points: 114

# Comments: 156

Why a $154B CEO just endorsed stripping most Americans of voting rights

imzadi — Tue, 28 Jul 2026 14:00:37 +0000

Article URL: https://fortune.com/2026/07/27/shopify-ceo-voting-rights-stripping-americans-19th-century/

Comments URL: https://news.ycombinator.com/item?id=49084031

Points: 186

# Comments: 324

New HIV vaccine shows unprecedented success in preclinical study

codebyaditya — Tue, 28 Jul 2026 13:12:01 +0000

Article URL: https://www.lji.org/news-events/news/post/new-hiv-vaccine-shows-unprecedented-success-in-preclinical-study/

Comments URL: https://news.ycombinator.com/item?id=49083314

Points: 634

# Comments: 280

Show HN: Formally verified 3D CSG: Trust 93 lines spec, not 1000 lines AI code

permute — Tue, 28 Jul 2026 13:07:14 +0000

To my knowledge, this is the first formally verified implementation of a 3D constructive solid geometry (CSG) operation: mesh intersection, implemented in Lean 4 and verified against a concise specification that pins down the surface of the resulting mesh exactly and guarantees practical well-formedness conditions on the triangulation.

This project is also an experiment in avoiding having to trust AI-generated code. A human reviewer only needs to read 93 lines of formal specification and run the Lean checker to certify the correctness of the kernel, skipping the intricate 1000+ lines of AI-written implementation. To prove correctness, AI autonomously wrote over 60,000 lines of Lean proofs, which also never have to be inspected by a human. The Lean checker guarantees conformance to the specification at compile time, with zero trust placed in any LLM. This allows us to treat the implementation and proofs as a black box. I guided the agent through the milestones described in the readme to arrive at the result presented here.

Also take a look at the web demo https://schildep.github.io/verified-3d-mesh-intersection/, which runs the verified mesh intersection kernel compiled to WebAssembly in your browser.

Comments URL: https://news.ycombinator.com/item?id=49083239

Points: 110

# Comments: 48

I'm 38 and I Can't Support Myself Anymore

speckx — Tue, 28 Jul 2026 12:34:07 +0000

Article URL: https://itsmevox.substack.com/p/im-38-and-i-cant-support-myself-anymore

Comments URL: https://news.ycombinator.com/item?id=49082857

Points: 244

# Comments: 420

Mondragon Corporation – a federation of co-operatives

brnt — Tue, 28 Jul 2026 12:19:07 +0000

Article URL: https://en.wikipedia.org/wiki/Mondragon_Corporation

Comments URL: https://news.ycombinator.com/item?id=49082695

Points: 172

# Comments: 39

Kimi Linear: An Expressive, Efficient Attention Architecture (2025)

ronfriedhaber — Tue, 28 Jul 2026 10:52:30 +0000

Article URL: https://arxiv.org/abs/2510.26692

Comments URL: https://news.ycombinator.com/item?id=49082022

Points: 297

# Comments: 130

DMARC has been public since 2012 but most company domains still don't enforce it

adulion — Tue, 28 Jul 2026 10:20:50 +0000

Article URL: https://ciphercue.com/blog/dmarc-enforcement-gap-rua-fragmentation-2026

Comments URL: https://news.ycombinator.com/item?id=49081783

Points: 193

# Comments: 144

Google's Beyond Zero: Enterprise Security for the AI Era

jordigg — Tue, 28 Jul 2026 09:59:13 +0000

Article URL: https://spawn-queue.acm.org/doi/10.1145/3819083

Comments URL: https://news.ycombinator.com/item?id=49081644

Points: 152

# Comments: 77

About the security content of macOS Tahoe 26.6

andor — Tue, 28 Jul 2026 09:45:43 +0000

Article URL: https://support.apple.com/en-us/128067

Comments URL: https://news.ycombinator.com/item?id=49081555

Points: 206

# Comments: 138

7.1 Earthquake in Japan

krembo — Tue, 28 Jul 2026 07:44:24 +0000

Article URL: https://www.data.jma.go.jp/multi/quake/quake_detail.html?eventID=20260728163528&lang=en

Comments URL: https://news.ycombinator.com/item?id=49080664

Points: 795

# Comments: 219

Ars Astronomica – English translations of rare Hebrew and Latin astronomy texts

sweisman — Tue, 28 Jul 2026 05:25:34 +0000

Article URL: https://arsastronomica.com/

Comments URL: https://news.ycombinator.com/item?id=49079727

Points: 105

# Comments: 50

Neutrino-1 8B

handfuloflight — Tue, 28 Jul 2026 04:49:54 +0000

Article URL: https://www.fermionresearch.com/models/neutrino-8b/

Comments URL: https://news.ycombinator.com/item?id=49079490

Points: 108

# Comments: 46

Using an open model feels surprisingly good

msaltz — Tue, 28 Jul 2026 02:37:14 +0000

Article URL: https://matthewsaltz.com/blog/using-an-open-model-feels-surprisingly-good/

Comments URL: https://news.ycombinator.com/item?id=49078583

Points: 314

# Comments: 141

An Uncomplicated Man – A review of The Odyssey, directed by Christopher Nolan

andsoitis — Tue, 28 Jul 2026 02:35:28 +0000

Article URL: https://www.lrb.co.uk/the-paper/v48/n14/emily-wilson/an-uncomplicated-man

Comments URL: https://news.ycombinator.com/item?id=49078575

Points: 138

# Comments: 161

A $500 RL fine-tune of a 9B open model beat frontier models on catalog review

ilreb — Tue, 28 Jul 2026 02:18:53 +0000

Article URL: https://fermisense.com/when-machines-take-the-wheel/

Comments URL: https://news.ycombinator.com/item?id=49078454

Points: 326

# Comments: 126

Vehicle Motion Cues

Austin_Conlon — Tue, 28 Jul 2026 01:13:26 +0000

Article URL: https://support.apple.com/guide/iphone/iphone-comfortably-riding-a-vehicle-iph55564cb22/ios

Comments URL: https://news.ycombinator.com/item?id=49077999

Points: 203

# Comments: 107

Netflix employee fired for sharing personal details in retreat trust exercise

softwaredoug — Mon, 27 Jul 2026 23:21:37 +0000

https://www.inc.com/amaya-nichole/netflix-company-retreat-sp...

Comments URL: https://news.ycombinator.com/item?id=49076923

Points: 429

# Comments: 489

Astronauts describe persistent 'observer' sensation after 6 month missions

zdw — Mon, 27 Jul 2026 23:19:19 +0000

Article URL: https://spacedaily.com/sd-v-astronauts-returning-from-six-month-missions-describe-a-persistent-observer-sensation-the-feeling-of-watching-their-own-lives-from-a-half-step-outside-the-frame-weeks-after-theyr/

Comments URL: https://news.ycombinator.com/item?id=49076900

Points: 182

# Comments: 107

DConf 2026 in London

teleforce — Mon, 27 Jul 2026 23:14:19 +0000

Article URL: https://dconf.org/2026/index.html

Comments URL: https://news.ycombinator.com/item?id=49076840

Points: 117

# Comments: 60

Kimi K3 Now Available via Telnyx Inference API

fionaattelnyx — Mon, 27 Jul 2026 22:46:28 +0000

Moonshot AI released open weights for Kimi K3 today and it's live on Telnyx Inference. The architecture and Moonshot's own benchmarks are in their technical blog. This post is about running it on Telnyx.

What we are adding: K3 is now available via the Telnyx Inference API, hosted on GPUs that we own and operate.

This matters due to the size of this model. A 2.8T model needs dedicated infra to serve well. Because we own and operate the GPUs, we can contorl throughput. with no inter-provider hops and no cloud tenant, latency is minimized. We have GPUs in each of the US, EU, APAC, and MENA. Inference runs in the region you pick, with zero data retention. We do not store prompts or completions after the response returns. Because we own the infra, the per-token price reflects the cost of running the model, not the cost of renting someone else's plus their margin.

We have not benchmarked K3 ourselves yet. Moonshot's own numbers and early third-party evaluations put it at frontier level for coding and agentic work, trailing only Claude Fable 5 and GPT 5.6 Sol on aggregate. Full breakdown in their blog.

Pricing on Telnyx: $2.70/1M input tokens, $13.50/1M output tokens, $0.27/1M cached input tokens. Prompt caching enabled by default. Served via an OpenAI-compatible endpoint so you can test easily.

Model ID: [MODEL_ID] API: https://api.telnyx.com/v2/ai/chat/completions Docs: https://developers.telnyx.com/docs/inference Technical blog (Moonshot): https://www.kimi.com/blog/kimi-k3

Comments URL: https://news.ycombinator.com/item?id=49076505

Points: 129

# Comments: 88

Benchmarking Opus 5 on SlopCodeBench

dhorthy — Mon, 27 Jul 2026 22:37:52 +0000

Article URL: https://github.com/humanlayer/advanced-context-engineering-for-coding-agents/blob/main/benchmarking-opus-5-on-slop-code-bench.md

Comments URL: https://news.ycombinator.com/item?id=49076391

Points: 397

# Comments: 117

A missing underscore sent innocent man to prison for 18 months

quantified — Mon, 27 Jul 2026 22:10:15 +0000

Article URL: https://arstechnica.com/tech-policy/2026/07/police-missed-one-underscore-and-sent-the-wrong-man-to-prison/

Comments URL: https://news.ycombinator.com/item?id=49076116

Points: 391

# Comments: 273

Our position on open-weights models

surprisetalk — Mon, 27 Jul 2026 22:03:49 +0000

Article URL: https://www.anthropic.com/news/position-open-weights-models

Comments URL: https://news.ycombinator.com/item?id=49076057

Points: 1161

# Comments: 1713

US DOT deleting bike lane references

aendruk — Mon, 27 Jul 2026 20:50:58 +0000

Article URL: https://www.npr.org/2026/07/23/nx-s1-5900901/bike-lanes-dot-websites

Comments URL: https://news.ycombinator.com/item?id=49075350

Points: 113

# Comments: 105

Forth

beardyw — Mon, 27 Jul 2026 20:15:50 +0000

Article URL: https://xkcd.com/3277/

Comments URL: https://news.ycombinator.com/item?id=49074991

Points: 221

# Comments: 51

Professor's invisible prompt trap catches 32/35 students cheating with AI

leephillips — Mon, 27 Jul 2026 19:46:05 +0000

Article URL: https://www.techspot.com/news/113243-professor-invisible-prompt-trap-catches-32-students-cheating.html

Comments URL: https://news.ycombinator.com/item?id=49074680

Points: 105

# Comments: 88

Self-contained highly-portable Python distributions

jcbhmr — Mon, 27 Jul 2026 18:43:31 +0000

Article URL: https://gregoryszorc.com/docs/python-build-standalone/main/

Comments URL: https://news.ycombinator.com/item?id=49073942

Points: 162

# Comments: 38

Show HN: Yap – OSS on-device voice dictation for macOS with no model to download

pancomplex — Mon, 27 Jul 2026 18:36:02 +0000

Hey HN! I wanted to share this OSS project I've been working on.

It's called Yap and its a small menu-bar app for macOS that does voice to text for any input. You'll set a hotkey, press it, talk, press it again, and the text gets pasted into whatever field you were in. Everything runs locally and never leaves your computer. Fully OSS and MIT licensed.

With macOS 26, Apple recently added two new APIs, SpeechAnalyzer and SpeechTranscriber, that do streaming on-device speech to text using models the OS ships and manages. So the app ships no model of its own and loads nothing before the first word. A recent benchmark put Apple's model slightly ahead of Whisper Small on accuracy and about 3x faster (see: https://news.ycombinator.com/item?id=48894752). On Mac, there's really no need anymore to download models or pay for expensive APIs.

A lot of existing dictation tools do one of a few things I wanted to avoid with this OSS project. They either:

- cost money (for something that's literally built into the OS)

- bundle memory-intensive models (e.g. Whisper or Parakeet)

- webapps wrapped in Electron

- Intel macs straight up don't work

- closed source

- use third-party APIs that will have access to all your transcripts

It's around 3,000 lines of native Swift in a 4 MB app and idles near 60 MB of memory. Audio comes off AVAudioEngine into SpeechAnalyzer with volatile results turned on for the live preview, history is stored in SwiftData. There's no network code in it at all.

Repo and a demo available here: https://github.com/FrigadeHQ/yap

Happy to answer questions and would love to hear any feature requests!

Comments URL: https://news.ycombinator.com/item?id=49073834

Points: 102

# Comments: 42

The Artist Who Colored Ghibli

herbertl — Mon, 27 Jul 2026 18:32:09 +0000

Article URL: https://animationobsessive.substack.com/p/the-artist-who-colored-ghibli

Comments URL: https://news.ycombinator.com/item?id=49073785

Points: 130

# Comments: 14

Judge Rejects Google's Attempt to DMCA Its Way Out of Being Scraped

cdrnsf — Mon, 27 Jul 2026 18:15:35 +0000

Article URL: https://www.techdirt.com/2026/07/27/judge-rejects-googles-attempt-to-dmca-its-way-out-of-being-scraped/

Comments URL: https://news.ycombinator.com/item?id=49073513

Points: 337

# Comments: 151

Canceling "Hey"

ChadNauseam — Mon, 27 Jul 2026 17:37:02 +0000

Article URL: https://chadnauseam.com/random/cancelling-my-hey

Comments URL: https://news.ycombinator.com/item?id=49073007

Points: 288

# Comments: 251

Show HN: FeyNoBg – Automatic background removal model and training library

snyy — Mon, 27 Jul 2026 16:59:08 +0000

Hey HN, I’m Shreyash from Feyn. We help companies build custom models from their data.

Today, we’re releasing FeyNoBg, an automatic background removal model. Alongside it, we're open-sourcing NoBg, the Python library we built to train and run it.

Try the model here: https://huggingface.co/spaces/feyninc/feynobg. Check out the library here: https://github.com/feyninc/nobg

Some sample outputs:

(1) Soccer Freekick: https://drive.google.com/file/d/1MZkAGLwbhNVOZ0Oi7XvpCfSEu9Q...

(2) Hair in wind: https://drive.google.com/file/d/1Odc2m0XMVH9uZtvI_KjaRbXzhLL...

(3) Bicycle with visible spokes: https://drive.google.com/file/d/1h99ahjfrtS1MFQJJgiKE2fuM3HZ...

(4) Live Demo video: https://youtu.be/b1heHPvY8BM

Background removal separates an image's subject from its surrounding. We've all tried it at some point. Often it is to reuse the subject in a different artifact. Nowadays, it is common to make chat stickers out of it. It is one of the most common but under-appreciated uses of AI. It is also surprisingly complex. Models can be easily confused by camouflage, motion blur, or fine structures like hair.

The task requires two skills. First, a model has to identify the foreground. Second, it has to trace the foreground’s boundary and estimate an opacity value for each pixel. Generally, these skills are taught with different datasets. That creates a failure point. A poor training mix can improve one skill at the expense of the other. We saw this in our controlled evaluation. A training run with just the MaskFactory dataset improved on the CAMO benchmark but regressed on DIS5K.

For FeyNoBg, we took an interpretability-first approach to training. We first studied how BiRefNet’s stages contribute to finding the foreground and reconstructing its boundary. We discovered that the third stage of it's feature extractor holds a lot of information. Both localization and boundary reconstruction depend heavily on the feature map produced here.

This led us to expand this stage from 18 to 24 blocks while preserving the pre-trained weights. We then trained FeyNoBg on 26.1K diverse examples assembled from 10 datasets. The goal was to improve foreground identification and boundary precision without sacrificing either one.

Across eight benchmarks, FeyNoBg achieves the best published score on four and comes within 2% of the leader on the rest.

Building FeyNoBg also exposed a tooling problem. Image matting models are usually released as isolated repositories with incompatible preprocessing, training, and evaluation code. We built NoBg to solve this. NoBg puts these workflows behind one Python interface. It supports BiRefNet today, with more architectures coming. We hope you build something exciting with it!

Happy to answer any questions!

Comments URL: https://news.ycombinator.com/item?id=49072462

Points: 118

# Comments: 29

MAI-Cyber-1-Flash inside MDASH

migmartri — Mon, 27 Jul 2026 16:52:22 +0000

Article URL: https://microsoft.ai/news/introducing-mai-cyber-1-flash-inside-mdash/

Comments URL: https://news.ycombinator.com/item?id=49072361

Points: 239

# Comments: 110

Decathlon Germany adds Wero payment option to decathlon.de website

doener — Mon, 27 Jul 2026 16:49:08 +0000

Article URL: https://www.sgieurope.com/e-commerce/decathlon-germany-launches-wero-payment-on-its-website/122397.article

Comments URL: https://news.ycombinator.com/item?id=49072310

Points: 334

# Comments: 228

Kimi-K3 Technical Report [pdf]

vinhnx — Mon, 27 Jul 2026 15:23:45 +0000

Related: Kimi-K3 on HuggingFace - https://news.ycombinator.com/item?id=49065752

Comments URL: https://news.ycombinator.com/item?id=49070985

Points: 390

# Comments: 180

Exploiting Volvo/Eicher's fleet platform to gain control over all users/vehicles

EatonZ — Mon, 27 Jul 2026 15:08:16 +0000

Article URL: https://eaton-works.com/2026/07/27/my-eicher-hack/

Comments URL: https://news.ycombinator.com/item?id=49070756

Points: 162

# Comments: 60

Apple Will 'Watch Everything Burn' When the AI Bubble Bursts

thm — Mon, 27 Jul 2026 14:42:41 +0000

Article URL: https://www.macrumors.com/2026/07/27/ed-zitron-apple-watch-it-burn-ai-bubble-bursts/

Comments URL: https://news.ycombinator.com/item?id=49070427

Points: 252

# Comments: 353

Paged Out #9 [pdf]

laurensr — Mon, 27 Jul 2026 14:22:34 +0000

Article URL: https://pagedout.institute/download/PagedOut_009.pdf

Comments URL: https://news.ycombinator.com/item?id=49070138

Points: 279

# Comments: 31

AI companies spend record sums on Washington lobbying

1vuio0pswjnm7 — Mon, 27 Jul 2026 14:07:48 +0000

https://archive.ph/PASMJ

Comments URL: https://news.ycombinator.com/item?id=49069939

Points: 277

# Comments: 144

Should you wash your solar panels?

surprisetalk — Mon, 27 Jul 2026 13:04:11 +0000

Article URL: https://incoherency.co.uk/blog/stories/should-you-wash-your-solar-panels.html

Comments URL: https://news.ycombinator.com/item?id=49069132

Points: 244

# Comments: 245

Truth is not a direction: a Tarski attack on LLM probes

abelaer — Mon, 27 Jul 2026 12:56:36 +0000

Article URL: https://abeljansma.nl/2026/07/10/truth-is-not-a-direction.html

Comments URL: https://news.ycombinator.com/item?id=49069033

Points: 106

# Comments: 73

AI companies are shredding rare books

anon373839 — Mon, 27 Jul 2026 12:32:12 +0000

https://xcancel.com/HedgieMarkets/status/2081534588485296565

Comments URL: https://news.ycombinator.com/item?id=49068738

Points: 789

# Comments: 510

Worse on Purpose

bookofjoe — Mon, 27 Jul 2026 12:29:14 +0000

Article URL: https://ledger.worseonpurpose.com/brands

Comments URL: https://news.ycombinator.com/item?id=49068707

Points: 104

# Comments: 83

Elevated errors on Claude Opus 5

croemer — Mon, 27 Jul 2026 11:32:32 +0000

Article URL: https://status.claude.com/incidents/mfdtrknpxghq

Comments URL: https://news.ycombinator.com/item?id=49068029

Points: 103

# Comments: 74

How is the Bun rewrite in Rust going?

tomlockwood — Mon, 27 Jul 2026 11:12:26 +0000

Article URL: https://lockwood.dev/ai/2026/07/27/how-is-the-bun-rewrite-in-rust-going.html

Comments URL: https://news.ycombinator.com/item?id=49067854

Points: 491

# Comments: 384

Libsm64: Mario 64 as a library for use in external game engines

klaussilveira — Mon, 27 Jul 2026 10:04:48 +0000

Article URL: https://github.com/libsm64/libsm64

Comments URL: https://news.ycombinator.com/item?id=49067352

Points: 194

# Comments: 24

Removing React.js from the codebase and adapting Htmx for UI interactivity (2023)

Ralfp — Mon, 27 Jul 2026 09:58:50 +0000

Article URL: https://misago-project.org/t/removing-reactjs-from-the-codebase-and-adapting-htmx-for-ui-interactivity/1267/

Comments URL: https://news.ycombinator.com/item?id=49067301

Points: 252

# Comments: 192

Why I Left Google DeepMind

eatitraw — Mon, 27 Jul 2026 09:56:37 +0000

Article URL: https://www.lesswrong.com/posts/iKm2FhpWkuuBojm82/why-i-left-google-deepmind

Comments URL: https://news.ycombinator.com/item?id=49067285

Points: 196

# Comments: 58

Chinese chipmaker shares surge 470%

pingou — Mon, 27 Jul 2026 09:11:59 +0000

Article URL: https://www.bbc.com/news/articles/c9q9w3x9qn2o

Comments URL: https://news.ycombinator.com/item?id=49066962

Points: 216

# Comments: 191

VLC for Unity now supported on Linux

martz — Mon, 27 Jul 2026 09:06:34 +0000

Article URL: https://code.videolan.org/videolan/vlc-unity

Comments URL: https://news.ycombinator.com/item?id=49066928

Points: 168

# Comments: 54

Modern email can be built from borrowed parts

andros — Mon, 27 Jul 2026 08:27:21 +0000

Article URL: https://en.andros.dev/blog/d7ed8b07/modern-email-can-be-built-from-borrowed-parts/

Comments URL: https://news.ycombinator.com/item?id=49066639

Points: 194

# Comments: 156

Kimi-K3 on HuggingFace

nateb2022 — Mon, 27 Jul 2026 06:18:10 +0000

Related: Kimi-K3 Technical Report [pdf] - https://news.ycombinator.com/item?id=49070985

Comments URL: https://news.ycombinator.com/item?id=49065752

Points: 1373

# Comments: 540

PGSimCity - How PostgreSQL Works

jonbaer — Mon, 27 Jul 2026 00:19:04 +0000

Article URL: https://nikolays.github.io/PGSimCity/

Comments URL: https://news.ycombinator.com/item?id=49063754

Points: 916

# Comments: 89

Fonts In Use – Find out where a font is used

open_ — Sun, 26 Jul 2026 23:45:09 +0000

Article URL: https://fontsinuse.com/

Comments URL: https://news.ycombinator.com/item?id=49063523

Points: 115

# Comments: 14

Scriptc by Vercel: TypeScript-to-Native compiler, no JavaScript engine in binary

maxloh — Sun, 26 Jul 2026 22:46:10 +0000

Article URL: https://github.com/vercel-labs/scriptc

Comments URL: https://news.ycombinator.com/item?id=49063175

Points: 281

# Comments: 155

US citizen charged after GrapheneOS phone wipes during airport search

eecc — Sun, 26 Jul 2026 22:21:41 +0000

Article URL: https://www.techspot.com/news/113236-us-prosecutors-charge-atlanta-man-after-grapheneos-phone.html

Comments URL: https://news.ycombinator.com/item?id=49063022

Points: 1321

# Comments: 1107

Teaching Kids Forth

rbanffy — Sun, 26 Jul 2026 21:39:17 +0000

Article URL: https://gracefulliberty.com/articles/teaching-kids-forth/

Comments URL: https://news.ycombinator.com/item?id=49062700

Points: 110

# Comments: 64

We have proof automation now

zdw — Sun, 26 Jul 2026 20:53:26 +0000

Article URL: https://www.imperialviolet.org/2026/07/26/zstd-lean.html

Comments URL: https://news.ycombinator.com/item?id=49062291

Points: 231

# Comments: 109

Simulate cassette tape audio profiles using FFmpeg

xterminal — Sun, 26 Jul 2026 20:02:15 +0000

Article URL: https://github.com/AARomanov1985/Audio-Cassette-Simulation

Comments URL: https://news.ycombinator.com/item?id=49061887

Points: 173

# Comments: 77

What does GitHub's security team even do?

theorchid — Sun, 26 Jul 2026 19:51:05 +0000

Article URL: https://orchidfiles.com/github-security-team/

Comments URL: https://news.ycombinator.com/item?id=49061769

Points: 113

# Comments: 32

The Strongest El Niño Ever

ndsipa_pomu — Sun, 26 Jul 2026 18:35:36 +0000

Article URL: https://www.theclimatebrink.com/p/the-strongest-el-nino-ever

Comments URL: https://news.ycombinator.com/item?id=49060978

Points: 287

# Comments: 342

How to Block Some of the Bots

Bender — Sun, 26 Jul 2026 18:32:46 +0000

Article URL: https://nochan.net/b/Internet-Crap/20260606-How-To-Block-Some-Of-The-Bots/

Comments URL: https://news.ycombinator.com/item?id=49060945

Points: 129

# Comments: 147