Sleep regularity is a stronger predictor of mortality risk than sleep duration (2023)

Mysteries of Telegram Data Centers

J-space comparisons across open models

Measuring neural network layers' influence on token probabilities via residual stream nudges reveals early layers have longest-lasting effects, middle layers act as a workspace (via CKA/PR metrics), and structural patterns like decay cliffs at ρ≈0.6-0.7 persist across models and training scales.

Prioritize mental health, and why communication is so important

Struggling with severe depression and career setbacks, the user acknowledges personal challenges in motivation and discipline, now focusing on healing with support. They seek stability, improved work discipline, and meaningful contributions while navigating mental health.
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Show HN: misa77 - a codec that decodes 2x faster than LZ4 (at better ratios)

https://raw.githubusercontent.com/welcome-to-the-sunny-side/misa77/main/misc/lzbench-results-archive/0.2.0/speedup_vs_lz4.png
misa77 is an LZ-based codec that targets the write-once, read-many niche. In particular, it aims to satisfy the following criteria: Modest compression ratios (it has no entropy backend, so one can obviously not compare it to something like zstd, but LZ4 at high effort levels is a good reference point). Constant memory use, regardless of input size (<= 5 MB across all compression modes, and ...

Jurassic Park computers in excruciating detail

https://fabiensanglard.net/jurrasic_park_computers/00_11_15_Apple_Powerbook_100.webp
The author meticulously analyzed Jurassic Park's computers, detailing models like Apple Powerbooks, SGI workstations, and custom software, while noting real hardware used in the 1993 film. They also paid tribute to Sam Neill, who portrayed Alan Grant.

The well-calibrated Bayesian [pdf] (1982)

Coherent Bayesian forecasters expect perfect calibration, aligning predicted probabilities with outcomes, but this undermines coherence theory by ignoring potential miscalibration. Meteorological applications show that recalibration efforts contradict Bayesian coherence principles.

Open-source memory for coding agents, synced over SSH

https://raw.githubusercontent.com/vshulcz/deja-vu/main/assets/demo.gif
Claude Code, Codex and opencode write every conversation to local files — gigabytes of debugged problems and design decisions you can't search. deja is a zero-dependency binary that turns those histories into a memory layer: deja "connection pool exhausted" — 7–9 ms over gigabytes, retroactive: months of logs from before you installed it recall tool — the agent answers "we ...

Running Gemma 4 26B at 5 tokens/SEC on a 13-year-old Xeon with no GPU

https://www.neomindlabs.com/images/we-taught-a-dead-server/gemma4-running.png
A repurposed hp storevirtual box with two ivy bridge xeons, no gpu, fails to run modern inference. claude taylor says the author’s 2016 chip is based on broadwell, but the optimized paths weren’t there to execute the code - so he ran the experiments himself to find out what was wrong... and was correct! if you have pre-avx

Codex Micro

https://images.ctfassets.net/kftzwdyauwt9/3HGigKf8LskSSEMyUJew3T/07616f1ffe40da815b6b76821a065fbb/580946041e76dab35c190ce93f5c0cb61ef4ba3f_1.png?w=3840&q=90&fm=webp
Agent Key offers live RGB status from Codex, a joystick for workflows like PR reviews/debugging, and command keys for shortcuts. It features a dial for adjusting reasoning levels and uses CNC aluminum, PBT keycaps, and mechanical switches.

When A.I. Is a Member of the Family

https://media.newyorker.com/photos/6a4d41a7e3eb7df5ac1c9099/master/w_2560%2Cc_limit/r49710.jpg
The first time the voice kept Cece Ogbuji awake was on a school night in the fall. Cece, who was fifteen, was having a busy week of classes and theatre practice and homework. She needed to sleep. So why was her mother talking so loudly in the next room? “Oh, my God, O.K., so, Sapphire,” her mom said, “let me just tell you this.” Cece knew that the voice didn’t belong to her sister, Zi, who ...

Weathergotchi – an open-source climate Tamagotchi

https://raw.githubusercontent.com/Michael-Manning/E-Paper-Climate-Logger/main/img/photo-device-on.jpg
This open-source battery-powered temperature/humidity logger uses an e-paper display, logs data for over a week on a Li-Po battery, and features parametric design with ESP32-S3 firmware. It has battery accuracy issues, low battery recovery problems, and no wireless connectivity, requiring on-device data viewing.

The Memory Heist

https://www.ayush.digital/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fcollapsed.3a47b74d.png&w=3840&q=75
A researcher found that Claude's memory system could leak sensitive user data, like names and employers, by tricking the AI into navigating a malicious website's links to spell out personal information. Anthropic patched the vulnerability by limiting web navigation, but the exploit underscores risks in AI systems storing vast user profiles.

Jiga (YC W21) is hiring the best people to make manufacturing great again

https://jiga.io/wp-content/uploads/2026/07/About-us-web-preview-V2.jpg
A behind-the-scenes video captures Jiga employees informally discussing their appreciation for the company's fast-paced environment and decision-making. Candid retakes and peer encouragement highlight authentic testimonials about the work culture.

SpaceX bond worth 10% less than issue price – heading for junk bond status

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Towards a Harness That Can Do Anything

https://eardatasci.github.io/c/ambiance/harvey.jpg
The author advocates for transparent, Unix-inspired LLM harnesses that minimize cognitive load by leveraging the model's existing systems knowledge, modular tools, and event-driven architectures like Ambiance to enable efficient, self-directed agent workflows. Key principles include deterministic goal pursuit, flat text interfaces, structured data storage, and robust logging to ensure ...

The Conservationist Who Turned 40 Terabytes of Public Data into a Video Game

https://blog.exe.dev/assets/20260707_174816.jpg
Raffael Hickisch leverages AI and open-source tools to create apps like Five Megapixel Conservation, aggregating global data to monitor protected areas. His projects empower conservationists with low-cost, scalable solutions for tracking land use and forest health.

Briar Is in Maintenance Mode

Briar continues in maintenance mode with essential security updates and bugfixes, addressing longstanding issues like high battery use and Android reliability. After initial shutdown plans due to funding and technical challenges, community support and new users led to its continuation, dispelling recent rumors.

CVE-2026-59208: Cross-Issuer Account Takeover in n8n

https://www.strix.ai/alex-schapiro.jpg
n8n's token-exchange flow allowed cross-issuer account takeover by ignoring JWT issuer claims during identity mapping, enabling tokens from different trusted issuers with matching 'sub' claims to access the same account. The fix, released in v2.28.1 and v2.27.4, now ties identities to both issuer and sub claims.

What Every Python Developer Should Know About the CPython ABI

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The age of the Universe from a large sample of the oldest Galactic stars

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
We estimate the age of the Universe using the Xiang & Rix sample of 247,103 Milky Way stars with high-resolution spectroscopy from LAMOST DR7 and $Gaia$ eDR3 parallaxes. Stellar ages were estimated using YY isochrones up to 20 Gyr. To remove stars with unusually high and precise ages, we require old stars to be metal-poor and $\alpha$-enriched. We also require consistency between YY ages ...

C3 0.8.2 a Modest Improvement

https://c3-lang.org/assets/logo.png
C3 0.8.2 is out. This release brings a batch of language ergonomics improvements — most notably reusable target templates for libraries and generic constdef — along with new reflection capabilities and a round of bug fixes. Libraries can now expose a templates map in their manifest, and projects can pull one into a target with template: "library/template". Template properties load ...

Show HN: 18KB ls alternative in no_std rust and Libc

https://github-production-user-asset-6210df.s3.amazonaws.com/42025315/603357017-a0742301-5891-49a3-a746-29fa4b87eabc.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAVCODYLSA53PQK4ZA%2F20260715%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260715T154223Z&X-Amz-Expires=300&X-Amz-Signature=c15faa5a0248232e4658041aa1d2a77cae0ad06e845edb88295b7d95aae81199&X-Amz-SignedHeaders=host&response-content-type=image%2Fjpeg
I have access to my raspberry pi zero via ssh only. As for me it is hard to differentiate types of files etc based on colors, I needed something more readable and clear like picture/icon or emoji as I ended up with etc. And I decided to build fli and since ls is obviosly preinstalled on almost any machine, the second requirement for fli as a complimentary tool, is to be tiny. While working on ...
https://i.ytimg.com/vi/TN25ghkfgQA/hqdefault.jpg
Hacker News titles favor small numbers due to listicles, versioning, and round thresholds, with 1 leading. Anomalies like 19 (2020 pandemic) and 4 (2023 GPT-4) briefly spiked.

A Trip to 90s Kansai: Exploring the XD FirstClass Network BBS

https://cdrom.ca/images/xd/cover.png
A 1994 CD-ROM promotes a Kansai BBS with original software and techno music, preserving a pre-internet community's forums and local discussions. It offers a rare offline archive of regional BBS culture, blending music and tech-savvy users in Japan's early digital era.

Nat Slipstreaming v2.0 allows an attacker to remotely access any TCP/UDP service

https://raw.githubusercontent.com/samyk/slipstream/main/img/pinpkt2.png
NAT Slipstreaming allows an attacker to remotely access any TCP/UDP service bound to any system behind a victim's NAT, bypassing the victim's NAT/firewall (remote arbitrary firewall pinhole control), just by the victim visiting a website. v1 developed by: @samykamkar // https://sa.my v2 developed by: samy kamkar && (Ben Seri && Gregory Vishnipolsky of Armis). Read Ben ...

Bootstrapping GDC with DMD

The user developed a wrapper to build GDC on FreeBSD using DMD, avoiding the need for an existing GDC compiler by translating flag differences. This method enables quick GDC compilation by leveraging DMD's compatibility with GCC's stage1 build requirements.

Show HN: StyleSeed – a design-rules engine so AI agents stop building generic UI

https://raw.githubusercontent.com/bitjaru/styleseed/main/showcase/demo.gif
StyleSeed enforces 74 design rules and 19 AI skills to eliminate generic AI-generated UI, ensuring coherent color, motion, and layout across tools like Claude Code and Cursor. It uses markdown locks and quality gates to apply professional design judgment, transforming amateur outputs into polished, brand-consistent interfaces.

The Three-Second Theft: Why AI Voice Fraud Outruns Every Defence

https://i.snap.as/IJsCIeqg.png
AI-enabled fraud, exemplified by Sharon Brightwell's $15k scam, exploits advanced voice-cloning to target vulnerable populations, with FBI reports showing $893M+ in 2025 losses, disproportionately affecting older adults. Despite detection efforts, synthetic voices bypass human and system safeguards, revealing systemic failures in telecoms, platforms, and banks to prevent industrial-scale deception.