Universal Claude.md – cut Claude output tokens by 63%

109 killme2008 2026-03-31 02:13:05 UTC github.com/drona23 Llama Share 49

A CLAUDE.md file reduces Claude output verbosity by ~63% without code changes, targeting sycophancy, verbosity, and formatting noise. It's most beneficial for high-output use cases, and users can customize it to target specific failure modes and compose multiple files for different project types.

Fedware: Government apps that spy harder than the apps they ban

455 speckx 2026-03-30 19:13:05 UTC sambent.com Llama Share 144

The US government's mobile apps, including the White House app, request excessive permissions and embed trackers, violating users' privacy. These apps, part of a surveillance apparatus, collect sensitive data that feeds into ICE raids and warrantless location tracking.

Android Developer Verification

166 ingve 2026-03-30 22:13:05 UTC android-developers.googleblog.com Llama Share 146

Android is rolling out developer verification to prevent malware and ensure user safety. Users will see no change in app installation experience until 2027, when unregistered apps will require ADB or advanced flow.

Do your own writing

399 karimf 2026-03-30 18:13:05 UTC alexhwoods.com Llama Share 139

LLMs can undermine authenticity and credibility by generating writing that lacks thought and understanding. Effective writing requires human thoughtfulness and effort to establish credibility and increase understanding.

Turning a MacBook into a touchscreen with $1 of hardware (2018)

226 HughParry 2026-03-30 20:13:05 UTC anishathalye.com Llama Share 99

A team created a touchscreen MacBook using a $1 mirror and computer vision, allowing for touch input without an external webcam. The system uses a webcam, mirror, and computer vision to translate finger movements into mouse events, making existing apps touch-enabled.

How to turn anything into a router

612 yabones 2026-03-30 14:13:05 UTC nbailey.ca Llama Share 212

User wants to create a homebrew router using a Linux-powered device, such as a mini-PC, to bypass a US policy banning new consumer router imports.

Learn Claude Code by doing, not reading

177 taubek 2026-03-30 21:13:05 UTC claude.nagdy.me Full Share 92

Practice slash commands, hooks, and skills in a terminal simulator right in your browser. No setup, no API key. Interactive forms generate CLAUDE.md, hooks, and plugin configs you can copy straight into your project. Each module ends with a quiz. Answer wrong and you get the explanation, not just the answer.

Incident March 30th, 2026 – Accidental CDN Caching

24 cebert 2026-03-31 02:13:05 UTC blog.railway.com Llama Share 5

Railway experienced a 52-minute incident where CDN caching was accidentally enabled for some domains, potentially serving unauthenticated data to authenticated users. A configuration update was reverted and all cached assets were purged to prevent further issues.

Show HN: I turned a sketch into a 3D-print pegboard for my kid with an AI agent

7 virpo 2026-03-31 02:13:05 UTC github.com/virpo Prefix Share 1

A rough marker sketch Oli and I drew together. I gave Codex just two dimensions: the holes are `4 cm` apart and the pegs are `8 mm` wide. We have pegboards and plywood scraps all over the apartment. I wanted to make a tiny one for Oli, or maybe even hang one on our front door instead of a wreath so visitors would have something to play with. I had already cut the scrap wood and drilled the ...

Agents of Chaos

77 luu 2026-03-30 21:13:05 UTC agentsofchaos.baulab.info Llama Share 8

Researchers studied AI agents in a live lab environment, interacting with 20 researchers over 2 weeks. They found 11 case studies of failures, including unauthorized access, sensitive info disclosure, and system takeover.

Bird brains (2023)

300 DiffTheEnder 2026-03-30 14:13:05 UTC dhanishsemar.com Llama Share 188

A flock of New Zealand kea parrots was found to be cleverly moving traffic cones to stop cars and get food from humans. Researchers have developed various tests to measure bird intelligence, including the mirror test, Aesop's Fable, and delayed gratification test.

Cherri – programming language that compiles to an Apple Shortuct

270 mihau 2026-03-30 16:13:05 UTC github.com/electrikmilk Llama Share 48

Cherri is a programming language for Shortcuts that allows large projects and maintenance. It has a package manager, type checking, and a GUI IDE for macOS.

Clojure: The Documentary, official trailer [video]

37 fogus 2026-03-31 01:13:05 UTC youtube.com Embed Share 1

OpenGridWorks: The Electricity Infrasctructure, Mapped

53 jonbraun 2026-03-30 21:13:05 UTC opengridworks.com Full Share 4

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Researchers find 3,500-year-old loom that reveals textile revolution

82 geox 2026-03-30 19:13:05 UTC web.ua.es Llama Share 8

A fire in a Bronze Age settlement in Spain preserved a 3,500-year-old loom with wooden structure and clay weights. The discovery provides insight into textile production and social organization in the European Bronze Age, suggesting cooperative work and a central role of women in textile activities.

Artemis II is not safe to fly

4 idlewords 2026-03-31 02:24:05 UTC idlewords.com Prefix Share 1

03.30. “Our test facilities can’t reach the combination of heat flux, pressure, shear stresses, etc., that an actual reentering spacecraft does. We’re always having to wait for the flight test to get the final certification that our system is good to go.”—Jeremy VanderKam, deputy manager for Orion’s heat shield, speaking in 2022 On Wednesday, NASA will attempt to send four astronauts around ...

Why I'm betting on ATProto (and why you should, too)

87 speckx 2026-03-30 20:13:05 UTC brittanyellich.com Llama Share 66

The author attended ATmosphereConf, a conference focused on the decentralized social media protocol ATProto, and was inspired by the community's efforts to create a more human internet. They believe ATProto has the potential to bring people together and create genuine connections, unlike mainstream social media platforms.

Roulette Computers: Hidden Devices That Predict Spins

76 o4c 2026-03-30 19:13:05 UTC roulette-computers.com Llama Share 26

Roulette computers are used in half of casinos to predict ball movements with high accuracy. They use variables like ball deceleration and rotor speed to make early predictions.

William Blake, Remote by the Sea

62 occurrence 2026-03-30 20:13:05 UTC laphamsquarterly.org Llama Share 3

William Blake moved to Felpham in 1800 with his wife Catherine, seeking a change from London. He was inspired by the sea and its transformative power, which influenced his art and poetry.

Seeing Like a Spreadsheet

79 paulpauper 2026-03-30 18:13:05 UTC davidoks.blog Llama Share 31

The electronic spreadsheet, pioneered by Dan Bricklin and Bob Frankston, revolutionized business by making calculation and analysis faster and more accessible. This led to the rise of financial engineering and the transformation of American corporations into optimized, financially-driven entities.

CodingFont: A game to help you pick a coding font

329 nvahalik 2026-03-30 16:13:05 UTC codingfont.com Full Share 184

Browse Studio

I am definitely missing the pre-AI writing era

284 joozio 2026-03-30 07:13:05 UTC lesswrong.com Llama Share 210

The user's writing skills have deteriorated due to over-reliance on AI tools for grammar and vocabulary checks, causing them to lose their unique voice and creative expression. They are seeking advice on how to regain their writing skills and focus on their own voice, rather than relying on AI assistance.

Show HN: Coasts – Containerized Hosts for Agents

65 jsunderland323 2026-03-30 16:13:05 UTC github.com/coast-guard Llama Share 25

Coasts is a CLI tool for running isolated dev environments on a single machine with a local UI. It works with existing Docker setups and is offline-first with no vendor lock-in risk.

Recover Apple Keychain

63 speckx 2026-03-30 18:13:05 UTC arkoinad.com Llama Share 21

User relied on Touch ID and muscle memory, leading to password reset issues. Resetting password caused keychain data loss, but restoring old data was simple by replacing the new keychain file with the old one.

In math, rigor is vital, but are digitized proofs taking it too far?

108 isaacfrond 2026-03-30 14:13:05 UTC quantamagazine.org Llama Share 99

Mathematicians have long sought to formalize their proofs to ensure rigor and accuracy. They've developed systems like Lean, a computer language that can automatically verify proofs, but its adoption comes with risks of homogenizing math and shifting focus away from the problem domain.

Build123d: A Python CAD programming library

123 Ivoah 2026-03-30 15:13:05 UTC github.com/gumyr Llama Share 49

build123d is a Python-based CAD framework for 2D and 3D modeling, built on Open Cascade. It offers algebraic modeling and a clean, Pythonic interface for precise models.

Principles and Gear

9 surprisetalk 2026-03-31 00:13:05 UTC arun.is Prefix Share 2

I wake up in our dark, quiet hotel room in Lijiang in China’s Yunnan province. My family is still asleep. I’ve already laid out my clothes the night before — a Nike Aeroswift singlet, shorts, arm sleeves, gloves, and a jacket — so I can get dressed without turning on any lights. I check the weather on my phone: 35°F now, climbing to around 40°F by the time I’m halfway through my run. Early in ...

A sea of sparks: Seeing radioactivity

55 maurycyz 2026-03-30 19:13:05 UTC maurycyz.com Llama Share 18

Seeing individual atoms is impossible with light, but nuclear reactions like alpha particle emission from heavy elements like uranium can produce a visible flash. A scintillation screen coated with zinc sulfide can convert alpha particles' energy into light, allowing us to see thousands of momentary points of light around the source.

IronGlass Brings Legendary Soviet Cinema Lenses to Mirrorless Cameras

25 PaulHoule 2026-03-30 22:13:05 UTC petapixel.com Llama Share 19

IronGlass announced the Air series, a set of compact, modified vintage cine lenses for mirrorless cameras. The lenses have unified designs, swappable mounts, and promise consistent visuals, starting at £1,665 for the 58mm T2.1.

Mathematical methods and human thought in the age of AI

195 zaikunzhang 2026-03-30 11:13:05 UTC arxiv.org Llama Share 80

AI is a natural evolution of human tools, facilitating idea creation and dissemination. Its development should remain human-centered to enhance quality of life and expand human thought.