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Show HN: Openleetcode – local LeetCode runner where tests live in the repo

https://github.com/therepanic/openleetcode
1•therepanic•1m ago•0 comments

SignFile – Sign anything. One flat price

https://signfile.io/
1•abdullah_eldoud•1m ago•0 comments

There is no free benchmark

https://www.pnas.org/doi/10.1073/pnas.2509757122
1•hhs•3m ago•0 comments

Show HN: A Kakeya Conjecture Game

https://quantisan.github.io/kakeya-game/
1•quantisan•4m ago•1 comments

Sperm Whales blow bubbles to achieve restful, vertical sleep

https://news.st-andrews.ac.uk/archive/sperm-whales-blow-bubbles-to-achieve-restful-vertical-sleep/
1•hhs•6m ago•0 comments

The 0,5 MB of nothing in all Apple Music files (2020)

https://www.ctrl.blog/entry/apple-music-nullbytes.html
2•downbad_•6m ago•0 comments

Insect submariners survive the depths without imploding

https://news.ubc.ca/2026/07/insect-submariners-survive-the-depths-without-imploding/
1•hhs•8m ago•0 comments

Show HN: Evidence Graph – type checking for the specs your AI agent implements

https://github.com/samchon/lint-plugin-evidence
1•autobe•10m ago•0 comments

Lawsuit Against Meta over Social Media Addiction Is Dropped

https://www.nytimes.com/2026/07/22/technology/meta-social-media-lawsuit.html
1•lxm•11m ago•0 comments

I don't have a dream job

https://harsehaj.substack.com/p/i-dont-have-a-dream-job
1•harsehaj•15m ago•0 comments

Glacier App

https://www.theglacierapp.com/
1•josephscott•15m ago•0 comments

The Knowledge Warehouse

https://productnow.ai/blogs/what-is-a-knowledge-warehouse
1•kadhirvelm•17m ago•0 comments

No mandatory registration. No identity verification. You control your data

https://everiot.org/
2•doener•18m ago•0 comments

Show HN: How well do you use Claude Code?

3•Paarthmj•18m ago•2 comments

Anthropic not giving up on the blue teams just yet

https://cephalosec.com/blog/anthropic-not-giving-up-on-the-blue-team-just-yet/
1•Versipelle•21m ago•0 comments

Ford Will Use Apple Maps in New Self-Driving System

https://www.nytimes.com/2026/07/23/business/ford-apple-software-self-driving.html
5•bookofjoe•28m ago•2 comments

Inside Ukraine's Kill Zone

https://www.reuters.com/graphics/UKRAINE-CRISIS/KILL-ZONE/znpnojmknvl/
3•bushwart•31m ago•0 comments

American literature, charted in one monumental map

https://bigthink.com/strange-maps/american-literature-charted-in-one-monumental-map/
1•sohkamyung•32m ago•0 comments

SpaceX Starship Flight 13 livestream [video]

https://www.spacex.com/launches/starship-flight-13
5•cryptoz•34m ago•2 comments

The challenges companies face to launch robotaxis in Europe

https://www.euronews.com/business/2026/07/24/the-challenges-companies-face-to-launch-robotaxis-in...
2•Markoff•35m ago•0 comments

GR: Ban LLM Contributions from Debian

https://lists.debian.org/debian-vote/2026/07/msg00000.html
3•thewebguyd•36m ago•0 comments

Implementing SEH in Rust and why you shouldn't do it

https://engineering.zeroitlab.com/2022/03/13/rust-seh/
2•not_a9•36m ago•0 comments

How to turn Claude Code transcripts into a shareable link

https://lore.link/blog/how-we-built-share
1•feifan•37m ago•0 comments

Fragmentation of sunfish caused by high-impact ramming behavior in orcas

https://www.frontiersin.org/journals/ethology/articles/10.3389/fetho.2026.1835536/full
2•mooreds•38m ago•0 comments

Feel The AGI: a collection of my Twitter bookmarks over the past year

https://feel-the-agi.exe.xyz/
1•voat•41m ago•0 comments

Untangler, Rectangle-style window management for GNOME

https://github.com/bluvulture/untangler
2•shonster88•43m ago•0 comments

Ask HN: What's Up with Archive.today?

3•nobody9999•43m ago•3 comments

Dolmenwood: Fantasy RPG built around the acclaimed Old-School Essentials rules

https://necroticgnome.com/collections/dolmenwood
2•doener•45m ago•0 comments

Benchmarking Qwen 3.6 35B MoE (3B active) on an RTX 3090

https://www.gilesthomas.com/2026/07/benchmarking-qwen-3-6-35b-moe-rtx-3090
2•gpjt•45m ago•0 comments

Rmatch: Fast Java native regex matcher for lots of expressions and data

https://github.com/la3lma/rmatch
2•rmzdotno•45m ago•0 comments
Open in hackernews

Show HN: Sanctum – An LLM-Guided Learning App

1•JTan2231•1y ago
https://apps.apple.com/us/app/athenaeum-sanctum/id6744429496

It's in an infant stage as I figure out exactly how I want this.

In a more marketing speech style,

---

I love learning things and soaking in information, but I constantly run into 3 ergonomic problems with doing so:

- Quality study materials are often so dense as to require an extended session of focus

- Ergonomic study materials require too much work to find + aren't always flexible to what I want to learn/study

- Social media feeds have rotted my UI tastes to prefer short-form, transient interfaces that build familiarity with repeated, intermittent exposure

So, I'm making a flashcard app to address these points. In short,

- Reference-based deck generation

  - LLMs are great, but human sources are always best.

  - Give it a PDF or web page, and it'll reference that resource in creating your deck

 - AI-powered grading

  - The vector math powering LLMs allows for much more loosely structured answer grading than just naive keyword matching.

  - Know the concept, but can't phrase it in the colloquial terms? Don't worry, phrase it as best you can and it can tell how well you get the idea.

 - Natural deck progression

  - If you've been performing well enough on a deck, take a quiz to see if you're ready to expand the flashcards in your study.
---

There are a few things I still am looking to iron out:

- I don't think flashcards are the optimal UI for learning

  - They're great for memorizing + I do think improving pattern-matching is essentially learning is, but I don't think flashcards are the most optimal vehicle for meaningful learning

  - i.e., Life is more than just trivia
- Personalization

  - Right now, you take a quiz to expand the deck along the same lines as the existing subject matter. I think this is okay at best and could very much be improved.

  - One of the ideas I had initially around this is that LLMs can be used to traverse the embedding space of accumulated knowledge in a way that subverts/transcends the traditional academic taxonomization of studies. 

  - i.e., I think UI is the bottleneck in soaking in more information/ideas. I think LLMs do well enough in pattern-matching requests to information that they could act as librarians for the internet--then, it's just a matter of scrunching down the information into more convenient interfaces (e.g., mobile).
- Sourcing, references, etc.--I prefer something human-made at the other end of the tunnel, but I'm not sure how long that will last.

- The name--far too esoteric

This is an active WIP--would love to hear what you all think.