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37•awaaz•1h ago•5 comments

Show HN: LocalGPT – A local-first AI assistant in Rust with persistent memory

https://github.com/localgpt-app/localgpt
204•yi_wang•7h ago•84 comments

Haskell for all: Beyond agentic coding

https://haskellforall.com/2026/02/beyond-agentic-coding
96•RebelPotato•7h ago•27 comments

Moroccan sardine prices to stabilise via new measures: officials

https://maghrebi.org/2026/01/27/moroccan-sardine-prices-to-stabilise-via-new-measures-officials/
16•mooreds•5d ago•0 comments

Roger Ebert Reviews "The Shawshank Redemption" (1999)

https://www.rogerebert.com/reviews/great-movie-the-shawshank-redemption-1994
21•monero-xmr•3h ago•21 comments

SectorC: A C Compiler in 512 bytes (2023)

https://xorvoid.com/sectorc.html
292•valyala•15h ago•56 comments

LLMs as the new high level language

https://federicopereiro.com/llm-high/
103•swah•4d ago•187 comments

Software factories and the agentic moment

https://factory.strongdm.ai/
226•mellosouls•18h ago•386 comments

Speed up responses with fast mode

https://code.claude.com/docs/en/fast-mode
182•surprisetalk•15h ago•184 comments

The Architecture of Open Source Applications (Volume 1) Berkeley DB

https://aosabook.org/en/v1/bdb.html
23•grep_it•5d ago•3 comments

LineageOS 23.2

https://lineageos.org/Changelog-31/
44•pentagrama•3h ago•9 comments

Hoot: Scheme on WebAssembly

https://www.spritely.institute/hoot/
192•AlexeyBrin•20h ago•36 comments

Stories from 25 Years of Software Development

https://susam.net/twenty-five-years-of-computing.html
195•vinhnx•18h ago•19 comments

Brookhaven Lab's RHIC concludes 25-year run with final collisions

https://www.hpcwire.com/off-the-wire/brookhaven-labs-rhic-concludes-25-year-run-with-final-collis...
79•gnufx•14h ago•62 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
357•jesperordrup•1d ago•104 comments

Substack confirms data breach affects users’ email addresses and phone numbers

https://techcrunch.com/2026/02/05/substack-confirms-data-breach-affecting-email-addresses-and-pho...
57•witnessme•4h ago•16 comments

uLauncher

https://github.com/jrpie/launcher
21•dtj1123•4d ago•5 comments

Wood Gas Vehicles: Firewood in the Fuel Tank (2010)

https://solar.lowtechmagazine.com/2010/01/wood-gas-vehicles-firewood-in-the-fuel-tank/
48•Rygian•3d ago•19 comments

First Proof

https://arxiv.org/abs/2602.05192
145•samasblack•17h ago•89 comments

Show HN: I saw this cool navigation reveal, so I made a simple HTML+CSS version

https://github.com/Momciloo/fun-with-clip-path
101•momciloo•15h ago•23 comments

Start all of your commands with a comma (2009)

https://rhodesmill.org/brandon/2009/commands-with-comma/
605•theblazehen•3d ago•218 comments

Al Lowe on model trains, funny deaths and working with Disney

https://spillhistorie.no/2026/02/06/interview-with-sierra-veteran-al-lowe/
113•thelok•17h ago•25 comments

The AI boom is causing shortages everywhere else

https://www.washingtonpost.com/technology/2026/02/07/ai-spending-economy-shortages/
337•1vuio0pswjnm7•21h ago•548 comments

The Scriptovision Super Micro Script video titler is almost a home computer

http://oldvcr.blogspot.com/2026/02/the-scriptovision-super-micro-script.html
11•todsacerdoti•7h ago•1 comments

Show HN: A luma dependent chroma compression algorithm (image compression)

https://www.bitsnbites.eu/a-spatial-domain-variable-block-size-luma-dependent-chroma-compression-...
43•mbitsnbites•3d ago•7 comments

OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
918•klaussilveira•1d ago•278 comments

Where did all the starships go?

https://www.datawrapper.de/blog/science-fiction-decline
173•speckx•4d ago•259 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
311•isitcontent•1d ago•39 comments

Selection rather than prediction

https://voratiq.com/blog/selection-rather-than-prediction/
40•languid-photic•4d ago•20 comments

FDA intends to take action against non-FDA-approved GLP-1 drugs

https://www.fda.gov/news-events/press-announcements/fda-intends-take-action-against-non-fda-appro...
123•randycupertino•10h ago•251 comments
Open in hackernews

Algebraic Semantics for Machine Knitting

https://uwplse.org/2025/03/31/Algebraic-Knitting.html
246•PaulHoule•9mo ago

Comments

ruined•9mo ago
the formalization of textile programming really brings computer science full-circle. as a neoluddite i approve
speerer•9mo ago
...as demonstrated by the analogy in the original post here, where he explains the concrete concept of knitting stitches by reference to the much more abstract concept of garbage collection in computer programming!
dwlg00•9mo ago
Braid groups are really interesting, and they also come up in fluid mixing: https://people.math.wisc.edu/~thiffeault/talks/gordon2022.pd...
tucnak•9mo ago
The slides are a blast, thanks

Classic mathematicians!

bregma•9mo ago
Back in the 1980s I was taking a foundational computer science course in which we derived Goedel's result using Cantor diagonalization. Excellent course. We were watching the TV version of Hitchhiker's Guide to the Galaxy at the time, too. One day I had the realization that since any recursively enumerable function could be interpreted as a computer program (given the right interpreter), that the sweater I was wearing was in fact possibly a computer program, and that all knitting (and some crocheting) was in fact just a manifestation of code in another language.

I then went on to realize any enumerable set could be similarly interpreted, including the entire countable population of Earth. And we already had the answer (42), but what was the question?

gwern•9mo ago
I suppose if nothing else, you could encode Wang tiles (https://en.wikipedia.org/wiki/Wang_tile) into knitting and then that's Turing-complete? Or would there be some better CA to encode?
internet_rand0•9mo ago
sorry, 42 is not gonna take us much farther

42 is a stand in for 41 and 43 which are some twin prime

for me to further elaborate on this crazy idea that haunts me (I must admit I also haunt these ideas) requires a twin prime theorem which we are still waiting for in 2025....

Y_Y•9mo ago
Does anyone know a good emulator for knitting machines? I'd love to play with these programs, but I'd like to get some practice before I start messing with real wool.
MikeTheGreat•9mo ago
Possibly off-topic, but if you're looking to reduce your costs you should look at acrylic yarn. There's also cotton yarn if you're looking for something less scratchy :)
camblomquist•9mo ago
Someone else mentioned the acrylic, I'm going to mention Scarlett Sparks' Open Source Knitting Machine if part of the fear is actually investing in the machine https://github.com/ScarlettSparks/KnittingMachine
kappasan•9mo ago
Speaking of computational knitting, I recently learned about "solid knitting" [1] which is awesome.

https://www.cs.cmu.edu/news/2024/solid-knitting

fc417fc802•9mo ago
That also links to an older piece about a software project for knitting machines that's really neat. I've been wondering for a while how difficult it would be to build a primitive one at home.

https://www.cs.cmu.edu/news/2018/software-automatically-gene...

nolamark•9mo ago
As for build a primitive one at home, (assuming one == machine controlled knitting machine) see the journey of Gerard Rubio from OpenKnit to Kniterate

https://www.labonthecheap.com/the-openknit-machine/ https://www.kniterate.com

nolamark•9mo ago
If out are willing to move the carriage back and forth manually, and transfer yarn manually (for increases and decreases, etc.), the route to go is buy an electronic Brother machine and replace the electronics. The old standard was the AYAB board that you constructed yourself. (the evilmadscientist.com version is no longer in production) https://www.ravelry.com/groups/ayab for help and to meet fellow travelers. (circuit board and components: https://www.etsy.com/shop/redpinkgreen)

The less DIY more professional looking way is the recently released eKnitter, which replaces the electronics, but in a manner that more closely resembles the original form factor of the machine. https://eknitter.com/produkt/eknitter/

nolamark•9mo ago
Okay, one last project to share. If you are more a start from zero sort of person, see this wonderful set of videos on designing a 3d printable manual knitting machine. Realistically, more of a wonderful educational process you should see, than an economically viable one. (Meaning you can buy used mass produced hardware for cheaper.)

https://www.youtube.com/watch?v=kUKiXIdw2pI&list=PLWDnfcUpk7...

fc417fc802•9mo ago
I'm really glad I scrolled back a ways. This is awesome (so are the others ofc).
WillAdams•9mo ago
Still kicking myself for not buying a "3D Knitted Chisel Roll" back when Lee Valley had them --- last I checked it might have been possible to import one from Europe, but having a hard time justifying that.....
t-trash•9mo ago
Reminds me of the work in the Carnegie Melon Textile Lab on the semantics and scheduling for knitting machine compilers (https://textiles-lab.github.io/publications/2023-knitout-sem...)
nolamark•9mo ago
"This work is in part a collaboration with folks currently and previously at CMU, including Jenny Lin, Tom Price, Jim McCann, and Hannah Fechtner."
statusfailed•9mo ago
I've been hoping for a nice concrete example of braided monoidal categories for ages, who knew that the best one was string diagrams that represent actual string! Great post!

@the author - I assume you're aware that morphisms in symmetric monoidal categories can be represented using cospans of hypergraphs - do you know if there's a similar combinatorial representation for braided monoidal categories?