What is Hackers' Pub?

Hackers' Pub is a place for software engineers to share their knowledge and experience with each other. It's also an ActivityPub-enabled social network, so you can follow your favorite hackers in the fediverse and get their latest posts in your feed.

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Chris Heilmann @codepo8@toot.cafe
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WebMCP seems to be a very much needed tool for the web to stop agents scraping and guessing content and allowing maintainers to point them to where they need to go instead. developer.chrome.com/blog/webm
Tomorrow I am hosting two of the team on Coffee With Developers to learn more.

WebMCP is available for early preview  |  Blog  |  Chrome for Developers

WebMCP aims to provide a standard way for exposing structured tools, ensuring AI agents can perform actions on your side with increased speed, reliability, and precision.

developer.chrome.com · Chrome for Developers

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Patrick C Miller :donor: @patrickcmiller@infosec.exchange
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Shared by Maho 🦝🍻

Windows 11 Notepad flaw let files execute silently via Markdown links bleepingcomputer.com/news/micr

Windows 11 Notepad flaw let files execute silently via Markdown links

Microsoft has fixed a "remote code execution" vulnerability in Windows 11 Notepad that allowed attackers to execute local or remote programs by tricking users into clicking specially crafted Markdown links, without displaying any Windows security warnings.

www.bleepingcomputer.com · BleepingComputer

Link author: Lawrence Abrams@lawrenceabrams@infosec.exchange

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Hacker News 50 @hn50@social.lansky.name
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TikTok is tracking you, even if you don't use the app

Link: bbc.com/future/article/2026021
Discussion: news.ycombinator.com/item?id=4

An illustration showing a picture of a woman in folder with other private information and a web browser behind it (Credit: Serenity Strull/BBC)

TikTok is tracking you, even if you don't use the app. Here's how to stop it

TikTok is growing its data harvesting empire, and avoiding the app won’t protect you – but some easy steps can keep you safe.

www.bbc.com

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うえの :fedibird1: @utan@fedibird.com
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科学でニヒリズムを克服するのは不可能です。
事実命題からは当為命題は引き出せないのは、ヒュームが指摘済み(Is–ought problem)。

科学で陰謀論やトランプに立ち向かうのは不可能だと考えている。嘲笑されて終わりだろう。

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abadidea @0xabad1dea@infosec.exchange
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Shared by Maho 🦝🍻

So You Want To Write An Open Source Discord Replacement

Things you don’t need:
- federation/distributed systems
- multiparty end-to-end encryption
- an entirely new operating system kernel specially designed to—

Things you DO need:
- a user interface that is Normal
- the ability to use languages other than English and writing systems other than Latin
- higher standards of user experience than how irc actually works in the real world
- any fucking clue how Discord works and why people use it

I have muted replies to this post due to the usual reasons

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Chris is. @offby1@wandering.shop
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Shared by Glyph

The nominations opened today. For the third year in a row, I'm proud to be responsible for making the software that you'll use to nominate and vote, which is open source and free software.

It is built on and . I don't take donations for my work, but the foundations behind those libraries (and the others that NomNom depends on) certainly do!

Consider a donation to Django (djangoproject.com/fundraising/) or the PSF (python.org/psf/donations/) to support my work!

Django logo

Support Django

Support Django development by donating to the Django Software Foundation

www.djangoproject.com · Django Project

Link author: Django@django@fosstodon.org

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雨宮凪沙/nagiko @BananaGiko_cle@felesitas.cloud
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昔の芸術をつぶやくよ (@LfXAMDg4PE50i9e) on X
何という斬新な視点なのか。ダリの「Christ of Saint John of the Cross」 (1951)です。

空、というか宇宙空間に浮かぶキリスト。眼下には地上の光景が広がっています。その頭には棘の冠がなく、キリストを信仰の対象というより人間として表しているようにも感じます。もしかするとこの光景は→続 x.com/i/status/202173734651400

x.com · X (formerly Twitter)

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Anders Eknert @anderseknert@swecyb.com
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Shared by Gabriele Svelto

AI agent "contributes" PR to matplotlib.
PR gets rejected.
AI agent *writes and publishes blog to shame the maintainer*.

What a time to be alive.

github.com/matplotlib/matplotl

This PR addresses issue #31130 by replacing specific safe occurrences of np.column_stack with np.vstack().T for better performance. IMPORTANT: This is a more targeted fix than originally proposed. ...

[PERF] Replace np.column_stack with np.vstack().T by crabby-rathbun · Pull Request #31132 · matplotlib/matplotlib

This PR addresses issue #31130 by replacing specific safe occurrences of np.column_stack with np.vstack().T for better performance. IMPORTANT: This is a more targeted fix than originally proposed. ...

github.com · GitHub

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Playtester @playtesterhq@mastodon.social
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Explore a Tokyo suburb swallowed by the Membrane, a curse that warps reality into nightmares, as you follow your sister’s call and confront shadows and your own fear.

Play the demo: playtester.io/membrane

Membrane: Pixelated title card beside small girl under streetlight near building, surrounded by dark green misty shapes.

Membrane Demo on Playtester

I had lost all contact with my sister when she suddenly called me from a Tokyo suburb consumed by the Membrane — a curse that blurs the line between nightmares and reality. Fight shadows and your own fears in this psychological horror exploration game.

playtester.io · Playtester

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Patrick C Miller :donor: @patrickcmiller@infosec.exchange
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Windows 11 Notepad flaw let files execute silently via Markdown links bleepingcomputer.com/news/micr

Windows 11 Notepad flaw let files execute silently via Markdown links

Microsoft has fixed a "remote code execution" vulnerability in Windows 11 Notepad that allowed attackers to execute local or remote programs by tricking users into clicking specially crafted Markdown links, without displaying any Windows security warnings.

www.bleepingcomputer.com · BleepingComputer

Link author: Lawrence Abrams@lawrenceabrams@infosec.exchange

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Hacker News 50 @hn50@social.lansky.name
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Apache Arrow is 10 years old

Link: arrow.apache.org/blog/2026/02/
Discussion: news.ycombinator.com/item?id=4

Apache Arrow is 10 years old 🎉

The Apache Arrow project was officially established and had its first git commit on February 5th 2016, and we are therefore enthusiastic to announce its 10-year anniversary! Looking back over these 10 years, the project has developed in many unforeseen ways and we believe to have delivered on our objective of providing agnostic, efficient, durable standards for the exchange of columnar data. How it started From the start, Arrow has been a joint effort between practitioners of various horizons looking to build common grounds to efficiently exchange columnar data between different libraries and systems. In this blog post, Julien Le Dem recalls how some of the founders of the Apache Parquet project participated in the early days of the Arrow design phase. The idea of Arrow as an in-memory format was meant to address the other half of the interoperability problem, the natural complement to Parquet as a persistent storage format. Apache Arrow 0.1.0 The first Arrow release, numbered 0.1.0, was tagged on October 7th 2016. It already featured the main data types that are still the bread-and-butter of most Arrow datasets, as evidenced in this Flatbuffers declaration: /// ---------------------------------------------------------------------- /// Top-level Type value, enabling extensible type-specific metadata. We can /// add new logical types to Type without breaking backwards compatibility union Type { Null, Int, FloatingPoint, Binary, Utf8, Bool, Decimal, Date, Time, Timestamp, Interval, List, Struct_, Union } The release announcement made the bold claim that "the metadata and physical data representation should be fairly stable as we have spent time finalizing the details". Does that promise hold? The short answer is: yes, almost! But let us analyse that in a bit more detail: the Columnar format, for the most part, has only seen additions of new datatypes since 2016. One single breaking change occurred: Union types cannot have a top-level validity bitmap anymore. the IPC format has seen several minor evolutions of its framing and metadata format; these evolutions are encoded in the MetadataVersion field which ensures that new readers can read data produced by old writers. The single breaking change is related to the same Union validity change mentioned above. First cross-language integration tests Arrow 0.1.0 had two implementations: C++ and Java, with bindings of the former to Python. There were also no integration tests to speak of, that is, no automated assessment that the two implementations were in sync (what could go wrong?). Integration tests had to wait for November 2016 to be designed, and the first automated CI run probably occurred in December of the same year. Its results cannot be fetched anymore, so we can only assume the tests passed successfully. 🙂 From that moment, integration tests have grown to follow additions to the Arrow format, while ensuring that older data can still be read successfully. For example, the integration tests that are routinely checked against multiple implementations of Arrow have data files generated in 2019 by Arrow 0.14.1. No breaking changes... almost As mentioned above, at some point the Union type lost its top-level validity bitmap, breaking compatibility for the workloads that made use of this feature. This change was proposed back in June 2020 and enacted shortly thereafter. It elicited no controversy and doesn't seem to have caused any significant discontent among users, signaling that the feature was probably not widely used (if at all). Since then, there has been precisely zero breaking change in the Arrow Columnar and IPC formats. Apache Arrow 1.0.0 We have been extremely cautious with version numbering and waited until July 2020 before finally switching away from 0.x version numbers. This was signalling to the world that Arrow had reached its "adult phase" of making formal compatibility promises, and that the Arrow formats were ready for wide consumption amongst the data ecosystem. Apache Arrow, today Describing the breadth of the Arrow ecosystem today would take a full-fledged article of its own, or perhaps even multiple Wikipedia pages. Our "powered by" page can give a small taste. As for the Arrow project, we will merely refer you to our official documentation: The various specifications that cater to multiple aspects of sharing Arrow data, such as in-process zero-copy sharing between producers and consumers that know nothing about each other, or executing database queries that efficiently return their results in the Arrow format. The implementation status page that lists the implementations developed officially under the Apache Arrow umbrella (native software libraries for C, C++, C#, Go, Java, JavaScript, Julia, MATLAB, Python, R, Ruby, and Rust). But keep in mind that multiple third-party implementations exist in non-Apache projects, either open source or proprietary. However, that is only a small part of the landscape. The Arrow project hosts several official subprojects, such as ADBC and nanoarrow. A notable success story is Apache DataFusion, which began as an Arrow subproject and later graduated to become an independent top-level project in the Apache Software Foundation, reflecting the maturity and impact of the technology. Beyond these subprojects, many third-party efforts have adopted the Arrow formats for efficient interoperability. GeoArrow is an impressive example of how building on top of existing Arrow formats and implementations can enable groundbreaking efficiency improvements in a very non-trivial problem space. It should also be noted that Arrow, as an in-memory columnar format, is often used hand in hand with Parquet for persistent storage; as a matter of fact, most official Parquet implementations are nowadays being developed within Arrow repositories (C++, Rust, Go). Tomorrow The Apache Arrow community is primarily driven by consensus, and the project does not have a formal roadmap. We will continue to welcome everyone who wishes to participate constructively. While the specifications are stable, they still welcome additions to cater for new use cases, as they have done in the past. The Arrow implementations are actively maintained, gaining new features, bug fixes, and performance improvements. We encourage people to contribute to their implementation of choice, and to engage with us and the community. Now and going forward, a large amount of Arrow-related progress is happening in the broader ecosystem of third-party tools and libraries. It is no longer possible for us to keep track of all the work being done in those areas, but we are proud to see that they are building on the same stable foundations that have been laid 10 years ago.

arrow.apache.org · Apache Arrow

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Jeff Atwood @codinghorror@infosec.exchange
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Shared by Jeff Atwood

In the book Rural Versus Urban: The Growing Divide That Threatens Democracy (Sept 2025) Mettler and Brown argue that today’s U.S. political polarization is increasingly organized around place — a hardened rural-versus-urban identity divide — rather than simply "red states vs. blue states" or "coastal elites vs. flyover country." In their account, American sense of political conflict has come to feel like a fight between us and them based on where people live, and this rural - urban sorting now cuts across essentially every region and state.

Interesting! 🤔 Who could have possibly seen that coming? Maybe we could form a committee, have a lot of meetings, write a whitepaper or two, get some real solid podcasts going (everyone must know what Ezra Klein's opinion is on this), and get the think tanks to think even more hardererer?

Oh yeah! I almost forgot! We already started working on this nine months ago and we're underway in three rural counties already. My bad, y'all. rgmii.org

Rural Guaranteed Minimum Income Initiative • RGMII

Funds county-level studies providing direct cash support to rural communities facing generational poverty, while partnering with local organizations to generate evidence-based data and build lasting opportunity.

rgmii.org · Rural Guaranteed Minimum Income Initiative • RGMII

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Honič Péra 24 hodin @honicpera@snac.lab8.cz
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U uhynulých ptáků v pražské zoologické zahradě byla potvrzena ptačí chřipka. Informovala o tom Státní veterinární správa.
ℹ️ Kvůli výskytu nemoci omezí vstup návštěvníků do průchozích voliér a dočasně uzavře Rákosův pavilon a pavilon Sečuán, uvedl mluvčí.
🔵 Inspektoři zjistili výskyt nákazy poté, co zoo nahlásila postupný úhyn několika ptáků v některých expozicích.
🔗 https://czch.tv/WT6Zbv

V pražské zoo se potvrdila ptačí chřipka

U uhynulých ptáků v pražské zoologické zahradě byla potvrzena ptačí chřipka, informovala ve čtvrtek Státní veterinární správa. Inspektoři zjistili výskyt nákazy poté, co zoo nahlásila postupný úhyn několika ptáků v některých expozicích. Veterináři ve spolupráci se zoologickou zahradou přijmou mimořádná veterinární opatření s cílem zabránit šíření nákazy.

ct24.ceskatelevize.cz

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아덴² @A_den1126@mk.zvz.be
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Shared by nulta

오... 이제 브릿지 안되어있는 계정에서 온 답글에 상호작용하는 게 가능하다고 함
https://blog.anew.social/launch-interact-with-unbridged-replies-mentions/

Launch: Interact with Unbridged Replies & Mentions

Last year, we launched a feature for Bridgy Fed that sent a DM of an hourly digest of interactions that we couldn't bridge back to your native platform. While that gave you visibility into interactions you normally wouldn't have, you still had to have an account in the other ecosystem

blog.anew.social · A New Social

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Playtester @playtesterhq@mastodon.social
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Death Pong is an arcade-action demo where a tightening metal collar and a whispering crowd turn each volley into a high-voltage gamble with no draws, only winners or bodies.

Play the demo: playtester.io/death-pong

Death Pong: dripping red graffiti-style title over black background with splatter and rough brush strokes in frame.

Death Pong Demo on Playtester

You step into a place where no one plays for fun. A metal collar tightens around your neck, audience whispers, and every throw can end in victory… or voltage. Here, there are no draws — only winners or dead bodies.

playtester.io · Playtester

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