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Collaborative Text Editing Without CRDTs or OT
Matthew Weidner | May 21st, 2025 Home | RSS Feed Keywords: text editing, server reconciliation, Articulated
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Software Engineering
The most popular blog posts about software engineering on Hacker News. 1,747 posts.
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Typst 0.13 is out now
With Typst 0.13, we wanted to improve the day-to-day experience of using Typst. We fixed some of the most long-standing bugs and made Typst even more flexible to...
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"Vibe code hell" has replaced "tutorial hell" in coding education
When I started thinking about the problems with coding education in 2019, "tutorial hell" was enemy number one. You'd know you were living in it if you:
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Exploring PostgreSQL 18's new UUIDv7 support
Exploring what's interesting about UUIDv7 support using a demo crab store.
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LLM function calls don't scale; code orchestration is simpler, more effective
TL;DR: Giving LLMs the full output of tool calls is costly and slow. Output schemas will enable us to get structured data, so we can let the LLM orchestrate ...
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Any program can be a GitHub Actions shell
In GitHub Actions, you can use the shell keyword to specify the shell that runs a given run: block. This keyword is optional for workflows but mandatory for action definitions.
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Git Diagramming "The Weave"
We all know the current US President is one hell of an orator and often assures us that he has “the best words”:
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Why Twilio Segment moved from microservices back to a monolith
Discover Twilio’s shift to a single powerful service! Learn cloud communication trends, customer success stories, and how to build scalable apps. Join now!
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The Anatomy of a macOS App
How Mac applications evolved from a multitude of resources to a bundle formed from a standard layout of directories, and how they have come to be largely self-contained in macOS 26.
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Haskell: A Great Procedural Language
These sound like dismissals or absurdities from the outside, but once you learn what they really mean, they take on a new light. In this article, I want to explain the third. (See the appendix if you are curious about the first two.)
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Is Gemini 2.5 good at bounding boxes?
Can Gemini 2.5 replace CNN for object detection?
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Why does Debian change software?
When I wrote Why is Debian the way it is? , a year and a half ago, I was asked to also cover why Debian changes the software it packages. Here's a brief list of examples of why that happens:
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Unity's Mono problem: C# code runs slower than it should
Execution of C# code in Unity's Mono runtime is slow by today's standards, much slower than you might expect! Our game runs 2-3x faster on modern .NET compared to Unity's Mono, and in a few small benchmarks I measured speedups of up to 15x. I've spent some time investigating what's going on and in this article I will…
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Building a Simple Search Engine That Works
You don't need Elasticsearch for most projects. I built a simple search engine from scratch that tokenizes everything, stores it in your existing database, and scores results by relevance. Dead simple to understand and maintain.
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I trusted an LLM, now I'm on day 4 of an afternoon project
A quick project spiraled into a marathon of AI missteps, hardware headaches, and hard-earned lessons. Welcome to the story of Deskthang.
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Why does target="_blank" have an underscore in front? (2024)
Ever wondered why you need the underscore in target="_blank" to open a link in a new tab?
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Five Years of Tinygrad
The first commit to tinygrad was October 17, 2020. It’s been almost three years since we raised money. The company is 6 people now. The codebase is 18,935 lines not including tests.
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I ported JustHTML from Python to JavaScript with Codex CLI and GPT-5.2 in hours
I wrote about JustHTML yesterday—Emil Stenström’s project to build a new standards compliant HTML5 parser in pure Python code using coding agents running against the comprehensive html5lib-tests testing library. Last …
530
Bun 1.2 Is Released
Built-in Postgres client with Bun.sql, built-in S3 object support with Bun.s3, a new text-based lockfile: bun.lock, Express is 3x faster, and a major update on Node.js compatibility.
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If all the world were a monorepo
The R ecosystem and the case for extreme empathy in software maintenance
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Homomorphically Encrypting CRDTs
Homomorphic encryption allows a computer to run programs on encrypted data. Learn how homomorphic encryption works through interactive examples, build a homomorphically encrypted CRDT and see whether it has promise for local-first software.
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My Own Private Binary: An Idiosyncratic Introduction to Linux Kernel Modules
Several years ago, I spent a serious chunk of time figuring out how to make really teensy ELF executable files. I started down this path because I was annoyed that all of my programs, no matter how short they were, never got smaller than 4k or so. I felt that was excessive, for C, and so I started looking at what ELF…
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Graphite is joining Cursor
Graphite has entered into a definitive agreement to be acquired by Cursor.
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Open-sourcing OpenPubkey SSH (OPKSSH): integrating single sign-on with SSH
OPKSSH (OpenPubkey SSH) is now open-sourced as part of the OpenPubkey project. This enables users and organizations to configure SSH to work with single sign-on technologies like OpenID Connect, removing the need to manually manage & configure SSH keys without adding a trusted party other than your IdP.
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SPy: An interpreter and compiler for a fast statically typed variant of Python
Antonio Cuni's blog
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What we learned copying all the best code assistants
From GitHub Copilot to ChatGPT to Claude Artifacts, how Val Town borrowed the best of all the code generation tools
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Revisiting "Let's Build a Compiler"
There's an old compiler-building tutorial that has become part of the field's lore: the Let's Build a Compiler series by Jack Crenshaw (published between 1988 and 1995).
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My Deus Ex lipsyncing fix mod
Back in 2021 I made a mod for Deus Ex 1 that fixes the lipsyncing and blinking, which, I betcha didn’t know, was broken since ship. Everything I wrote about it is on Twitter, and it oughta be somewhere else, so here’s a post about it. The mod itself can be downloaded here .
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Why We're Moving on from Nix
Meet Railpack — the next iteration of the Railway builder, developed from the ground up on lessons from building over 14 million apps with Nixpacks.