Alex Kuleshov

My turn about coding agents. In recent days, during my winter vacation, I have been playing with codex and claude agents. What can I say? It works... somehow. Probably the best way I have found to describe this "somehow" is: - Me: Pack my suitcase with my things. I need X, Y, Z - Agent: I took X, Y, Z and packed your suitcase - Me: Why did you break the handle while packing? Fix it - Agent: Do you want me to put the new handle on the side panel? - Me: No. Why? I want it in the original place, like it was before - Agent: I fixed the handle and unpacked the suitcase - ... In the end, I can clean up what I do not like, adjust things that I probably wasn't able to express in a clear way, and get it working. Does it produce the initial version faster than I would? Yes, much faster. Do I need to review it and adjust? Yes, a lot. Will it be faster to develop from scratch or to adjust everything I do not like? Hard to say. I'm very interested in learning how to use AI effectively. Lately there are so many takes like: "I knew nothing, not even a developer, but I wrote a next-generation OS in 11 minutes." And here I am, more or less a professional software developer, or at least I get used to think so, but all my experience so far boils down to what I described above. Any good advice on what to read, watch, apply?

@Adriksh #define true false will be funnier)

Remember the first rule of memory safety in C is to have fun

Great article! And, if you are interested in understanding the internals of CPython, I have written dozens of articles over the last few years: blog.codingconfessions.com/t/cpython-inte…

The Little Book of Semaphores by Allen B. Downey greenteapress.com/wp/semaphores/

Damn this blog is great Fitting a Query Engine in Three Cache Lines vertexclique.com/blog/fitting-a…

@ChShersh rfc-editor.org/rfc/rfc2549.ht…

Imagine everyone in the world has your app installed on their phone. How would you implement a system to deliver 8B+ notifications to everyone within 2 seconds?

Understanding the Go Runtime: The Scheduler - internals-for-interns.com/posts/go-runti…

This article is a real treat. Rust, data-oriented design, napkin math, and the debugging of a deep performance issue. The desire to learn Rust grows stronger every day. mnt.io/articles/about…

Why do CPUs have multiple cache levels? by Fabian Giesen. One of the best explanations, and my periodic recommendation to the students. fgiesen.wordpress.com/2016/08/07/why…

SRE deep dive into Linux Page Cache biriukov.dev/docs/page-cach…

@JohnKoepi no, since mostly review code at work

@0xAX do you already use vouch? github.com/mitchellh/vouch

Do you still review code of other people?

This is a monumental release: Concurrent Writes are finally here. When we started Turso more than a year ago, we asked a large number of people what is the thing that SQLite lacked but they wanted to see the most. The result was overwhelming: Concurrent Writes. It is not an easy feature to build: the whole database needs to be able to support MVCC (Multi-Version Concurrency Control). But it possible and doable because we have a full rewrite from a blank slate, and a great and reliable foundation of deterministic testing with both @AntithesisHQ and our own simulator. MVCC is now no longer experimental and will enter a short beta period (which we do for all features) before we call it GA. But that's not the only AMAZING thing in this release: SQLite is known to be a very permissive database. Types are suggestions. Turso now not only support STRICT tables, but comes with a type system including the ability to create your own types with the CREATE TYPE statement. Turso is SQLite reimagined for the age of AI. And it is hard to think of something more important and more overwhelmingly victorious than types. For the full changelog and goodies, see the post below!

Good overview of networking zero-copy with io_uring from Toke: blog.tohojo.dk/2026/02/the-in…

A practical performance improvement in Go 1.26!

This is the only article you'll need to learn about CPU architecture.

BitFields API: Type-Safe Bit Packing for Lock-Free Data Structures rocksdb.org/blog/2025/12/3…

Understanding the Go Compiler: The Linker internals-for-interns.com/posts/the-go-l…

An Introduction to Distributed Systems by Kyle Kingsbury!! github.com/aphyr/distsys-…

☁️ Cloudflare opensourced another Rust library > ecdysis: library that implements graceful process restarts where no live connections are dropped, and no new connections are refused blog.cloudflare.com/ecdysis-rust-g…

tired...