#obs (1 post)

[WFD 40] the butterfly garden

i rebuilt my entire website around a terminal aesthetic with procedural dot-matrix art, and turned the homepage into a guestbook where visitors become butterflies.

In the Atmosphere

The mascot of ATmosphereConf is a goose, accompanied by the motto we can just do things. I thought about this line often while I was in Vancouver for the event. Everyone was active: writing, managing communities, building side projects or businesses on Blu…

tar: a slop-free alternative to rsync

So apparently rsync is slop now. When I heard, I wanted to drop a quick note on my blog to give an alternative: tar. It doesn’t do everything that rsync does, in particular identifying and skipping up-to-date files, but tar + ssh can definitely accomodate …

Bucklog’s Machine: Inside a Kubernetes Scanning Fleet

Most scanning infrastructure is boring. A VPS, a cron job, maybe a cheap proxy rotation service if the operator has ambitions. What we’re looking at with AS211590 (Bucklog SARL / FBW Networks SAS) is something else entirely – a purpose-built, Kubernetes-or…

Upload a local demo to Codepen

Cryptography Engineering Has An Intrinsic Duty of Care

To understand my point, I need to first explain three different cryptography attack papers / blog posts. I promise this won’t be boring. Three Little Disclosures Misuse-Prone Ciphers For All In a blog post titled Carelessness versus craftsmanship in crypto…

Designing Odin's Casting Syntax

Odin;s declaration syntax becomes second nature to everyone who uses the language but I do sometimes get asked ;Why are there two ways to do type conversions?; Enough that I had to make an FAQ entry..The reason that there are two ways to do type conversio…

Status update, February 2026

Hi all! Lars has contributed an implementation independent test suite for the scfg configuration file format. This is quite nice for implementors, they get a base test suite for free. I’ve added support for it for libscfg, the C implementation. I’ve spent …

Investigating the SuperNote Notebook Format

I'm a big fan of eink tablets. I read a lot, I write a lot, I prefer handwritten notes, it's a match made in heaven. I've been using a Kindle Scribe for the past several years - I probably used it as much or more than my phone. Recently, I upgraded to a Su…

Luxe, ocaml et volupté

Luxe, ocaml et volupté by Clément Delafargue on February 16, 2026 Tagged as: ocaml. After a couple years using rust as my primary language, I’ve got a new job where I’m using a variety of languages (including rust and typescript), but mostly go 1. So…

How To Add DRM To Your Backend (easy) [2026 WORKING]

How KineMaster stopped some modded clients from accessing their asset market

Push comes to shove tools

Your tools are extensions of your skills

2025 in review

Come along with me as I review the past year. Heh, I often start these kinds of posts right at the start of the year, but it takes a few weeks longer than I ever expect to think them through.1 Two years of being independent After a second year of operati…

The Birthday Paradox, simulated

I'm a fan of simulating counterintuitive statistics. I recently did this with the Monty Hall problem and I really enjoyed how it turned out. A similarly interesting statistical puzzle is the birthday paradox: you only need to get 23 people in a room a room…

Merry Christmas, Ya Filthy Animals (2025)

It’s my last day of writing for the year, so I’m going to try keep this one quick – it was knocked out over three hours, so I hope you can forgive me if it’s a bit clumsier than my usual writing. For some strange reason, one of the few clear memories I hav…

Yep, Passkeys Still Have Problems

It's now late into 2025, and just over a year since I wrote my last post on Passkeys. The prevailing dialogue that I see from thought leaders is "addressing common misconceptions" around Passkeys, the implication being that "you just don't understand it co…

Hacking the World Poker Tour: Inside ClubWPT Gold’s Back Office

In June, 2025, Shubs Shah and I discovered a vulnerability in the online poker website ClubWPT Gold which would have allowed an attacker to fully access the core back office application that is used for all administrative site functionality.

Testing multiple versions of Python in parallel

Daniel Roy Greenfeld wrote about how to test your code for multiple versions of Python using `uv`. I follow up with a small improvement to the Makefile.