Arkiv

Postgres LISTEN/NOTIFY actually scales

Postgres LISTEN/NOTIFY has a bad reputation thanks in part to a popular blog post asserting it does not scale. If that were true, it would be a shame, because LISTEN/NOTIFY is a powerful tool, allowing you to use your Postgres database for low-latency durable notifications, streams, and pub/sub. The accusations aren’t wrong: NOTIFY has unintuitive […]

I got into YC by hacking it

tldr: I uncovered Y Combinator was scoring 100k+ founders around the world through Paxel, I broke it (possible easter egg) + found a vulnerability that let anyone forge and push any score to their ranking database, courtesy of an unvalidated hmac Latest update: YC admirably, didn’t mind. In just a couple hours after first-public-disclosure Jared […]

Claude Opus 5

Claude Opus 5 is available today. It’s a thoughtful and proactive model that comes close to the frontier intelligence of Claude Fable 5 at half the price. On coding and knowledge work evaluations like Frontier-Bench and GDPval-AA, Opus 5 is the new state-of-the-art, though it remains behind Mythos 5 on cybersecurity tasks. Opus 5 is […]

Claude Opus 5

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As of JDK 27, Oracle engineers will thus stop maintaining the macOS/x64 port

Owner Mikael Vidstedt Type Feature Scope Implementation Status Candidate Discussion hotspot dash dev at openjdk dot org Effort S Duration S Reviewed by Erik Joelsson Created 2026/06/05 22:47 Updated 2026/07/23 15:20 Issue 8386091 Summary Deprecate the macOS/x64 port, with the intent to remove it in a future release, in order to reduce maintenance costs. Motivation […]

Don’t Take the Black Pill [video]

Apple won’t let me show my app

Writing code is the #1 usage of LLMs right now. In the future that will likely change to automation (powering agents’ thinking as they work on tasks), but for today, the explosion of vibe coding has had a real effect on Apple. The App Store is seeing a deluge of vibe coded apps being submitted […]

Proving a Human Wrote Something

When drafting a new blog post after some years, it’s mandatory to begin it with some form of mea culpa. I actually made a New Year’s resolution to start writing more blog posts; after the dissolution of my company last year, my head was stuffed with all sorts of technical knowledge I needed to share […]

Be skeptical of OpenAI’s rogue hacker agent story

On 14 February 2019, OpenAI announced a language model called GPT-2, the precursor to the models that power modern AI chatbots and agents such as ChatGPT and Claude. But OpenAI declared GPT-2 was too risky to release, citing concerns about safety and abuse. I recall being annoyed at the time that OpenAI would make such […]

Unitree As2-W

Wherever It Goes, Conquers Every Terrain Combining the high-speed of wheels with the obstacle-overcoming capability of legs, it automatically adapts to stairs, gravel, and steep slopes. Traverses complex terrain with ease, climbing obstacles up to 80 cm high and slopes up to 45°.