<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: josu</title><link>https://news.ycombinator.com/user?id=josu</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Sun, 07 Jun 2026 03:26:22 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=josu" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by josu in "CPanel's Black Week: 3 New Vulnerabilities Patched After Attack on 44k Servers"]]></title><description><![CDATA[
<p>So CPanel's security is just as bad as their UI, who would have thought?</p>
]]></description><pubDate>Sat, 09 May 2026 21:57:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=48078656</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=48078656</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48078656</guid></item><item><title><![CDATA[New comment by josu in "A recent experience with ChatGPT 5.5 Pro"]]></title><description><![CDATA[
<p>LLMs can also be really good in fields where you are not an expert. You just need to be very aware of your limitations, and start parallel conversation so one agent fact checks the other.</p>
]]></description><pubDate>Sat, 09 May 2026 15:23:18 +0000</pubDate><link>https://news.ycombinator.com/item?id=48075708</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=48075708</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48075708</guid></item><item><title><![CDATA[New comment by josu in "Gemini Robotics-ER 1.6"]]></title><description><![CDATA[
<p>Done! The whole planet is now veggies.</p>
]]></description><pubDate>Wed, 15 Apr 2026 17:05:53 +0000</pubDate><link>https://news.ycombinator.com/item?id=47781975</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=47781975</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47781975</guid></item><item><title><![CDATA[New comment by josu in "Spain to expand internet blocks to tennis, golf, movies broadcasting times"]]></title><description><![CDATA[
<p>>enact similarly stupid laws.<p>No new law was enacted. The ISPs are enforcing a court order.</p>
]]></description><pubDate>Tue, 14 Apr 2026 19:53:58 +0000</pubDate><link>https://news.ycombinator.com/item?id=47770621</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=47770621</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47770621</guid></item><item><title><![CDATA[New comment by josu in "Waymo seeking about $16B near $110B valuation"]]></title><description><![CDATA[
<p>>I wonder what will happen to the drivers if a large representation of the 1 million+ daily trips are displaced by automation?<p>If it happens gradually enough, they will just find other jobs. After the transition, society will be producing more with the same labor force, and thus the aggregate utility will increase.</p>
]]></description><pubDate>Mon, 02 Feb 2026 16:46:03 +0000</pubDate><link>https://news.ycombinator.com/item?id=46858100</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46858100</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46858100</guid></item><item><title><![CDATA[New comment by josu in "SoftBank in talks to invest up to $30B more in OpenAI"]]></title><description><![CDATA[
<p>> invested in (...) anything else practical.<p>I don't understand how this is the top comment. LLMs have unlocked a lot of value for me personally, and arguably for the society as a whole. They are also one of the coolest technologies I've tried in years. As a technologist, I'm really glad that money is pouring in and allowing us to find its limits.</p>
]]></description><pubDate>Wed, 28 Jan 2026 14:59:43 +0000</pubDate><link>https://news.ycombinator.com/item?id=46796185</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46796185</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46796185</guid></item><item><title><![CDATA[New comment by josu in "I vibecoded my way into the #1 position on the Highload.fun leaderboard"]]></title><description><![CDATA[
<p>How is it cheating? Do you also need to independently discover Bloom filters to be able to use them?</p>
]]></description><pubDate>Sun, 18 Jan 2026 21:44:35 +0000</pubDate><link>https://news.ycombinator.com/item?id=46672458</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46672458</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46672458</guid></item><item><title><![CDATA[I vibecoded my way into the #1 position on the Highload.fun leaderboard]]></title><description><![CDATA[
<p>Article URL: <a href="https://josusanmartin.com/blog/2026/01/18/the-game-has-changed-vibecoded-highload.html">https://josusanmartin.com/blog/2026/01/18/the-game-has-changed-vibecoded-highload.html</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=46672143">https://news.ycombinator.com/item?id=46672143</a></p>
<p>Points: 4</p>
<p># Comments: 2</p>
]]></description><pubDate>Sun, 18 Jan 2026 21:04:00 +0000</pubDate><link>https://josusanmartin.com/blog/2026/01/18/the-game-has-changed-vibecoded-highload.html</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46672143</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46672143</guid></item><item><title><![CDATA[New comment by josu in "Opus 4.5 is not the normal AI agent experience that I have had thus far"]]></title><description><![CDATA[
<p>I think you misunderstood, it's not about solving the problem, is about finding the most efficient solution. Give it a shot, and see if you can get to the top 10 on any task.</p>
]]></description><pubDate>Tue, 13 Jan 2026 22:12:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=46609027</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46609027</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46609027</guid></item><item><title><![CDATA[New comment by josu in "Opus 4.5 is not the normal AI agent experience that I have had thus far"]]></title><description><![CDATA[
<p>Thank you. Yeah, I'm doing all those things, which do get you close to the top. The rest of things I'm doing are mostly micro-optimizations such as finding a way to avoid AVX→SSE transition penalty  (1-2% improvement).<p>But I don't want to spoil the fun. The agents are really good at searching the web now, so posting the tricks here is basically breaking the challenge.<p>For example, chatGPT was able to find Matt's blog post regarding Task 1, and that's what gave me the largest jump: <a href="https://blog.mattstuchlik.com/2024/07/12/summing-integers-fast.html" rel="nofollow">https://blog.mattstuchlik.com/2024/07/12/summing-integers-fa...</a><p>Interestingly, it seems that Matt's post is not on the training data of any of the major LLMs.</p>
]]></description><pubDate>Fri, 09 Jan 2026 14:29:12 +0000</pubDate><link>https://news.ycombinator.com/item?id=46554211</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46554211</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46554211</guid></item><item><title><![CDATA[New comment by josu in "Opus 4.5 is not the normal AI agent experience that I have had thus far"]]></title><description><![CDATA[
<p>> The above is a software engineering problem. Reimplementing a JSON parser using Opus is not fun nor useful, so that should not be used as a metric.<p>I've also built a bitorrent implementation from the specs in rust where I'm keeping the binary under 1MB. It supports all active and accepted BEPs: <a href="https://www.bittorrent.org/beps/bep_0000.html" rel="nofollow">https://www.bittorrent.org/beps/bep_0000.html</a><p>Again, I literally don't know how to write a hello world in rust.<p>I also vibe coded a trading system that is connected to 6 trading venues. This was a fun weekend project but it ended up making +20k of pure arbitrage with just 10k of working capital.  I'm not sure this proves my point, because while I don't consider myself a programmer, I did use Python, a language that I'm somewhat familiar with.<p>So yeah, I get what you are saying, but I don't agree. I used highload as an example, because it is an objective way of showing that a combination of LLM/agents with some guidance (from someone with no prior experience in this type of high performing architecture) was able to beat all human software developers that have taken these challenges.</p>
]]></description><pubDate>Wed, 07 Jan 2026 19:15:54 +0000</pubDate><link>https://news.ycombinator.com/item?id=46531096</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46531096</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46531096</guid></item><item><title><![CDATA[New comment by josu in "Opus 4.5 is not the normal AI agent experience that I have had thus far"]]></title><description><![CDATA[
<p>You are looking at this wrong. Creating a json parser is trivial. The thing is that my one-shot attempt was 10x slower than my final solution.<p>Creating a parser for this challenge that is 10x more efficient than a simple approach does require deep understanding of what you are doing. It requires optimizing the hot loop (among other things) that 90-95% of software developers wouldn't know how to do. It requires deep understanding of the AVX2 architecture.<p>Here you can read more about these challenges: <a href="https://blog.mattstuchlik.com/2024/07/12/summing-integers-fast.html" rel="nofollow">https://blog.mattstuchlik.com/2024/07/12/summing-integers-fa...</a></p>
]]></description><pubDate>Wed, 07 Jan 2026 19:06:13 +0000</pubDate><link>https://news.ycombinator.com/item?id=46530965</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46530965</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46530965</guid></item><item><title><![CDATA[New comment by josu in "Opus 4.5 is not the normal AI agent experience that I have had thus far"]]></title><description><![CDATA[
<p>I know what's like running a business, and building complex systems. That's not the point.<p>I used highload as an example because it seems like an objective rebuttal to the claim that "but it can't tackle those complex problems by itself."<p>And regarding this:<p>"Claude is very useful but it's not yet anywhere near as good as a human software developer. Like an excitable puppy it needs to be kept on a short leash"<p>Again, a combination of LLM/agents with some guidance (from someone with no prior experience in this type of high performing architecture) was able to beat all human software developers that have taken these challenges.</p>
]]></description><pubDate>Wed, 07 Jan 2026 15:29:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=46527486</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46527486</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46527486</guid></item><item><title><![CDATA[New comment by josu in "Opus 4.5 is not the normal AI agent experience that I have had thus far"]]></title><description><![CDATA[
<p>Lol, the problem is not finding a solution, the problem is solving it in the most efficient way.<p>If you think you can beat an LLM, the leaderboard is right there.</p>
]]></description><pubDate>Wed, 07 Jan 2026 14:58:55 +0000</pubDate><link>https://news.ycombinator.com/item?id=46527093</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46527093</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46527093</guid></item><item><title><![CDATA[New comment by josu in "Opus 4.5 is not the normal AI agent experience that I have had thus far"]]></title><description><![CDATA[
<p>>So my verdict is that it's great for code analysis, and it's fantastic for injecting some book knowledge on complex topics into your programming, but it can't tackle those complex problems by itself.<p>I don't think you've seen the full potential. I'm currently #1 on 5 different very complex computer engineering problems, and I can't even write a "hello world" in rust or cpp. You no longer need to know how to write code, you just need to understand the task at a high level and nudge the agents in the right direction. The game has changed.<p>- <a href="https://highload.fun/tasks/3/leaderboard" rel="nofollow">https://highload.fun/tasks/3/leaderboard</a><p>- <a href="https://highload.fun/tasks/12/leaderboard" rel="nofollow">https://highload.fun/tasks/12/leaderboard</a><p>- <a href="https://highload.fun/tasks/15/leaderboard" rel="nofollow">https://highload.fun/tasks/15/leaderboard</a><p>- <a href="https://highload.fun/tasks/18/leaderboard" rel="nofollow">https://highload.fun/tasks/18/leaderboard</a><p>- <a href="https://highload.fun/tasks/24/leaderboard" rel="nofollow">https://highload.fun/tasks/24/leaderboard</a></p>
]]></description><pubDate>Wed, 07 Jan 2026 02:51:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=46521961</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46521961</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46521961</guid></item><item><title><![CDATA[New comment by josu in "Show HN: Vibe coding a bookshelf with Claude Code"]]></title><description><![CDATA[
<p>I was able to lead these two competitions using LLM agents, with no prior rust or c++ knowledge. They both have real world applications.<p>- <a href="https://highload.fun/tasks/15/leaderboard" rel="nofollow">https://highload.fun/tasks/15/leaderboard</a><p>- <a href="https://highload.fun/tasks/24/leaderboard" rel="nofollow">https://highload.fun/tasks/24/leaderboard</a><p>In both cases my score showed other players that there were better solutions and pushed them to improve their scores as well.</p>
]]></description><pubDate>Mon, 29 Dec 2025 16:40:53 +0000</pubDate><link>https://news.ycombinator.com/item?id=46422374</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=46422374</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46422374</guid></item><item><title><![CDATA[New comment by josu in "Tesla's ‘Robotaxis' Keep Crashing—Even With Human ‘Safety Monitors' Onboard"]]></title><description><![CDATA[
<p>This reads like a hit piece. Cars crash, that obvious. Are Robotaxis crashing above or below human-driver rates?</p>
]]></description><pubDate>Tue, 04 Nov 2025 15:04:20 +0000</pubDate><link>https://news.ycombinator.com/item?id=45811791</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=45811791</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45811791</guid></item><item><title><![CDATA[New comment by josu in "Making Every Windows 11 PC an AI PC"]]></title><description><![CDATA[
<p>I know what 99% of the people in HN are thinking while reading this post, and I agree, so I would like to hear the contrarian views:<p>Who is this useful for? What is the strategy behind this?</p>
]]></description><pubDate>Fri, 17 Oct 2025 21:18:35 +0000</pubDate><link>https://news.ycombinator.com/item?id=45622207</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=45622207</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45622207</guid></item><item><title><![CDATA[New comment by josu in "Who needs Git when you have 1M context windows?"]]></title><description><![CDATA[
<p>Read the article, the author is definitely in favor of using git.</p>
]]></description><pubDate>Tue, 07 Oct 2025 17:07:39 +0000</pubDate><link>https://news.ycombinator.com/item?id=45505791</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=45505791</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45505791</guid></item><item><title><![CDATA[New comment by josu in "Grocery prices have jumped up, and there's no relief in sight"]]></title><description><![CDATA[
<p>Simple is good.</p>
]]></description><pubDate>Tue, 23 Sep 2025 13:04:52 +0000</pubDate><link>https://news.ycombinator.com/item?id=45346474</link><dc:creator>josu</dc:creator><comments>https://news.ycombinator.com/item?id=45346474</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45346474</guid></item></channel></rss>