<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: mpoteat</title><link>https://news.ycombinator.com/user?id=mpoteat</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Fri, 17 Apr 2026 05:59:55 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=mpoteat" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by mpoteat in "Show HN: Unicode Steganography"]]></title><description><![CDATA[
<p>You can actually do better: hint - variational selectors, low bytes.</p>
]]></description><pubDate>Tue, 07 Apr 2026 22:59:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=47682422</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=47682422</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47682422</guid></item><item><title><![CDATA[New comment by mpoteat in "We want strict narrowly typed JSX"]]></title><description><![CDATA[
<p>I also have a corresponding blog post here, where I use this capability to embed custom JSX types as an alternative way to express 'concatenative' higher-kinded pipelines: <a href="https://code.lol/post/programming/jsx-hkt/" rel="nofollow">https://code.lol/post/programming/jsx-hkt/</a><p>I just think it's neat</p>
]]></description><pubDate>Wed, 28 Jan 2026 22:43:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=46802713</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=46802713</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46802713</guid></item><item><title><![CDATA[We want strict narrowly typed JSX]]></title><description><![CDATA[
<p>Article URL: <a href="https://github.com/poteat/jsx-backend/tree/main/packages/strict-jsx">https://github.com/poteat/jsx-backend/tree/main/packages/strict-jsx</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=46802691">https://news.ycombinator.com/item?id=46802691</a></p>
<p>Points: 5</p>
<p># Comments: 2</p>
]]></description><pubDate>Wed, 28 Jan 2026 22:42:09 +0000</pubDate><link>https://github.com/poteat/jsx-backend/tree/main/packages/strict-jsx</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=46802691</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46802691</guid></item><item><title><![CDATA[New comment by mpoteat in "I caught Google Gemini using my data and then covering it up"]]></title><description><![CDATA[
<p>I've had similar issues with conversation memory in ChatGPT, whereby it will reference data in long-deleted conversations, independent of my settings or my having explicitly deleted stored memories.<p>The only fix has been to completely turn memory off and have it be given zero prior context - which is best, I don't want random prior unrelated conversations "polluting" future ones.<p>I don't understand the engineering rationale either, aside from the ethos of "move fast and break people"</p>
]]></description><pubDate>Tue, 18 Nov 2025 04:05:06 +0000</pubDate><link>https://news.ycombinator.com/item?id=45961258</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45961258</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45961258</guid></item><item><title><![CDATA[New comment by mpoteat in "I caught Google Gemini using my data and then covering it up"]]></title><description><![CDATA[
<p>This is a LLM directly, purposefully lying, i.e. telling a user something it knows not to be true. This seems like a cut-and-dry Trust & Safety violation to me.<p>It seems the LLM is given conflicting instructions:<p>1. Don't reference memory without explicit instructions<p>2. (but) such memory is inexplicably included in the context, so it will inevitably inform the generation<p>3. Also, don't divulge the existence of user-context memory<p>If a LLM is given conflicting instructions, I don't apprehend that its behavior will be trustworthy or safe. Much has been written on this.</p>
]]></description><pubDate>Tue, 18 Nov 2025 02:12:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=45960635</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45960635</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45960635</guid></item><item><title><![CDATA[New comment by mpoteat in "Dependent types and how to get rid of them"]]></title><description><![CDATA[
<p>Actually, it's even simpler: you should just be able to use signature overloading:<p><pre><code>  myFunc(x: true): number
  myFunc(x: false): string
</code></pre>
The article's assertion that TypeScript can't represent this is quite false.</p>
]]></description><pubDate>Tue, 11 Nov 2025 08:25:44 +0000</pubDate><link>https://news.ycombinator.com/item?id=45885230</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45885230</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45885230</guid></item><item><title><![CDATA[New comment by mpoteat in "When 'perfect' code fails"]]></title><description><![CDATA[
<p>> I also avoid technologies where the code I write is different from the code being executed.<p>Not to be snarky, but as opposed to writing assembly? Where do you draw the line if you don't allow TypeScript (which is, with limited exceptions, only type erasure unless you specifically request polyfill), but allow other forms of compilation? Would you define JVM bytecode or IR as messy-looking junk code?<p>It's hard to see how a principled line could be drawn here.</p>
]]></description><pubDate>Tue, 28 Oct 2025 01:22:17 +0000</pubDate><link>https://news.ycombinator.com/item?id=45728318</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45728318</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45728318</guid></item><item><title><![CDATA[New comment by mpoteat in "Many Factorials in Lambda Calculus"]]></title><description><![CDATA[
<p>@marvinborner<p>Is there any hope for a "hashlife" style cache for a TC language? My understanding is that hashlife exploits spatial locality / "causation speed" in GoL, which isn't available in LC because of beta reduction. Thoughts?</p>
]]></description><pubDate>Sat, 25 Oct 2025 00:23:06 +0000</pubDate><link>https://news.ycombinator.com/item?id=45700416</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45700416</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45700416</guid></item><item><title><![CDATA[New comment by mpoteat in "Many Factorials in Lambda Calculus"]]></title><description><![CDATA[
<p>I like to refer to code that has been overly injected with syntactic sugar as "caramelized". We need more culinary metaphors for programming jargon!</p>
]]></description><pubDate>Sat, 25 Oct 2025 00:14:07 +0000</pubDate><link>https://news.ycombinator.com/item?id=45700370</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45700370</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45700370</guid></item><item><title><![CDATA[New comment by mpoteat in "Unicode variation selectors for invisible LLM injection"]]></title><description><![CDATA[
<p>Recently, LeetCode has begun hiding instructions (using css) in their competitions to use particular unique variable names like 'dexolarniv' - and anyone using such a variable name in their submission gets summarily banned.<p>In their implementation, the hidden prompt does show up on copy/paste - however I tested this method, and the LLM (i.e. ChatGPT) does still follow the Unicode-hidden instruction and uses 'dexolarniv' in the code returned! So I think this is (right now) a viable invisible injection strategy.</p>
]]></description><pubDate>Mon, 08 Sep 2025 16:48:24 +0000</pubDate><link>https://news.ycombinator.com/item?id=45170572</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45170572</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45170572</guid></item><item><title><![CDATA[Unicode variation selectors for invisible LLM injection]]></title><description><![CDATA[
<p>Article URL: <a href="https://code.lol/post/programming/llm-injection/">https://code.lol/post/programming/llm-injection/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=45170571">https://news.ycombinator.com/item?id=45170571</a></p>
<p>Points: 3</p>
<p># Comments: 1</p>
]]></description><pubDate>Mon, 08 Sep 2025 16:48:24 +0000</pubDate><link>https://code.lol/post/programming/llm-injection/</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=45170571</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45170571</guid></item><item><title><![CDATA[New comment by mpoteat in "Type-machine"]]></title><description><![CDATA[
<p>Look at what they need to mimic a fraction of our power.</p>
]]></description><pubDate>Wed, 20 Aug 2025 07:18:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=44959487</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=44959487</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44959487</guid></item><item><title><![CDATA[New comment by mpoteat in "A parser for TypeScript types, written in TypeScript types"]]></title><description><![CDATA[
<p>If folks are interested in this sort of thing, but want to play around with higher order building blocks, <a href="http://hkt.code.lol" rel="nofollow">http://hkt.code.lol</a> may be worth checking out.<p>In addition to type-level analogues of your normal Lodash-esque functions, it includes a suite of type-level parser combinator utilities and is built on higher-kinded type abstractions.</p>
]]></description><pubDate>Mon, 04 Aug 2025 07:20:47 +0000</pubDate><link>https://news.ycombinator.com/item?id=44782901</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=44782901</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44782901</guid></item><item><title><![CDATA[New comment by mpoteat in "A parser for TypeScript types, written in TypeScript types"]]></title><description><![CDATA[
<p>I took a look at the source for the attached repository - the parser is in fact clearly written as a generic type. The presence of ?, :, and ... operators represent conditional types and tuple level destructuring respectively.<p>This is a very impressive project in my view - it's baffling that you would have the wherewithal to link the discussion you did but not realize the novelty here.</p>
]]></description><pubDate>Mon, 04 Aug 2025 07:02:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=44782821</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=44782821</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44782821</guid></item><item><title><![CDATA[New comment by mpoteat in "Tabletop particle blaster: Tiny nozzles, lasers could replace giant accelerators"]]></title><description><![CDATA[
<p>High energy protonic rifle? We already have extraordinarily high energy lasers in a handheld format.<p>If a stream of bosons can do that much damage, I wonder what a stream of hadrons can do!</p>
]]></description><pubDate>Mon, 02 Jun 2025 17:42:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=44161255</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=44161255</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44161255</guid></item><item><title><![CDATA[New comment by mpoteat in "For algorithms, a little memory outweighs a lot of time"]]></title><description><![CDATA[
<p>More fundamentally O(n^(1/2)) due to the holographic principle which states that the maximal amount of information encodable in a given region of space scales wrt its surface area, rather than its volume.<p>(Even more aside to your practical heat dissipation constraint)</p>
]]></description><pubDate>Thu, 22 May 2025 00:23:01 +0000</pubDate><link>https://news.ycombinator.com/item?id=44057558</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=44057558</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44057558</guid></item><item><title><![CDATA[New comment by mpoteat in "Columbia student suspended over interview cheating tool raises $5.3M"]]></title><description><![CDATA[
<p>Columbia has it right. In a just world, this behavior would be derided and considered anathema. This is moral bankruptcy plain and simple and ought to be considered a violation of CFAA.<p>Even if you are against modern interviewing practices, you should be more against deceiving your prospective coworkers. This is borderline sociopathic.</p>
]]></description><pubDate>Tue, 22 Apr 2025 07:45:20 +0000</pubDate><link>https://news.ycombinator.com/item?id=43759945</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=43759945</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43759945</guid></item><item><title><![CDATA[New comment by mpoteat in "The Great AI Weirding"]]></title><description><![CDATA[
<p>On reflection I agree.<p>Still, I feel the author should have explicitly acknowledged the fact that there are underprivileged kids out there that would kill for the opportunities he was given.</p>
]]></description><pubDate>Sat, 30 Dec 2023 22:59:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=38820131</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=38820131</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=38820131</guid></item><item><title><![CDATA[New comment by mpoteat in "Tracking developer build times to decide if the M3 MacBook is worth upgrading"]]></title><description><![CDATA[
<p>A standard CS program will cover statistics (incl. calculus-based stats e.g. MLEs), and graphics is a very common and popular elective (e.g. covering OpenGL). I learned all of this stuff (sans shaders) in undergrad, and I went to a shitty state college. So from my perspective an entry level programmer should at least have a passing familiarity with these topics.<p>Does your experience truly say that the average SWE is so ignorant? If so, why do you think that is?</p>
]]></description><pubDate>Sat, 30 Dec 2023 22:55:52 +0000</pubDate><link>https://news.ycombinator.com/item?id=38820099</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=38820099</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=38820099</guid></item><item><title><![CDATA[New comment by mpoteat in "The Great AI Weirding"]]></title><description><![CDATA[
<p>The key, from my perspective, is to focus on real work which produces real value for other human beings. In an academic context I admit that it can be difficult to attach this value to your work.<p>As well, in this article, a person bemoans the opportunities their parents gave them; piano lessons, math competitions, etc. Even though they have clearly benefited from these advantages, it's unclear to me if the person acknowledges the position of privilege that such an upbringing grants.</p>
]]></description><pubDate>Fri, 22 Dec 2023 01:58:16 +0000</pubDate><link>https://news.ycombinator.com/item?id=38729999</link><dc:creator>mpoteat</dc:creator><comments>https://news.ycombinator.com/item?id=38729999</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=38729999</guid></item></channel></rss>