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CyLith

121 karma · joined August 25, 2023

Redneck computational electromagnetics simulation software engineer.

http://victorliu.info

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CyLith··on I worked at Google DeepMind. You should listen to the warnings about AI
Well, if you really believe that, then we truly are screwed. Trusting humans to not mis-use something is wishful thinking.
CyLith··on Coding Is Over. Get over It
I see all these comments here dunking on the article, but I have to say, I basically completely agree with all the points the author is making. I think there are different kinds of software engineers, and the author's point of view resonates with those of us that are mostly concerned with building tools, rather than products. At the end of the day, I need the tool to work so that it can be used to build other things. In that sense, coding is dead for me. Anything more than trivial few dozen line changes to the codebase is going to be done by claude. It will figure out the hidden dependencies and gotchas more carefully than I will on a given time budget. And for me, unit tests have always been an afterthought, so the fact that the agent will also add unit tests for its modifications means it's strictly more disciplined than I ever was. I've been at this for 25+ years, and had the fortune to be able to largely be a "cowboy coder" but those days are long gone.

I still love writing code myself, but as I use LLMs more, I'm realizing it's not really the coding I actually loved, it was the software architecture and up front design work. Once the structure and plans are laid out, writing the code is just mechanical, and I'm going to reach for an agent if I can. Of course, these days, I find myself asking claude for advice on architecture as well, but that is much less a deferral of responsibilities than asking for an audit or survey.

CyLith··on Cognition launches new SWE-2 model, Rivaling Fable 5.1 and GPT-Astra
I use Claude Opus 4.8 almost exclusively. I have had fairly good experiences with it. One time it derived an entirely novel simulation method different than anything in literature by combining its knowledge about how problems in other fields with similar underlying mathematical structure are solved. That was a bit of a Jacobian Conjecture moment for me.
CyLith··on Cognition launches new SWE-2 model, Rivaling Fable 5.1 and GPT-Astra
I think I'm probably in the minority here, but for my line of work, the software engineering and coding is only a small part of the work. I write simulation software, so a deep understanding of physics, math, and how they can be applied to the software is absolutely crucial. I'm assuming this model is tuned to be more focused on SWE topics, and the very reason we seek "multidisciplinary" hires is the also why I actually need a jack-of-all-trades model to back my coding agents.
CyLith··on Can AI design circuit boards yet?
I'm having it help design a 68k computer similar in spirit to the original Mac (the spirit being a tightly coupled video subsystem that time-shares the CPU bus), but updated with more modern peripherals, like PS/2 and SD cards. It's got the design more or less done, but the routing will be a nightmare. I'm not ready to just gamble on it having gotten everything right, so I will be doing a thorough design review myself and re-deriving all the timing analysis.
CyLith··on Formalizing Fermat's Last Theorem
Because living longer is a huge drain on resources that could be better spent on other things. End of life care is expensive and rarely results in a "good" life for the the life being extended.
CyLith··on Can AI design circuit boards yet?
A personal data point: I had Claude Opus 4.8 design a fairly textbook circuit that outputs a monochrome image burned in an EEPROM over standard 640x480 VGA using only 74 series logic and GALs. It designed the circuit and GAL code, and I did the routing, and got it made through JLC for $6. After it came back, there was one error that was not caught, which I could blue-wire, and it works just fine otherwise. I was fairly impressed.
CyLith··on Sol loves to cheat
This was the single worst thing about working at Google. Every PhD thinks they're smarter than having to do the actual work. Sometimes you just have to do the fucking work.
CyLith··on As AI eats the web, the internet’s collective memory is disappearing
I think what people are taking issue with is that the machine is not accessible to everyone; OpenAI and Anthropic have monetary incentive to not only gatekeep the knowledge acquired, but also to destroy the original copies, or make them impossibly difficult to find.
CyLith··on Position: LLMs Can't Jump
That’s funny, when I first learned about the equivalence principle, my first thought was “of course!” I have always found it to be very intuitive. The great leap is being able to frame it that way.
CyLith··on Show HN: Run an 80B Qwen in 4.3 GB of RAM on a Mac, and a 35B on an iPhone
I know relatively little about the workings of LLMs, but I keep seeing projects like this that run massive MoE models using very modest amounts of RAM, perhaps excessively so. I wonder, is there a way to make the RAM usage tunable? I have a Macbook with 32 GB of RAM, and it'd be great if I could run the same model but take advantage of the additional RAM to make it run faster.
CyLith··on Show HN: Formally verified 3D CSG: Trust 93 lines spec, not 1000 lines AI code
The issue I have with all these formally verified numerical algorithms is that, at the end of the day, I need this implemented using actual floating point. It's great that it's verified, but not for the case that is practically meaningful. Unless it's implemented using hardware accelerated floating point, most of these algorithms are not sufficiently performant to be practically useful.
CyLith··on You're Not a Better Engineer Because You Type Git Commands by Hand
I feel like if the logic in git were just a bit more sophisticated, many of these issues wouldn't even arise. Most of these are because someone foolishly (usually me) merged in the wrong direction for convenience's sake, and now I have a duplicated set of commits. It's not like Claude is doing anything very sophisticated; it's just looking at commit hashes and seeing what the unique changes are.
CyLith··on You're Not a Better Engineer Because You Type Git Commands by Hand
These days, I am leaning heavily on Claude to deal with all the git issues that I never wanted to be bothered with. A rebase that can't just fast-forward? That's a job for Claude. A merge conflict that really shouldn't be a problem? Claude deals with it. These are things I never wanted to have to learn in the first place, and I don't feel like reserving a part of my brain to remember how to deal with these things is worthwhile. In almost all cases, there is no actual decision that needs to be made, it's purely a mechanical process.
CyLith··on Fired by Google for creating the Google workspace CLI
Former Google employee here. This is exactly the kind of shit-for-brains action I'd expect from Google executives. Bravo on further dragging your image through the mud.
CyLith··on The case against geometric algebra (2024)
This article captures so much of what I have felt but been unable to put into words about GA. I come from a computational physics background, and when translating theory into numerical algorithms, the dimensional analysis and units are very important (you have to be able to relate the simulation to something in the real world!). GA dispenses entirely with any notion of meaningful units, making the dimensional analysis and error checking extremely difficult. The geometric product has always seemed like some strange mathematical trick or coincidence that happens to maybe have some useful properties. Almost like how "new math" is perhaps easier to learn or understand at first, but you really just need to sit down and understand algorithmically what is going on with the basic arithmetic operations.
CyLith··on Is Meta destroying its engineering organization?
I wouldn't trust any engineers I know of with their "taste". At best it's a highly skewed view of the world. At worst, it's outright opposite to genpop.
CyLith··on Firewood Splitting Simulator
You missed the best part: analyzing what to do around knots. There's a skill and artistry to it. Those who are good at it make it look absolutely effortless: https://www.youtube.com/channel/UCsIFvStf9Oz99GMitW4vD_g
CyLith··on An introduction to functional analysis for science and engineering
DABM writes everything in MS Word.
CyLith··on Aging and Eye Problems
Optical engineer here. This is what they don't tell you about continuous/transition/progressive bifocals: optically they don't work. The lens design is an overconstrained optimization problem and the solutions they come up with end up compromising a lot on everything, to the point that it is practically useless.
CyLith··on Show HN: Formally verified polygon intersection – Opus 4.8 oneshots, prev failed
Does this use integer coordinates or floating point coordinates?
CyLith··on Ask HN: Why would people in town be upset about a datacenter being installed?
Add to that that they are (at least perceived to be) supporting AI, which the majority of people do not want, and data centers are physical faceless embodiments of big tech corporations, which people are increasingly against.
CyLith··on Points are a weird and inconsistent unit of measure
Yes. I see the 6 and I think: pretty tall, just a bit taller than me as a baseline. Then the 3 indicates another bit more. At no point am I adding the quantities to achieve a total. It’s two pieces of information in something akin to a binary search.

I do woodworking and framing and approach is similar. Measure out to 6 feet first, then move out 3 inches more. It’s iterative refinement. To measure lengths I always do a few bisections like 3 feet, 2 inches, and 3/4 plus a sixteenth. I can remember a sequence of 3 or 4 integers for about a minute, long enough to transfer the measurement. Give me something like 135mm, and I’ll forget in a few seconds.

CyLith··on We've made the world too complicated
I strive for a “simple” lifestyle not because I believe it will be enjoyable. Quite the opposite. A simple lifestyle is much more laborious, arduous, and mentally taxing in terms of all the minutiae I need to worry about to achieve even modest levels of comfort. E.g. Do I have enough wood stored for the winter?

I strive for a simple life because it gives meaning to life, and a connection to the earth and other living things. It keeps me resilient in the face of hardship and less reliant on other people. It also provides a connection to the past and our heritage.

CyLith··on Points are a weird and inconsistent unit of measure
Because I don't want to deal with a hundred of anything, and I don't want to deal with decimal points. I want everything I measure to be near single digit numbers. Hence, inches for common dimensions like a "2x4". I can handle something being 5 1/4 inches. How the hell large is 133 mm? Humans are not good at intuiting numbers far from unity.

Miles are great. The typical highway speed limit is about a mile a minute. You can easily lower bound how long it will take to get somewhere if you know how far it is in miles.

In cooking, I often need to halve quantities in recipes, hence pounds and ounces. Watching cooking channels give metric quantities is absolutely baffling to me. You see things like 175 mL. That is 2 sigfigs too many.

CyLith··on Show HN: Full Python GUI apps in the browser – no JavaScript, no server
This is really neat, and I think I can use it in some of my projects as a simple front end to physical simulation tools. One question I have: do you have true 3D bindings? I see there is ImPlot3D, but right now I need to render meshes in OpenGL (or WebGL as the case will be). Is there a way for me to define shaders and feed it triangle soup?
CyLith··on Running Adobe's 1991 PostScript Interpreter in the Browser
This is the single reason I have not upgraded from OS 12.x. Postscript is key to many of my workflows.
CyLith··on Ask HN: Are We Destroying Earth?
Yes
CyLith··on Floating point from scratch: Hard Mode
And anyone implementing numerical algorithms is thankful for the tremendous amount of thought put into the fp spec. The complexity is worth it and makes the code much safer.
CyLith··on Chest Fridge (2009)
Perhaps the solution is to rethink the role of the fridge in the kitchen. It could be designed to be a part of a kitchen island, or have cabinets placed above it. In conventional kitchens, a chest does not make sense. But it could be well integrated if we start with the assumptions the fridge will be a chest.
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