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jdkoeck

849 karma · joined October 7, 2009

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jdkoeck··on The gauge broke: devs felt 20% faster with AI, measured 19% slower (2025)
> The honest counter, and it matters here more than usual. This is most likely the dip in a J-curve, not the destination.

Oh, the irony of this post being AI-generated.

jdkoeck··on Ending respiratory infections
This is Linus Pauling all over again.
jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
> Would love to see you convince the landlords to refurbish the building to use expensive heatpumps when gas is already in place.

They've been redoing the insulation since new regulation was enforced in France and Germany, it's been years now. So, that kind of thing is doable, except billions have been spent for a dubious result (look it up, Germans heat just as much as before). I am appalled at the complete lack of information on these subjects. For shame.

EDIT: Fact checking myself, the Germans have been reducing their heating, but significantly lower than expected because of a rebound effect (part of the efficiency gain is converted into comfort).

jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
That’s a fair point. More years of life lost due to gun deaths.

I still like to draw a parallel, because they’re both deaths that we have the means to prevent, but the culture perpetuates the problem. That culture needs to change (doable in Europe with regard to AC because heatwaves will snap people out of denial, much harder or impossible to solve the gun culture problem in the US).

jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
« Heating is absurdly expensive with leaky building so people prioritize insulating. »

Nope, heat pumps are cheaper and more efficient. Insulating did not even make a dent in reducing emissions in Germany after years of trying.

Whataboutism about cold related deaths doesn’t change anything about the heat related deaths. Did you know the Philippines lose fewer people to heat than Europe, per capita? They have AC.

Again, you’ve been misinformed. Please research the subject, use an LLM, whatever you need. The information is right there.

jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
Something needs to be done with the heat. The common euro talking point: aircon doesn’t solve the problem, let’s insulate instead (an order of magnitude more expensive). Apparently you entertain an even more absurd idea: let’s just do nothing, because everyone is too poor. That’s just wrong, plenty of home owners or real estate owners have the means to foot the bills, especially if regulation mandates or subsidises heat pumps.

Besides that, just know you’re participating in a system of belief that needlessly kills thousands each year (and many more to come, if you believe as I hope that climate change is real). Just dwell on it a little. Thousands dead because of ideological comfort and resistance to change, which in and of itself is a weird form of climate skepticism.

If you answer this, please address each of my points from both comments. You have adressed none so far.

jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
That’s because you pay attention to your body and you’re not in denial. Above 37 degrees, your body cannot regulate itself, and it starts being seriously uncomfortable before that. Going outside for a run when it’s 40 is unbelievably stupid.
jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
Thousands will die, but one guy went jogging at 40 degrees outside so it’s okay.
jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
Unless the aircon is a heat pump, in which case it’s also useful in the winter, it’s more efficient and carbon neutral if your electricity grid is decarbonised.

If most people can’t afford a heat pump, why do we entertain the idea of making them pay an order of magnitude more to better insulate their home, which doesn’t even work in the end?

You’ve been misinformed by European media. Please do your research, it’s all online.

jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
Same in France. The trick is to wait for a control visit, and then turn on the cooling.
jdkoeck··on Extreme Heat conference cancelled due to extreme heat warning
That kind of thinking kills more people each year in Europe than guns do in the USA. Let that sink in.
jdkoeck··on Peopleless economy? Not technically impossible
If he is confident enough to make economic predictions, it’s only fair that we take him to task on these.
jdkoeck··on Mornings and nights no longer exist at 47C: A day in the hottest place in India
Does the « greed of the few » include the masses who use air travel across the world, who use cars, who rely on energy infrastructure? I guess the answer is somehow no, because this is populist drivel of the worst kind. Did not expect that here.
jdkoeck··on It's Not Just X. It's Y
This is honestly a very, very naive statement. We are social animals and we naturally gravitate towards devaluing and shaming certain styles of speech. We police speech already! It’s often unfortunate, but it’s not devoid of function. I, for one, am happy with shaming LLM speech. It’s never been so easy to detect lazy thinking.
jdkoeck··on Snowboard Kids 2 is 100% Decompiled
What a strange way to spell Zelda Ocarina of Time!
jdkoeck··on From Rust to Ruby
It’s short term happiness at best, and at the expense of every other possible architectural characteristic (maintainability, performance, reliability, scalability, you name it).
jdkoeck··on Pope Leo XIV’s first encyclical Magnifica humanitas to be published May 25
I suggest a look at the recent economic development of Bangladesh, if you want something less abstract to illustrate the point that the reduction in poverty is very noticeable.

You would think that a great reduction in extreme poverty would give people pause, but it is almost always barely acknowledged. The strange conclusion is that people who tell you they care the most about poverty do not actually care about it in the slightest. It is just a vehicle for their resentment.

jdkoeck··on Pope Leo XIV’s first encyclical Magnifica humanitas to be published May 25
A cursory look at the fall of extreme poverty across the world, over the last few decades, is enough to refute the idea that the world is largely based on exploitation.
jdkoeck··on Crystals found inside wreckage from the first nuclear bomb test
Interesting! Is it any good? Did it age well?
jdkoeck··on I am building a cloud
A nice bonus is that sysadmin tasks tend to be light in terms of token usage, that’s very convenient given the increasingly strict usage limits these days.
jdkoeck··on Parallel agents in Zed
No need for any AI-specific tool, this is exactly what devcontainer is for! Just tell your agent to use devcontainer up (and docker compose down the other way).
jdkoeck··on Over-editing refers to a model modifying code beyond what is necessary
Tell me you’re using Codex without telling me you’re using Codex :)
jdkoeck··on Over-editing refers to a model modifying code beyond what is necessary
The thing is, with manual coding, you spot a view in the distance, you trek your way for a few hours, and you realize when you get there that the view isn’t as great as you thought it was.

With LLM-assisted coding, you skip the trek and you instantly know that’s not it.

jdkoeck··on OpenClaw isn't fooling me. I remember MS-DOS
I have Hermes agent run a cron each hour to check if the Steam Controller if finally on sale. I don’t if that resonates with you, I quite like that use case personally :)
jdkoeck··on jj – the CLI for Jujutsu
Thanks for the explanation! I wish I could edit my comment to reflect the truth.
jdkoeck··on jj – the CLI for Jujutsu
Wow, that’s a total deal breaker to me. Using git may require a complex mental model, but at least it’s not doing anything I didn’t ask for.
jdkoeck··on The Last Quiet Thing
It sure looks like the author likes webpages coming alive too!
jdkoeck··on 1M context is now generally available for Opus 4.6 and Sonnet 4.6
Undefined variable references? Did you not instruct it to run typescript after changes?
jdkoeck··on What I learned building an opinionated and minimal coding agent
That argument seems to assume a security model where the default prior is « no hostile agent ». But that’s the problem, any agent can be made hostile with a successful prompt injection attack. Basically, assuming there’s no hostile agent is the same as assuming there’s no attacker. I think we can agree a security model that assumes no attacker is insufficient.
jdkoeck··on What I learned building an opinionated and minimal coding agent
Internet access is required to install third party packages, so given the choice almost no one would disable it for a coding agent sandbox.

In practice, it seems to me that the sandbox is only good enough to limit file system access to a certain project, everything else (code or secret exfiltration, installing vulnerable packages, adding prompt injection attacks for others to run) is game if you’re in YOLO mode like pi here.

Maybe a finer grained approach based on capabilities would help: https://simonwillison.net/2025/Apr/11/camel/

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