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jcheng

1,299 karma · joined May 19, 2010

work email: joe AT posit DOT co
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jcheng··on Owed a billion dollars in Nvidia stock
Those shares were fine, it was the other 9,375 that were in question here.
jcheng··on How OpenAI Used Its Own LLMs to Design Its Jalapeño Chip
> Am I missing something?

If you’re sincerely asking…

Mathematically speaking, 18 / 3.6 isn’t “reducing” by 3.6X, it’s “dividing” by 3.6X. Reducing would be 18 - (18 * 3.6), which is obviously wrong. By your formula, “reducing by 50%” would be 18 / 0.5, also obviously wrong.

Yes, people do say things like “reduce by 3.6X” and are understood to mean what you said, but they also say “literally” when they mean “figuratively”. It doesn’t bother me but I can understand why math oriented people would be annoyed, and I personally would never say “reduced by 3.6X”, but instead “reduced by 72.2%”.

jcheng··on Ask HN: Who is using MCP in production?
They probably mean the tool APIs that the MCP server exposes are well designed. Definitely makes a big difference.
jcheng··on Being ambitious and being a dad
My own accomplishments make me go wheeeee but my kids’ accomplishments, even mundane ones, make me go WHEEEEEEEEE!
jcheng··on Meta data center water discharges suspended for contaminating water supply
According to the article this is a closed loop cooling system, once it’s up and running it doesn’t use any water. They run water through it during installation and that’s the discharge that they found bacteria in.
jcheng··on Show HN: Zanagrams
Fun game! On iOS I frequently triggered a double-tap zoom accidentally, and it’s weirdly difficult to zoom back out once that happens (a second double-tap doesn’t work, and pinch to zoom out only works in some areas of the page).
jcheng··on Show HN: Monolisa v3 – a typeface for developers and creatives
https://en.wikipedia.org/wiki/Menu_key is all I can think of, but that was introduced in 1994...
jcheng··on Pandoc Templates
I'm curious if Quarto could coordinate all of that for you automatically. It supports both code execution via Jupyter, and output via Typst (including books).

https://quarto.org/docs/computations/python.html

https://quarto.org/docs/output-formats/typst.html

https://quarto.org/docs/books/book-output.html#typst-output

https://quarto.org/docs/output-formats/typst-custom.html#boo...

jcheng··on Dropbox CEO Drew Houston to step down
Poor Drew, if only he’d taken Steve’s advice! /s
jcheng··on Greg Brockman interview [video]
I think you make a good point but the use of samples in hip hop doesn’t support it; those samples need to be licensed.
jcheng··on Qwen3.7-Max: The Agent Frontier
Here are some examples of the questions in the benchmark. If these are representative, they seem pretty cut and dry. https://artificialanalysis.ai/evaluations/omniscience#exampl...
jcheng··on Disney erased FiveThirtyEight
"Sometimes you have to change things that are perfectly good just to make them your own." --Jack Donaghy, 30 Rock
jcheng··on Mercedes-Benz commits to bringing back physical buttons
Former E36 owner here as well. What are "monkey pissers"?
jcheng··on Online age verification is the hill to die on
"Disingenuous?" Just because someone finds the style irksome, and chooses to share that here, they're deceptively, calculatingly trying to derail the conversation? That's an extremely cynical and uncharitable take.

If I were the author of the post, I'd value the feedback.

jcheng··on 404 Deno CEO not found
Open core can work, but you really have to find very strong product market fit on the proprietary side--ideally with features that discriminate between users who are relatively happy to pay and users who are not. (There's a reason "SSO tax" is so common.)

And you really have to believe in open source and have the discipline to keep investing in it, otherwise the temptation is ever present to throw more and more effort and resources into the proprietary parts.

jcheng··on (Media over QUIC) on a Boat
Quaid Army?
jcheng··on Pyodide: a Python distribution based on WebAssembly
For that purpose I think most people are using bubblewrap or seatbelt/sandbox-exec with CPython.
jcheng··on Google just gave Sundar Pichai a $692M pay package
> A percentage taken from the increase of an amount every year, is more than the same percentage taken at the end

It sounds like you're describing a hypothetical tax on unrealized gains? Do you have a link to the Buffet letter?

jcheng··on Google just gave Sundar Pichai a $692M pay package
You're thinking of realized capital gains, not tax on the exercise/grant. I don't think there is a way to dodge the latter, and you can't take out a loan or pass down options you never exercised or stocks you were never granted.
jcheng··on Google just gave Sundar Pichai a $692M pay package
Details: $2MM/year in salary, the rest in performance based incentives. The $692MM figure is based on hitting all of the maximums (200% of a few different targets) and is the total for three years.
jcheng··on I verified my LinkedIn identity. Here's what I handed over
Can you say more? Why isn't it neutral or slightly positive? I would assume that a KYC provider would want to protect their reputation more than the average company. If I were choosing a KYC provider I would definitely want to choose the one that had not been subject to any privacy scandals, and there are no network effects or monopoly power to protect them.
jcheng··on Cord: Coordinating Trees of AI Agents
That’s what this is. It’s just defining two types of subagent relationship (spawned and forked) and providing the minimal MCP API for controlling them. It’s up to the LLMs when and how to use subagents.
jcheng··on Warren Buffett dumps $1.7B of Amazon stock
The revenue curves do indeed look a bit different:

https://www.macrotrends.net/stocks/stock-comparison?s=revenu...

Even more so if you compare EBITDA:

https://www.macrotrends.net/stocks/stock-comparison?s=ebitda...

jcheng··on AGENTS.md outperforms skills in our agent evals
Would’ve been perfectly readable and no larger if they had used newline instead of pipe.
jcheng··on Don't fall into the anti-AI hype
Yeah... and besides managerial skills, also product (using the word loosely) sense, user empathy, clarity of vision, communication skills. They've always been multipliers for programmers, even more so in this moment.
jcheng··on Don't fall into the anti-AI hype
> 95% of Claude and 5% of you, while still better than me (and your average Joe), is nowhere near the same jump from 95% Claude and 5% me.

I see what you're saying, but I'm not sure it is true. Take simonw and tymscar, put them each in charge of a team of 19 engineers (of identical capabilities). Is the result "nowhere near the same jump" as simonw vs. tymscar alone? I think it's potentially a much bigger jump, if there are differences in who has better ideas and not just who can code the fastest.

jcheng··on Don't fall into the anti-AI hype
> For others, LLMs remove the core part of what makes programming fun for them.

Anecdotally, I’ve had a few coworkers go from putting themselves firmly in this category to saying “this is the most fun I’ve ever had in my career” in the last two months. The recent improvement in models and coding agents (Claude Code with Opus 4.5 in our case) is changing a lot of minds.

jcheng··on Anthropic blocks third-party use of Claude Code subscriptions
An engineer on my team who is working on TUI stuff said that avoiding the flicker is difficult without affecting the ability to copy/paste using the mouse (something to do with "alternate screen mode"). I haven't used OpenCode (yet) but Google does turn up some questions (and suggested workarounds) around copy/paste.
jcheng··on Anthropic blocks third-party use of Claude Code subscriptions
Arguably since 3.5, at least for coding and tool calling
jcheng··on Nvidia's $20B antitrust loophole
To make this right they’d just have to amend the first part to “secondary transaction with shareholders at some price that implies a 20b valuation”.

Has there been any evidence yet that the VCs got paid for their shares but the left behind employees didn’t?

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