simonw

38 ms·

781.
by simonw 3mo ago
Including the date in the system prompt - at the cost of a cache invalidation at midnight - is an entirely reasonable decision. Most other harnesses do the same thing. Including the full datetime would be irresponsible, but that's not
782.
by simonw 3mo ago
Have you watched the video where that was said, as opposed to just reading interpretations of it from people with their own assumptions? https://youtu.be/02YLwsCKUww?is=UsJrcLRgdSUd38Jt Here's a transcript: https:&#x2
783.
by simonw 3mo ago
I think he didn't know. We are at an impasse.
784.
by simonw 3mo ago
What was dishonest about that comment? > There’s a very high chance all this code gets thrown out completely. ... and a few days later he decided that the code wouldn't get thrown out. That doesn't make the comment itself disho
785.
by simonw 3mo ago
I feel like a year ago JavaScript and Python were the best languages for coding agents to use because of their heavier presence in the training data, but I'm not sure that's true any more now. The latest frontier models are compet
786.
by simonw 3mo ago
(I can't draw a pelican for this one because Alibaba Cloud have flagged my email address and won't let me pay them for access. So I'm waiting for the open weights release, or for the new model to show up on OpenRouter.)
787.
by simonw 3mo ago
Your comment here is fair, and it's why I take my disclosures seriously. Nobody is unbiased, no matter how hard they might try. I like to get my information from sources where I understand their motivations, so my approach is to try to
788.
by simonw 3mo ago
"If the LLM trained on GPL-derived code, what does that mean for the end result?" Either it means nothing at all, or it means that a substantial portion of the code produced at some of the world's most valuable companies over
789.
by simonw 3mo ago
It played out in public on the GitHub repository, so yes.
790.
by simonw 3mo ago
At a guess it's because Boris literally wrote a book on TypeScript: https://www.oreilly.com/library/view/programming-typescript/...
791.
by simonw 3mo ago
One of the best Django engineers I ever worked with had hardly any Django or Python experience when we hired them, but had done plenty of Rails. They were up and running and super-productive with Django within a week.
792.
by simonw 3mo ago
I think they bought Bun because it was a supply chain risk for them. Their new flagship product (earning them billions of dollars in revenue per month ) was dependent on a platform maintained by a tiny startup. Buying Bun was a very ration
793.
by simonw 3mo ago
I've not made any money at all from Anthropic. You can see my list of previous weekly blog sponsors here: https://simonwillison.net/dashboard/sponsor-history/ None of them get any influence on my content. T
794.
by simonw 3mo ago
Yeah, wildlife photography is a new hobby - it used to be every few months, now it's several times a week. I would be very surprised if one of my sightings posts made it to Hacker News. Maybe if I manage to snap a photo of an actual
795.
by simonw 3mo ago
I thought that too but it looks like the usage of unsafe hasn't been trending down over time: https://news.ycombinator.com/item?id=48966569#48967630
796.
by simonw 3mo ago
They decided on the tech stack for Claude Code over a year and a half ago.
797.
by simonw 3mo ago
I don't know for certain, but it seems likely that it is given that Jarred said "Claude Code v2.1.181 (released June 17th) and later use the Rust port of Bun". What motive could he have for secretly maintaining a private fork
798.
by simonw 3mo ago
I'm going to guess Anthropic are OK with "fully dependent on AI to fix whatever breaks".
799.
by simonw 3mo ago
> Blender is way more niche than Thunderbird Is that true though? I mean sure, more people use email - but I would guess there are more Blender users than Thunderbird users in the world. There's plenty of competition for an excellen
800.
by simonw 3mo ago
Thanks for that link, I really enjoyed that. I had no idea quite how varied the work people were creating with Blender was these days.
801.
by simonw 3mo ago
Huh, that's interesting. Sometimes that happens because HN's AI text detector kicks in, I've seen it against my comments that quoted from AI-generated text in the past. I don't see any hints of LLM writing in this articl
802.
by simonw 3mo ago
Did you create a burner account just to accuse me of bikeshedding Bun's release tag process?
803.
by simonw 3mo ago
"only covering AI" - don't miss my wildlife photography! https://simonwillison.net/elsewhere/sighting/ (Unless photos of actual pelicans count as "AI" content now.) I just shipped this fil
804.
by simonw 3mo ago
Yeah, it looks like they constantly repoint the "canary" tag at whatever they think should be the new canary release. I don't like that, personally. I think the project would be easier to reason about if they shipped alpha ve
805.
by simonw 3mo ago
Not much point making it closed source at this point, coding agent harnesses are trivial to reverse-engineer. Being open source was also a useful community lever they could pull when they were trying to catch up with Claude Code.
806.
by simonw 3mo ago
This comment inspired me to take a look at the trend of "unsafe" in the Bun code over time since the rewrite PR first landed - here are the commits where that number changed by at least 10: 2026-05-14 23427db 13907 2026-05-1
807.
by simonw 3mo ago
See my comments about this from six months ago: - https://news.ycombinator.com/item?id=46367224#46370862 - "I'm determined to normalize linking to one's own writing, provided it's relevant to the convers
808.
by simonw 3mo ago
Anthropic changed nothing since I wrote published this post a few hours ago - I updated my post to mention Bun canary since it was a point of confusion here on Hacker News.
809.
by simonw 3mo ago
Another interesting change in that commit is the addition of this section to the system prompt: Before taking a destructive action: - Make sure the action is clearly within the user's request. - Resolve the exact targets
810.
by simonw 3mo ago
I thought it was interesting. I didn't write this with Hacker News in mind. (I was actually half way through writing about something related, when I thought it would be interesting to see if I could prove that I had the Rust version of

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