Claude can now create and edit files

Re:Claude can now create and edit files by simonw on Tuesday September 09, 2025 @02:22PM (#45186214)

I just published an extensive review of the new feature, which is actually Claude Code Interpreter (the official name, bafflingly, is Upgraded file creation and analysis - that's what you turn on in the features page at least).

I reverse-engineered it a bit, figured out its container specs, used it to render a PDF join diagram for a SQLite database and then re-ran a much more complex "recreate this chart from this screenshot and XLSX file" example that I previously ran against ChatGPT Code Interpreter last night.

Here's my review: https://simonwillison.net/2025/Sep/9/claude-code-interpreter...

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Re:Claude can now create and edit files by mdaniel on Tuesday September 09, 2025 @04:06PM (#45188060)

> Version Control

> github.com

pour one out for the GitLab hosted projects, or its less popular friends hosted on bitbucket, codeberg, forgejo, sourceforge, sourcehut, et al. So dumb.

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Re:Claude can now create and edit files by tyre on Tuesday September 09, 2025 @08:11PM (#45191359)

I’m sure they’ll add support, they literally just launched

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Re:Claude can now create and edit files by mdaniel on Tuesday September 09, 2025 @09:38PM (#45192011)

(a) it's not that GitLab just launched

(b) it's an allowlist rule, not rocket science

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Re:Claude can now create and edit files by EmielMols on Wednesday September 10, 2025 @01:02AM (#45193496)

Whitelisting these hosts mean they become extraction vectors for prompt manipulation. In fact it’s mentioned in the grant parent’s article at the end. So yes, it takes a while to do this right.

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Re:Claude can now create and edit files by vidarh on Wednesday September 10, 2025 @04:11AM (#45194722)

> (c) where's all this mythical "agent gonna do all the things for me" world?

If you're in a hurry: via mcp servers.

If you're not in a hurry, more and more of these kind of capabilities will end up getting integrated directly.

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Re:Claude can now create and edit files by plaguuuuuu on Wednesday September 10, 2025 @11:39AM (#45199313)

If they made Git decentralised, so that you could mirror stuff on github, it might solve that issue!

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Re:Claude can now create and edit files by dang on Tuesday September 09, 2025 @07:51PM (#45191176)

I've nicked a sentence from your article to use as the title above. Hope that's clearer!

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Re:Claude can now create and edit files by gk1 on Tuesday September 09, 2025 @08:12PM (#45191367)

Way less clear. Anthropic did it right and wrote about the “so what” instead of focusing on the underlying mechanics.

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Re:Claude can now create and edit files by johnfn on Tuesday September 09, 2025 @08:32PM (#45191551)

I find the new headline to be much more clear. Perhaps because I imagined Claude to already be able to "edit and create files" via Claude Code; the server-side container is the key difference.

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Re:Claude can now create and edit files by simonw on Wednesday September 10, 2025 @05:17AM (#45195210)

Yeah, that was my initial confusion: Claude can already create files using both the Artifacts feature and Claude Code, so "Claude can now create and edit files" didn't sound like a new feature to me. Finding out this was actually a full-blown sandboxed container environment with both Python and Node.js was far more interesting.

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Re:Claude can now create and edit files by adastra22 on Tuesday September 09, 2025 @09:52PM (#45192118)

The original headline made absolutely no sense to me, as a Claude user, and did not in fact convey what this would be used for.

Claude already has the ability to make or edit files, as artifacts in the web interface, and with the Write tool in Code.

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Re:Claude can now create and edit files by dboreham on Tuesday September 09, 2025 @09:55PM (#45192147)

Which is why I ignored this HN article for 7h until the title was changed...

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Re:Claude can now create and edit files by steve_adams_86 on Wednesday September 10, 2025 @02:36AM (#45194069)

Likewise, I read the original title and skipped over it because I assumed someone posted about the feature, not knowing it has been available for months already.

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Re:Claude can now create and edit files by mvdtnz on Tuesday September 09, 2025 @08:02PM (#45191272)

It's much less clear.

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Re:Claude can now create and edit files by swyx on Wednesday September 10, 2025 @04:39AM (#45194916)

yeah thats editorializing man, and not the good kind. leave that to simonw's blog.

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Re:Claude can now create and edit files by dang on Wednesday September 10, 2025 @02:58PM (#45202136)

I was a bit surprised by the pushback on this edit, which seems to me no different than the kind of editing we do day-in-day-out, and have done for a good 15 years.

Editorializing, in my understanding, is introducing spin or opinion, or cherry-picking a detail to highlight only one aspect of a story. It seems to me that this edit doesn't do that because it actually broadens the information in the title and corrects a misleading impression given by the original. The only way I could see this being a bad edit is if it's not actually true that Claude now has access to a server-side container environment. If it's accurate then it surely includes the file-creating-and-editing stuff that was spoken about before, along with a lot more important information—arbitrary computation is rather more than just editing files! No?

More at https://news.ycombinator.com/item?id=45202122.

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Re:Claude can now create and edit files by rob on Wednesday September 10, 2025 @05:23AM (#45195249)

https://news.ycombinator.com/newsguidelines.html

> Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize.

The word "container" doesn't even appear in the original post from Anthropic, let alone "server-side container environment."

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Re:Claude can now create and edit files by orra on Wednesday September 10, 2025 @08:26AM (#45196652)

Often in these conversations we forget that editing is different from editorializing. Editing can make meaning clearer! (In this example, reactions are mixed as to whether it was successful).

Editorializing, on the other hand, is about adding clickbait or bias.

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Re:Claude can now create and edit files by dang on Wednesday September 10, 2025 @02:57PM (#45202122)

Yup, that's the rule. I changed the title because the original one was arguably misleading (in much the way that calling a computer a 'file creator and editor' might be), but of course these are not exact arguments and YMMV.

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Re:Claude can now create and edit files by cjonas on Wednesday September 10, 2025 @02:48AM (#45194147)

Given their relationship with AWS, I wonder if this feature just runs the agent core code interpreter behind the scenes.

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Re:Claude can now create and edit files by brumar on Wednesday September 10, 2025 @11:06AM (#45198876)

These days, I spend time training people using this kind of tools. I am glad it's called as such. It's much comfortable to explain to a tech person that it's "badly named" and that it should have been named "Code Interpreter" instead than explaining to a non tech that the "Code Interpreter" feature is a new cool way to generate documents. Most people are not that comfortable with technology, so avoiding big words is a nice to have.

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