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Posted by pretext 11 hours ago

Using Claude Code: The unreasonable effectiveness of HTML(twitter.com)
Examples: https://thariqs.github.io/html-effectiveness/

Related: https://simonwillison.net/2026/May/8/unreasonable-effectiven...

285 points | 177 commentspage 6
Diti 8 hours ago|
Claude understands AsciiDoc just fine. His training data makes it so that most AsciiDoc documents he generates uses Markdown-like capabilities, but a gentle push in an appended system prompt (like a “feel free to use all of AsciiDoc’s features”) makes him create very nice documents to iterate on, in my opinion.
postalcoder 10 hours ago||
Yeah, I agree with this. I've been doing the same thing. Whenever I have to do a review, I ask the llm to create a dashboard. It's a godsend for reducing cognitive burden.

I think the reason stuff like this wasn't done earlier was due to fears about context pollution, but post training has gotten so good that you can do virtually anything in the context window and not have it affect the quality of output.

Barbing 10 hours ago||
(Edit) nvm, the usual Xcancel (https://xcancel.com/trq212/status/2052809885763747935) just links to an article (http://x.com/i/article/2052796100608974848)
gabesullice 10 hours ago||
It's been confusing to me that so many people have treated markdown as the lingua franca for agent instructions when their training corpus must be dramatically biased to HTML instead of Mardown.

Markdown only makes sense for us meatbags becuse it's easy for us to edit and version control, but if you're sharing anything where the audience is an agent publicly, HTML must be just as interpretable.

isoprophlex 6 hours ago||
Each one trades a document you'd skim for one you'd actually read — emdash — or does it really? That entirely depends on your preference of course.

Classical overly confident llm bullshitting.

igtztorrero 1 hour ago||
I use obsidian MD editor to save important chats I made on Claude or Gemini.

It's the best markdown editor.

So when I need to check any past reference I just open my folder or files.

Html it's so ugly.

I wish IA products add a save al chat button, to avoid copy and paste every response.

doc_ick 9 hours ago||
~html has more capabilities than markdown~ the real title

Weren’t llms specifically originally set to output and print markdown format since it is simpler and easier everyone to read? No different rendering/libraries/apis to worry about…

realrocker 9 hours ago||
I am working on https://github.com/livetemplate/tinkerdown to leverage the the two effective outputs of LLMs : html and markdown . Still WIP
mmckelvy 3 hours ago||
Another great use case is piping database output (e.g. psql) directly to HTML. HTML tables can be opened in a browser or directly in Excel. So all you need for a complete BI tool is a database and the command line.
Kwpolska 9 hours ago|
I guess the author has never heard of Markdown editors with a preview feature, and doesn't know that the Claude Code VS Code plugin opens plans in preview mode.
weird-eye-issue 9 hours ago|
Are you just trying to pretend that Markdown is as rich as HTML and that all the use cases that they described are possible with Markdown?
mark_and_sweep 8 hours ago|||
Technically, yes. Markdown was always intended to be used for creating HTML and thus allows you to use HTML inline (with some minor caveats, see: https://daringfireball.net/projects/markdown/syntax#html).

If you rename a .html file to .md, your markdown viewer should render it just the same as your browser did.

jason1cho 9 hours ago|||
Markdown was a hype in late 2010s that has cooled down due to chatbots.

In turn, chatbots pump up markdown by making it the default output format.

albedoa 3 hours ago|||
> has cooled down due to chatbots.

What in the world.

k4rli 9 hours ago|||
I've felt the opposite. With MD being the preferred planning+documentation output for LLMs, the time of "hype" seems to be now. It seemed just a few years ago that devs hated writing properly formatted markdown.
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