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Posted by pretext 9 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...

218 points | 124 commentspage 4
LunicLynx 6 hours ago|
Markdown is not necessarily about presentation. It’s about structure that carries information.

Surely a html page could do the same but I would see that as the last step, to give to someone else.

htch 7 hours ago||
We’ve been doing this for a couple of months at work for internal memos and decision records, it’s really powerful. I love being able to drop in interactive visuals and more dynamic content. We have a Cloudflare R2-backed Document Store for managing them, and CLI for publishing, and I’m working on an MCP server for long-term discovery and context.

My team kept asking if they could leave comments though, so I built Annotent [1] to help with that, which is also MCP-backed.

1. https://www.annotent.com/

isoprophlex 4 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.

Diti 6 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.
forgotusername6 6 hours ago||
I've been struggling with markdown recently as I really want the claims it makes in documents to be programmatically verifiable e.g. citations, I want a simple script to check that each of the files and lines of code it references actually exist. Perhaps HTML can be used for this. It certainly has a better chance than markdown.
whatever1 8 hours ago||
Do we have local first html renderers that don’t complain about cors and wrong file addresses? I don’t want to spin up a server just to open an HTML file
postalcoder 8 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 8 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 8 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.

doc_ick 7 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…

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