Simon Willison’s Weblog

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Bluesky Thread Viewer thread by @simonwillison.net. I've been having a lot of fun hacking on my Bluesky Thread Viewer JavaScript tool with Claude Code recently. Here it renders a thread (complete with demo video) talking about the latest improvements to the tool itself.

This short animated GIF demo starts with the Thread by @simonwillison.net page where a URL to a Bluesky post has been entered and a Fetch Thread button clicked. The thread is shown as a nested collection of replies. A "Hide other replies" button hides the replies revealing just the top-level self-replies by the original author - and turns into a "Show 11 other replies" button when toggled. There are tabs for Thread View and Most Recent First - the latter when clicked shows a linear list of posts with the most recent at the top. There are "Copy" and Copy JSON" green buttons at the top of the page.

I've been mostly vibe-coding this thing since April, now spanning 15 commits with contributions from ChatGPT, Claude, Claude Code for Web and Claude Code on my laptop. Each of those commits links to the transcript that created the changes in the commit.

Bluesky is a lot of fun to build tools like this against because the API supports CORS (so you can talk to it from an HTML+JavaScript page hosted anywhere) and doesn't require authentication.

Posted 28th November 2025 at 11:57 pm

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