Yeah, their previous version of this ran JavaScript directly in the user's browser – but this server-side execution is a new direction. Here are my notes on the older tool:
@simonw
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GitHub Accessibility: Details on AI Integration Scope
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Good question, @JeremyDanielFox @alexalbert__ any details on how much of GitHub is accessible?
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File Sharing Improvements and Size Limit Increases for AI Tools
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What I most want is: – More relaxed sharing rules (it's annoying that files are stripped from shared transcripts)
– Increase in file sizes (I want to upload a 120MB SQLite DB file)
– A genuinely great name for the feature! -
Claude Code Interpreter Successfully Recreates Charts from Screenshots
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I re-ran the chart recreation from a screenshot and XLSX file experiment in the brand new Claude Code Interpreter feature (against Claude Sonnet 4) and got satisfactory results from that as well https://
simonwillison.net/2025/Sep/9/cla
ude-code-interpreter/#something-much-harder-recreating-the-ai-adoption-chart
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Joscha Bach’s Tasteful Take on AI Thinking
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Joscha Bach somehow managed to create a moderately tasteful version of what we've all been thinking
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Anthropic’s New Feature Name Gets Heavily Criticized
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Here's proof that Anthropic really did pick a legendarily bad name for this new feature
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AI Labs Struggle with Feature Naming and Explanation
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I'll stop making fun of AI labs for sucking at naming things when they stop sucking at naming things https://
simonwillison.net/2025/Sep/9/cla
ude-code-interpreter/#ai-labs-find-explaining-this-feature-incredibly-difficult
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PyPI NPM GitHub Access Restrictions Policy Implementation
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A little bit – they've allowlisted PyPI and NPM and GitHub but blocked access to almost everything else
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ChatGPT Feature Comparison with Anthropic’s Implementation
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Yeah, it's been one of my favorite features of ChatGPT for over two years now, I'm glad to see Anthropic copy it more closely. Here are my previous notes on it:
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Claude generates Python chart code from uploaded XLSX file
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It's very good! It took a little bit of prompting but I managed to get it to recreate the chart on the left using Python and matplotlib against an XLSX file that I uploaded to Claude