https://npm-stat.com/charts.html?package=openai-codex&from=2026-01-25&to=2026-05-25 … shows that installations of @openai/codex via NPM were about 100,000 per day in January, now over one million per day.
@simonw
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Coding agent interfaces leave developers’ IDEs
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Or does this reflect the fact that the most popular interfaces for coding agents nowadays no longer reside in developers' IDEs?
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Simonw studies Pope Leo XIV’s encyclical on AI
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When I woke up this morning, I didn't think I would spend a good part of the day familiarizing myself with Catholic theology, but here we are. Notes on Pope Leo XIV's encyclical on AI.
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Red/green TDD for agents with regression tests
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I am firmly in the red/green TDD team for agent code, I like having a test suite that protects against breaking old features when they make new changes – https://simonwillison.net/guides/agentic-engineering-patterns/red-green-tdd/ …
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Automated Tests for Coding Agent Code
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Do you include automated tests for the code that your coding agents write?
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Request for publication of GPT-4 architecture to clarify water estimates
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Given the scale of water estimates for the "bottle of water per generated email" that come from assumptions about GPT-4's architecture, it would be greatly in the interest of @OpenAI to publish the architecture of this now-retired, three-year-old model.
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Plugins affect empty state of new menu via datasette-agent
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Plugins can also affect the empty state of the new menu – the latest datasette-agent adds a form for kicking off a new agent conversation – live demo (if you sign in with GitHub) on https://t.co/hPpyS2cumO pic.twitter.com/tmWTmX7ZMc
— Simon Willison (@simonw) 25 mai 2026Plugins can also affect the empty state of the new menu – the latest datasette-agent adds a form for kicking off a new agent conversation – live demo (if you sign in with GitHub) on https://
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Simonw asks about Copilot Pro and Microsoft 365 Premium naming
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What's Copilot Pro? I found this story from October saying Microsoft weren't selling that any more, having replaced it with "Microsoft 365 Premium" https://
microsoft.com/en-us/microsof
t-365/blog/2025/10/01/meet-microsoft-365-premium-your-ai-and-productivity-powerhouse/
… (I cannot make any sense at all of Microsoft's product naming around this stuff) -
Avoiding prompt injection attacks to prevent data exfiltration
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I have a lot I need to write about that – I've been very careful to avoid any way that a prompt injection attack could exfiltrate data
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Testing Gemma 4 and Qwen with SQL generation quality comparison
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I've tried it with Gemma 4 and Qwen 3.5/3.6 so far, works well with the >4B models, sometimes works with 4B but they're more likely to mess up the SQL