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Simon Willison

Quoting OpenAI Codex base_instructions

Never talk about goblins, gremlins, raccoons, trolls, ogres, pigeons, or other animals or creatures unless it is absolutely and unambiguously relevant to the user's query. — OpenAI Codex base_instructions, for GPT-5.5 Tags: openai, ai, llms, system-prompts, prompt-engineering, codex-cli, generative-ai, gpt

Blog

Vibe code in Rust

If you are vibe coding and you don’t review any of the code, like a true vibe coder, you should build your system in Rust. I know, that’s a controversial statement. But hear me out. We will see how good ...

Chris Coyier

When Sites Need to Walk Away

The Internet Archive has a new book: VANISHING CULTURE. (Digital copy is free.) According to a Pew Research Center report, 26% of pages from 2013-2023 are no longer accessible. But that’s not the whole story. In a new study published ...

David Bushell

Alternative thoughts

My regular schedule of CSS and HTML tips will return after this brief look at the sorry state of the web and tech industry. It’s grim. “Our press secretary, Sean Spicer, gave alternative facts to that… Alternative facts - Kellyanne ...

Simon Willison

Quoting Matthew Yglesias

Five months in, I think I've decided that I don't want to vibecode — I want professionally managed software companies to use AI coding assistance to make more/better/cheaper software products that they sell to me for money. — Matthew Yglesias ...

Armin Ronacher

Before GitHub

GitHub was not the first home of my Open Source software. SourceForge was. Before GitHub, I had my own Trac installation. I had Subversion repositories, tickets, tarballs, and documentation on infrastructure I controlled. Later I moved projects to Bitbucket, back ...

Simon Willison

microsoft/VibeVoice

microsoft/VibeVoice VibeVoice is Microsoft's Whisper-style audio model for speech-to-text, MIT licensed and with speaker diarization built into the model. Microsoft released it on January 21st, 2026 but I hadn't tried it until today. Here's a one-liner to run it on ...

Daniel Miessler

AI Is Not the Villain (or the Hero)

A figure walks away from a cracking corporate tower toward humans connecting peer-to-peer/images/ai-is-not-the-villain.webp/images/ai-is-not-the-villain.webp Hey all, I want to take a moment to clarify what I think is happening with jobs, AI, and tech in general right now. The common narrative ...

David Bushell Notes

I’ve been listening to the Dungeon Crawler Carl audiobooks. The premise is fun and the story has its moments but I’d have given up if it wasn’t for the narrator Jeff Hays. I thought I was listening to a full ...

David Bushell Notes

replacements.fyi is a neat website that gives alternatives to 687 obsolete NPM packages. Crucially, it suggests modern JavaScript APIs and simple educational tips like how to check if a number is odd. This is from the Ecosystem Performance project that ...