Turbo Pascal 3.02A, deconstructed 🔗
<p><strong><a href="https://tools.simonwillison.net/turbo-pascal-deconstructed">Turbo Pascal 3.02A, deconstructed</a></strong></p> In <a href="h [...]
Simon Willison's Weblog
Posts
Quoting Kimi.ai @Kimi_Moonshot 🔗
<blockquote cite="https://twitter.com/Kimi_Moonshot/status/2035074972943831491"><p>Congrats to the <a href="https://x.com/cursor_ai">@cursor_ai</ [...]
Thoughts on OpenAI acquiring Astral and uv/ruff/ty 🔗
<p>The big news this morning: <a href="https://astral.sh/blog/openai">Astral to join OpenAI</a> (on the Astral blog) and <a href="https://openai. [...]
Autoresearching Apple's "LLM in a Flash" to run Qwen 397B locally 🔗
<p><strong><a href="https://twitter.com/danveloper/status/2034353876753592372">Autoresearching Apple's "LLM in a Flash" to run Qw [...]
Snowflake Cortex AI Escapes Sandbox and Executes Malware 🔗
<p><strong><a href="https://www.promptarmor.com/resources/snowflake-ai-escapes-sandbox-and-executes-malware">Snowflake Cortex AI Escapes Sandbox [...]
Quoting Ken Jin 🔗
<blockquote cite="https://fidget-spinner.github.io/posts/jit-on-track.html"><p>Great news—we’ve hit our (very modest) performance goals for the C [...]
GPT-5.4 mini and GPT-5.4 nano, which can describe 76,000 photos for $52 🔗
<p>OpenAI today: <a href="https://openai.com/index/introducing-gpt-5-4-mini-and-nano/">Introducing GPT‑5.4 mini and nano</a>. These models join G [...]
Quoting Tim Schilling 🔗
<blockquote cite="https://www.better-simple.com/django/2026/03/16/give-django-your-time-and-money/"><p>If you do not understand the ticket, if yo [...]
Subagents 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>LLMs are re [...]
Introducing Mistral Small 4 🔗
<p><strong><a href="https://mistral.ai/news/mistral-small-4">Introducing Mistral Small 4</a></strong></p> Big new release from Mistral today (de [...]
Use subagents and custom agents in Codex 🔗
<p><strong><a href="https://developers.openai.com/codex/subagents">Use subagents and custom agents in Codex</a></strong></p> Subagents were anno [...]
Quoting A member of Anthropic’s alignment-science team 🔗
<blockquote cite="https://www.newyorker.com/news/annals-of-inquiry/the-pentagon-went-to-war-with-anthropic-whats-really-at-stake?_sp=9a6e0ff7-2bf [...]
Quoting Guilherme Rambo 🔗
<blockquote cite="https://daringfireball.net/2026/03/apple_enclaves_neo_camera_indicator"><p>Tidbit: the software-based camera indicator light in [...]
Coding agents for data analysis 🔗
<p><strong><a href="https://simonw.github.io/nicar-2026-coding-agents/">Coding agents for data analysis</a></strong></p> Here's the handout I pr [...]
How coding agents work 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>As with any [...]
What is agentic engineering? 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>I use the t [...]
Quoting Jannis Leidel 🔗
<blockquote cite="https://jazzband.co/news/2026/03/14/sunsetting-jazzband"><p>GitHub’s <a href="https://www.theregister.com/2026/02/18/godot_main [...]
My fireside chat about agentic engineering at the Pragmatic Summit 🔗
<p>I was a speaker last month at the <a href="https://www.pragmaticsummit.com/">Pragmatic Summit</a> in San Francisco, where I participated in a [...]
1M context is now generally available for Opus 4.6 and Sonnet 4.6 🔗
<p><strong><a href="https://claude.com/blog/1m-context-ga">1M context is now generally available for Opus 4.6 and Sonnet 4.6</a></strong></p> He [...]
Quoting Craig Mod 🔗
<blockquote cite="https://craigmod.com/essays/software_bonkers/"><p>Simply put: It’s a big mess, and no off-the-shelf accounting software does wh [...]
Shopify/liquid: Performance: 53% faster parse+render, 61% fewer allocations 🔗
<p><strong><a href="https://github.com/Shopify/liquid/pull/2056">Shopify/liquid: Performance: 53% faster parse+render, 61% fewer allocations</a> [...]
MALUS - Clean Room as a Service 🔗
<p><strong><a href="https://malus.sh/">MALUS - Clean Room as a Service</a></strong></p> Brutal satire on the whole vibe-porting license washing [...]
Coding After Coders: The End of Computer Programming as We Know It 🔗
<p><strong><a href="https://www.nytimes.com/2026/03/12/magazine/ai-coding-programming-jobs-claude-chatgpt.html?unlocked_article_code=1.SlA.DBan. [...]
Quoting Les Orchard 🔗
<blockquote cite="https://blog.lmorchard.com/2026/03/11/grief-and-the-ai-split/"><p>Here's what I think is happening: AI-assisted coding is expos [...]
Sorting algorithms 🔗
<p><strong><a href="https://tools.simonwillison.net/sort-algorithms">Sorting algorithms</a></strong></p> Today in animated explanations built us [...]
Quoting John Carmack 🔗
<blockquote cite="https://twitter.com/ID_AA_Carmack/status/1405932642005041153"><p>It is hard for less experienced developers to appreciate how r [...]
AI should help us produce better code 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>Many develo [...]
Production query plans without production data 🔗
<p><strong><a href="https://boringsql.com/posts/portable-stats/">Production query plans without production data</a></strong></p> Radim Marek des [...]
Perhaps not Boring Technology after all 🔗
<p>A recurring concern I've seen regarding LLMs for programming is that they will push our technology choices towards the tools that are best rep [...]
Quoting Joseph Weizenbaum 🔗
<blockquote cite="https://archive.org/details/computerpowerhum0000weiz_v0i3?q=realized"><p>What I had not realized is that extremely short exposu [...]