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AIOct 20, 2026 · 7:50 PM ET · Simon Willison

eMudhra Intermediate CA Compromise This is very, very bad news: The private keys of eight eMudhra intermediate CA certificates have been compromised. They chain to roots trusted by the Mozilla, Microsoft, Apple and Chrome root programs and by many downstream trust stores. Any software that bundles a list of trusted certificates needs to be updated. This site is tracking software updates via this...

Builder score 33Why it scoresRules judge: AI item; Source: Simon Willison.
AIOct 20, 2026 · 3:34 PM ET · Simon Willison

My latest vibe coded game experiment is a Command & Conquer style RTS (Real Time Strategy) game called Battle Drones ( play it here ). Unlike my previous experiments , this one is actually fun to play . I'm somewhat embarrassed to admit that I got there by telling Claude to "Make it a LOT more fun". It also supports multiplayer between nearby devices using audio to synchronize game state! Here's...

Builder score 33Why it scoresRules judge: AI item; Source: Simon Willison.
AIOct 20, 2026 · 1:21 AM ET · Latent Space

Congrats to DeepSeek V4.1 Flash 1017, MiniMax M3.1 Flash, and Mercury 3 (details below) but they’re not going to be in super wide use just yet.

Builder score 33Why it scoresRules judge: AI item; Source: Latent Space.
AIOct 19, 2026 · 8:00 PM ET · OpenAI News

OpenAI is acquiring Orchestra Bio to bring AI-powered operations to life sciences R&D, helping biopharma teams accelerate drug development and advance new treatments.

Builder score 33Why it scoresRules judge: AI item; Source: OpenAI News.
AIOct 19, 2026 · 7:58 PM ET · Simon Willison

My obituary for programming Jeremy Scheff poignantly captures the key loss caused by coding agents for career programmers who enjoyed the puzzle of developing code: Programming turned into one of the greatest jobs you could imagine. You got paid to work on tricky little logic puzzles. The trickier the puzzle, the more you got paid. But even pretty simple puzzles were worth a lot of money because...

Builder score 67Why it scoresRules judge: AI item; Topics: agents, labor share; Source: Simon Willison.
AIOct 19, 2026 · 8:00 AM ET · OpenAI News

Learn how OpenAI is improving ChatGPT across low-resource programming languages, with new evaluations for software engineering, SQLite, and COBOL migration.

Builder score 33Why it scoresRules judge: AI item; Source: OpenAI News.
AIOct 18, 2026 · 7:43 PM ET · Simon Willison

Release: llm-tools-datasette 0.1.1 When I switched LLM over to httpx2 in LLM 0.33 I forget that this would break any plugins which used httpx without directly depending on it. llm-tools-datasette was one of those plugins, now fixed. Tags: datasette , llm

Builder score 33Why it scoresRules judge: AI item; Source: Simon Willison.
AIOct 18, 2026 · 7:16 PM ET · Simon Willison

Release: llm-echo 0.5 I'm working towards a new LLM release, and testing PRs caused me to revisit the llm-echo debug plugin. This plugin provides a "model" which doesn't involve an LLM at all - it just repeats back the prompts that have been fed to it. The new release now updates the simulated token usage counts to take tool calls, system prompts, and reasoning tokens into account. Example usage...

Builder score 33Why it scoresRules judge: AI item; Source: Simon Willison.
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