An AI state of the union: We’ve passed the inflection point, dark factories are coming, and automation timelines | Simon Willison
Source
Lenny Rachitsky
Author
Lenny Rachitsky
Date
Terms in this piece · Glossary
prompt injection — An attack that hides instructions in content an AI will read — a webpage, email, or document — tricking it into following the attacker instead of the user.
grounding — Tying a model's answers to checkable sources — retrieved documents, live data, tool results — instead of letting it answer from memory alone.
Why it matters
Simon Willison lays out the specific agentic engineering workflows he uses daily and the unsolved prompt-injection risks ('lethal trifecta') that anyone shipping AI agents needs to design around. It's a rare groundingTying a model's answers to checkable sources — retrieved documents, live data, tool results — instead of letting it answer from memory alone.Full definition →, hands-on take from someone building AI-native tooling rather than speculating about it.
Key quotes
“Using coding agents well is taking every inch of my 25 years of experience as a software engineer.”
Simon Willison
“I can fire up four agents in parallel and have them work on four different problems.
By 11am, I am wiped out.”
Simon Willison
“Today, probably 95% of the code that I produce, I didn't type it myself.”
Simon Willison
“We've been using these systems in increasingly unsafe ways.
This is going to catch up with us.”
Simon Willison
“The code is now good.
It's good code for my definition of good code at least.”
Simon Willison
Chapters
00:00Introduction to Simon Willison
02:40The November 2025 inflection point
08:01What's possible now with AI coding
10:42Vibe coding vs. agentic engineering
13:57The dark-factory pattern
20:41Where bottlenecks have shifted
23:36Where human brains will continue to be valuable
25:32Defending software engineers
29:12Why experienced engineers get better results
30:48Advice for avoiding the permanent underclass
33:52Leaning into AI to amplify your skills
35:12Why Simon says he's working harder than ever
37:23The market for pre-2022 human-written code
40:01Prediction: 50% of engineers writing 95% AI code by end of 2026
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