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Simon Willison on the 'Dark Factory' Pattern in AI Engineering
Simon Willison on the 'Dark Factory' Pattern in AI Engineering
 ### Lenny Rachitsky@lennysan
I asked @simonw what the next leap in AI software engineering is likely to be.
He explained the "dark factory" pattern where teams don't write any code or even look at their code.
00:53
#### Lenny Rachitsky
@lennysan · 23h ago
"Using coding agents well is taking every inch of my 25 years of experience as a software engineer."
Simon Willison (@simonw) is one of the most prolific independent software engineers and most trusted voices on how AI is changing the craft of building software. He co-created Django, coined the term "prompt injection," and popularized the terms "agentic engineering" and "AI slop."
In our in-depth conversation, we discuss:
🔸 Why November 2025 was an inflection point
🔸 The "dark factory" pattern
🔸 Why mid-career engineers (not juniors) are the most at risk right now
🔸 Three agentic engineering patterns he uses daily: red/green TDD, thin templates, hoarding
🔸 Why he writes 95% of his code from his phone while walking the dog
🔸 Why he thinks we're headed for an AI Challenger disaster
🔸 How a pelican riding a bicycle became the unofficial benchmark for AI model quality
Listenyoutu.be/wc8FBhQtdsAEIyOehU8 Show More
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Apr 3, 2026, 4:31 PM View on X
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12.9K Views  Lenny Rachitsky @lennysan
One Sentence Summary
Lenny Rachitsky interviews Simon Willison on the future of AI software engineering, highlighting the 'dark factory' pattern where developers no longer write or inspect code.
Summary
This tweet promotes an in-depth podcast conversation with Simon Willison, a prominent voice in AI software engineering. The discussion covers significant shifts in the craft, including the 'dark factory' pattern, risks to mid-career engineers, and practical agentic engineering workflows such as red/green TDD and thin templates. It provides high-level insights into how AI is fundamentally changing software development.
AI Score
90
Influence Score 21
Published At Today
Language
English
Tags
AI Engineering
Simon Willison
Dark Factory
Agentic Engineering
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