Lenny Rachitsky · 3 min read · Gen AI Tools
An AI state of the union: We’ve passed the inflection point, dark factories are coming, and automation timelines | Simon Willison
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In this interview, Simon Willison argues we’ve reached an inflection point in AI-enabled development, with coding agents moving from 'mostly works' to reliably working around November 2025. He describes how he now writes most of his code from a phone, outlines daily agentic engineering patterns (red/green TDD, templates, hoarding), and envisions a future 'dark factory' where AI handles coding and QA. He also warns about prompt injection security risks and the broader impact on the tech workforce.
Key Takeaways
- AI coding agents have crossed the threshold from 'mostly works' to reliably producing working code, signaling a major shift in developer workflows.
- Agentic engineering patterns (red/green TDD, templates, hoarding) are practical habits for building with AI.
- The 'dark factory' concept describes a future where AI does coding and QA with minimal human intervention.
- Prompt injection remains a key security risk, with potential for serious AI-driven failures if not managed.
- Automation and AI impact are reshaping careers, with mid-career engineers facing unique risks as workflows become AI-centric.
Excerpt
Simon Willison is a prolific independent software developer, a blogger, and one of the most visible and trusted voices on the impact AI is having on builders. He co-created Django, the web framework that powers Instagram, Pinterest, and tens of thousands of other websites. He coined the term “prompt injection,” popularized the terms “AI slop” and “agentic engineering,” and has built over 100 open source projects, including Datasette, a data analysis tool used by investigative journalists worldwide. What makes Simon unique is that he’s made the leap from traditional software engineering to AI-native development more fully and visibly than almost…