How AI is changing software development with Simon Willison | Talking Postgres Ep42
What’s your gold standard for deciding whether AI-written code is ready for production? In Episode 42 of Talking Postgres, Simon Willison—creator of Datasette, co-creator of Django, and prolific open-source developer—joins Claire to share how AI is changing the way he builds software today. We dig into why his test for shipping AI-generated code is “Could I explain this to somebody else?”, how engineering management skills can be surprisingly useful when managing AI agents, and how the bottleneck is no longer writing code but understanding it. Also: personal credibility, deep research, the Winchester Mystery House, slop proxies, and Simon’s observation that “Features are cheap. That doesn’t mean you should build them all.”Chapters:
⏩ 00:00 Intro & music
⏩ 04:00 A week of work before breakfast
⏩ 09:12 Red-green TDD makes agents exercise every line
⏩ 14:42 A million lines mean nothing if you don’t understand it
⏩ 18:28 Finding low-hanging fruit among open PRs & issues
⏩ 22:07 Getting work done while walking the dog
⏩ 23:01 Gold standard: “Could I explain this to somebody else?”
⏩ 28:27 Slop proxies add no value at all
⏩ 30:49 Aggressive nitpicking reviews
⏩ 35:01 Everything in software engineering is about trade-offs
⏩ 41:16 Racoon heist game is only fun for 1 minute 15 seconds
⏩ 43:46 New Year’s resolution to be more ambitious
⏩ 48:11 You have to learn to throw things away
⏩ 51:57 Features are cheap. That doesn’t mean you should build them all
⏩ 1:00:45 Engineering management skills are so useful
⏩ 1:04:44 QA specialists should be having a great time
⏩ 1:07:53 Writing is thinking, don’t outsource it
⏩ 1:08:23 Skill atrophy is a choice you make
⏩ 1:10:07 I believe in people who are motivated
⏩ 1:11:55 Systems are not set up to deal with this volume
⏩ 1:18:48 Research agents stopped being absolute garbage
⏩ 1:21:49 The whole point of the “human in the loop”
⏩ 1:26:10 Dream: I want there to be more small businesses
📜 Full transcript available at: https://talkingpostgres.com/episodes/how-ai-is-changing-software-development-with-simon-willison/transcript
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Previously on Talking Postgres:
🔹 Talking Postgres podcast Ep 30 with Simon Willison: https://youtu.be/8SAqeJHsmRM?si=yVAmtidcdR1uOrcA
More Links mentioned in this episode:
🔹 Simon Willison’s Blog: https://simonwillison.net/
🔹 Datasette: https://datasette.io/
🔹 sqlite-utils: https://github.com/simonw/sqlite-utils
🔹 Simon’s Blog: Release of alchemy-utils 0.1a0: https://simonwillison.net/2026/Aug/12/alchemy-utils/
🔹 Sophie Alpert’s blog: There are no lossless transformations of natural-language text: https://sophiebits.com/2026/06/25/there-are-no-lossless-transformations-of-natural-language-text
🔹 Oxide and Friends: The Open Weight Revolution with Simon Willison: https://youtu.be/f_6TzmifxnI?si=JW6PlNJoqN37tvQo
🔹 Lenny’s Podcast: An AI state of the union: We’ve passed the inflection point: https://youtu.be/wc8FBhQtdsA?si=nt644X9UC6sdDMl9
🔹 Winchester Mystery House: https://en.wikipedia.org/wiki/Winchester_Mystery_House
🔹 Conceptual integrity in Mythical Man-Month: https://en.wikipedia.org/wiki/The_Mythical_Man-Month#Conceptual_integrity
🔹 Blog post: SQLite compressed text-history prototypes, by Simon Willison: https://simonwillison.net/2026/Aug/9/sqlite-text-history-prototype/
🔹 Simon’s miscellaneous tools repo: https://tools.simonwillison.net/
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