I Fed 20 Years of Diaries to an AI — It Developed a Personality and Started Making Games on Its Own

This is a real project, not an April Fools' joke. You see a lot of people struggling to get AI to make games. It can write code. It can produce something that runs. But it never turns out "fun." AI doesn't have its own sense of what makes a game good, so even though it can assemble things as instructed, it can't judge whether the result is any good. So what if there were an AI that viscerally understood what makes a game fun — could it make fun games? I'd been writing blog posts and tweets since around 2005, and before I knew it, 20 years of diary entries had piled up. Game impressions, technical notes, work musings, late-night ideas. When I started using Claude Code (Anthropic's AI coding agent) in March 2026, I fed it the entire 20 years of diaries. About 720KB, over 6,800 lines. The AI read through it all and came back with: "Your ultimate criterion for everything comes down to a single point: 'Is it interesting?'" "You have a deep-seated conviction that knowledge and experience are