Notes on software, research findings, and wine.https://juhokoskela.fi/enhttps://juhokoskela.fi/tech/swift-6-4-diagnose-diagnostic-groups/https://juhokoskela.fi/tech/swift-6-4-diagnose-diagnostic-groups/The complete list of Swift 6.4 diagnostic groups for @diagnose, -Werror and -Wwarning. Finding these names shouldn't be this annoying.Tue, 15 Sep 2026 00:00:00 GMThttps://juhokoskela.fi/research/a-benchmark-score-is-not-a-model/https://juhokoskela.fi/research/a-benchmark-score-is-not-a-model/Three models can share a benchmark score and still require completely different supervision. Two tiny Go tasks showed why.Tue, 25 Aug 2026 00:00:00 GMThttps://juhokoskela.fi/research/how-do-you-ask-whether-an-ai-can-feel/https://juhokoskela.fi/research/how-do-you-ask-whether-an-ai-can-feel/Explain the topic too well and you've taught respondents the answer. Don't explain it enough and they may not understand the question.Sat, 22 Aug 2026 00:00:00 GMThttps://juhokoskela.fi/wine/champagne-delusions-of-grandeur/https://juhokoskela.fi/wine/champagne-delusions-of-grandeur/Excellent Champagne starts around 50 €. It also keeps going past 200 € with ease. At some point, surely, this stops being about better wine.Fri, 21 Aug 2026 00:00:00 GMThttps://juhokoskela.fi/tech/the-return-of-bespoke-software/https://juhokoskela.fi/tech/the-return-of-bespoke-software/For years, building internal software instead of buying SaaS was usually a bad idea. Coding agents have moved that boundary.Sun, 12 Jul 2026 00:00:00 GMT