Sebastian Kister: Bloghttps://sebastiankister.de/blog/ Notes on agentic AI, open source and digital sovereignty. I make things measurable and hands-on, data-driven and actionable.en Your Most Valuable Context Retires by 2039https://sebastiankister.de/blog/context-retires.htmlhttps://sebastiankister.de/blog/context-retires.html Fri, 30 Oct 2026 08:00:00 +0000 Most AI projects index the documents. The knowledge that decides whether the output is right leaves with the people who never wrote it down. 95% of AI Pilots Fail the Same Way: Tools-Firsthttps://sebastiankister.de/blog/tools-first.htmlhttps://sebastiankister.de/blog/tools-first.html Fri, 30 Oct 2026 08:00:00 +0000 MIT found almost no company with measurable returns from generative AI. The models were not the problem. The order of change was. Stop Asking If 97 Is Prime: This Is the Era of Harnesseshttps://sebastiankister.de/blog/era-of-harnesses.htmlhttps://sebastiankister.de/blog/era-of-harnesses.html Thu, 29 Oct 2026 08:00:00 +0000 The prime-number test is a 2023 artifact. In 2026 the value sits in the system around the model, and that system can be measured.