<?xml version="1.0" encoding="UTF-8"?><urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:news="http://www.google.com/schemas/sitemap-news/0.9"><url><loc>https://www.christianullrich.com/p/when-reuse-is-not-visible-teams-cannot-learn-from-chatgpt-usage</loc><news:news><news:publication><news:name>Christian Ullrich</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-23T06:00:55+00:00</news:publication_date><news:title>When reuse is not visible, teams cannot learn from ChatGPT usage</news:title></news:news></url><url><loc>https://www.christianullrich.com/p/when-leaders-delegate-chatgpt-use-they-lose-control-over-outcomes</loc><news:news><news:publication><news:name>Christian Ullrich</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-22T06:02:44+00:00</news:publication_date><news:title>When leaders delegate ChatGPT use, they lose control over outcomes</news:title></news:news></url></urlset>