1 post_calendar_day 2026-06-20 The posts written that day. https://vutuv.de/system/posts/2026/6/20 https://vutuv.de/system/posts/2026/6/20.json https://vutuv.de/system/posts/2026/6/20.txt https://vutuv.de/system/posts/2026/6/20.md https://vutuv.de/system/posts/2026/6/20.xml Testing this self-improvement rule for my Claude Code setup: Stefan Wintermeyer wintermeyer https://vutuv.de/wintermeyer https://vutuv.de/wintermeyer/posts/019ee5f7-ef5c-7a10-bb29-a5094a6c5939 2026-09-05T10:52:18Z 3