I just this week vibe-coded a personal knowledge management app that reads all my org-mode and logseq files and answers questions, and can update them, with WebSpeech voice input. Now it's my todo manager, grocery list, "what do I need to do today?", "when did I get the leaves done the last few years?" and so on, even on mobile (bye bye Android-Emacs). It's just a basic chatbot with a few tools and access to my files, 100% customized for my personal needs, and it's great.