the CEO of a note-taking app just open sourced the AI skills he was quietly using in his own vault kepano runs Obsidian. millions of users, tiny team, the guy who wrote the "File over app" essay turns out for weeks he's been running Claude Code inside his personal vault with 5 private skills: 1) markdown that respects wikilinks, so nothing breaks the graph 2) Bases queries Claude actually writes correctly 3) canvas edits that don't corrupt the file 4) defuddle: feed it any URL, it strips the ads and drops a clean note into your vault 5) each one is a single SKILL.md. drop the folder into .claude/skills/ and Claude just.. speaks Obsidian no plugin store. no account. no cloud. MIT license, shipped under his own name the part i keep thinking about: his essay was called "File over app". this is the sequel, file over agent. your notes stay yours, the AI is a guest that learned your language your second brain just got hands. what it's still missing is a schedule. that part is in my pinned