Obsidian Might Be the Perfect Interface for AI Agents

Obsidian's new CLI makes it a compelling interface layer between users and AI agents. By storing LLM-generated knowledge as markdown files in Obsidian, agents gain structured memory with note-aware search, backlinks, and graph traversal rather than raw file scanning. The post walks through setting up the Obsidian CLI, integrating it with the Piy agent via a plugin, and layering on Graphifi — a knowledge graph tool that indexes notes to reduce token usage and enable semantic querying. The core argument is that markdown-based, portable, scriptable notes beat proprietary AI note-taking tools because they remain under your control and work with any tooling.