Obsidian Brain

Connects Claude to your Obsidian vault with semantic search, knowledge graph analytics, and file editing without requiring any plugin or the Obsidian app running. Runs as a local stdio process that indexes markdown files directly from disk, exposing 18 tools including PageRank note ranking, Louvain community detection for theme clustering, and hybrid retrieval that fuses chunk-level embeddings with BM25. Embeddings stay local via transformers.js or Ollama providers like nomic-embed-text. Ships with FTS5 and vec0 SQLite indexes for microsecond reads and incremental writes. The optional companion plugin adds live runtime state for active editor context and Dataview queries when Obsidian is open. Reach for this when you want AI that can navigate and reason over your personal knowledge base structure, not just grep through files.