Obsidian MCP Second Brain Server

# Architecture Diagram (Mermaid) This diagram shows the high-level system architecture and data flow for the MCP Second Brain Server. > **Tip:** View this diagram using the [Mermaid Live Editor](https://mermaid.live/) or a compatible Markdown viewer. ````mermaid graph TD A[MCP Client<br/>Claude/VSCode] -->|MCP Protocol| B[MCP Server<br/>index.ts] B -->|Initialize| C[ObsidianVault<br/>vault.ts] C -->|Create Storage| D{Storage Factory<br/>storage-factory.ts} D -->|Default| E[DatabaseStorage<br/>database-storage.ts] D -->|--use-memory| F[MemoryStorage<br/>memory-storage.ts] E -->|Stores in| G[(SQLite DB<br/>.obsidian-mcp/notes.db)] F -->|Stores in| H[In-Memory<br/>Map + Fuse.js] C -->|Scan Files| I[Obsidian Vault<br/>*.md files] I -->|Parse Frontmatter| J[gray-matter] J -->|Index Notes| E J -->|Index Notes| F B -->|search_notes| C B -->|get_note| C B -->|get_notes_by_tag| C B -->|list_tags| C G -.->|FTS5 Search| E H -.->|Fuzzy Search| F style E fill:#4CAF50 style F fill:#2196F3 style G fill:#4CAF50 style H fill:#2196F3 ````