Show HN: Local-first CLI to make Obsidian vaults searchable for AI agents (github.com)

A new Go CLI tool called NoteBrain has been launched to enhance the functionality of Obsidian vaults, allowing users to create a fully offline knowledge backend specifically designed for AI coding agents. It indexes markdown notes into a local ChromaDB vector database, facilitating advanced features like semantic search, graph traversal, and hidden connection discovery. The tool is tailored for autonomous agents such as OpenCode and Google Antigravity, focusing on optimizing token usage and reducing latency. The significance of NoteBrain lies in its ability to transform personal knowledge management into a robust system for AI agents, enabling users to find notes by meaning rather than just keywords. It employs an ONNX embedding model for semantic search and supports multi-query searches to enhance complex topic retrieval. Other key features include knowledge graph traversal, advanced filtering options, and structured output for easy automation. This innovative approach not only streamlines the integration with AI tools but also encourages community engagement by allowing users to modify and adapt the tool to their unique workflows.