mgrep

mgrep is a command-line tool for natural-language semantic search across codebases and files. It indexes repositories using background watching, respects .gitignore rules, and supports searching code, text, PDFs, and images with multilingual capabilities. The tool is designed for both developers and AI coding agents, with integrations for Claude Code and other agent frameworks.

The project emphasizes a calm, minimal interface with thoughtful defaults and escape hatches. It includes web search capabilities to query alongside local files, and the makers report it reduces token usage for agents by 2x while maintaining performance. Authentication supports both browser login and API key flows for CI/CD environments.