momokun7/xgrep

xgrep

Ultra-fast indexed code search engine with MCP server for AI coding tools.

Pre-builds a trigram inverted index, then searches in milliseconds. Designed for repeated searches on large codebases — by humans and AI agents alike.

Features

• Indexed search — trigram inverted index makes repeated searches 2-46x faster than ripgrep
• File discovery — --find mode locates files 2-15x faster than fd
• MCP server — built-in Model Context Protocol server for AI coding tools (Claude Code, Cursor, etc.)
• LLM-optimized output — --format llm produces Markdown with language tags, context lines, and token-aware truncation
• Git-aware — search only changed files (--changed), recent commits (--since 1h), respects .gitignore
• Zero config — install via cargo/npm/pip, then xg "pattern". Index builds automatically on first search
• Hybrid search — serves results from index instantly while rebuilding in the background

Why xgrep?

| | ripgrep | zoekt | xgrep | |---|---------|-------|-------| | Setup | None | Server required | None (cargo/npm/pip) | | First search | Instant | After server start | Auto-builds index | | Repeated search (Linux kernel) | 1,687ms | 170ms (server) | 37ms | | File discovery (next.js, 26K files) | N/A | N/A | 9ms (fd: 191ms) | | Index size | N/A | 155% of source | 8% of source | | AI agent integration | None | None | MCP server built-in | | Memory (search) | 11MB | 288MB