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Repository Install

Ultra-fast indexed code search engine — faster than ripgrep on repeated searches, lighter than zoekt. Built-in MCP server for AI agents. Also does fast file finding (fd/find alternative).

概要

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. - — trigram inverted index makes repeated searches 2-46x faster than ripgrep - — --find mode locates files 2-15x faster than fd - — built-in Model Context Protocol server for AI coding tools (Claude Code, Cursor, etc.) - — --format llm produces Markdown with language tags, context lines, and token-aware truncation - — search only changed files (--changed), recent commits (--since 1h), respects .gitignore - — install via cargo/npm/pip, then xg "pattern". Index builds automatically on first search - — files edited since the last index build are rescanned on every search; on Linux, xg serve watches the tree so this check costs ~0.

README

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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
  • Always fresh — files edited since the last index build are rescanned on every search; on Linux, xg serve watches the tree so this check costs ~0.1ms
  • Syntax-aware — tree-sitter outlines (--outline), enclosing-block results (--expand block), definitions, references and a repo map for Rust, Python, JS/TS, Go, Java, C/C++ and Ruby
  • Boolean and history search — file-level --and / --not, search inside git diff (--in-diff) or commit messages (--log)

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 ~13% of source (+6% build-only sidecar)
AI agent integration None None MCP server built-in

xgrep is not a ripgrep replacement. Use ripgrep for one-off searches. Use xgrep when you search the same codebase repeatedly — the index pays for itself after ~2 searches.

Installation

Choose your package manager:

# Rust (recommended — native binary, no runtime)
cargo install xgrep-search    # Requires Rust 1.85+

# npm (Node.js 18+)
npm install -g xgrep

# pip (Python 3.8+)
pip install xgrep-search

Prebuilt binaries are also available on the Releases page.

GitHub で README 全文を見る

インストール

This server does not publish a one-line install command.

Open the repository installation guide MCP 初心者？mcpskill.org のガイドから始めましょう →

設定

{ "mcpServers": { "xgrep": { "command": "xg", "args": ["serve"] } } }