What it does

Reflex indexes a project on your machine and searches it without any cloud service. It can be used from the command line, in scripts, or by AI coding assistants that support MCP, such as Claude Code and Cursor, and the site describes its results as deterministic and available offline. Beyond plain text search it offers symbol-aware lookups using Tree-sitter, regex and AST queries, reference finding, and import and dependency analysis, including circular and unused files. Full symbol extraction is listed for 15 languages, among them Rust, Python, Go, Java, TypeScript and JavaScript, and results can be returned as JSON. Over MCP an agent can call tools such as search_code, find_references and get_dependencies. Optional extras include a natural-language ask command that needs an AI provider you configure, and a generator that builds a documentation site from the index. The project is MIT licensed and installs through npm or Cargo. Its own benchmark notes say it does not reduce token use compared with built-in search; the benefit is added capability.

Capabilities

Local-first full-text code search that works offline
Symbol-aware queries using Tree-sitter, plus regex and AST search
Dependency analysis of imports, reverse imports, circular and unused files
Built-in MCP server with tools such as search_code and find_references
JSON output for scripts and agents
Optional natural-language search through an AI provider you configure

When to use it

Giving an AI coding agent precise symbol and reference lookups over a large codebase
Finding every usage of a symbol or mapping what imports a file
Searching code in scripts or CI with machine-readable output
Searching a codebase locally without relying on a cloud service