fff

Why we included this project

Repeated ripgrep or fzf calls add latency and eat context every time an agent hunts for a file. fff keeps a typo-resistant path and content index in memory, ranks results by how often files are accessed, and runs a background watcher, so lookups stay quick in any process that searches more than once. It started life as a Neovim plugin and still works there, but the library is what powers file search in opencode, nushell, and other tools. There are bindings for Rust, C, Python, Bun, and Node.js, plus an MCP server that plugs into Claude Code, Codex, Cursor, and Cline. Teams building agents or editor plugins that search a codebase repeatedly in a session get the most out of it.