grug-far.nvim is a Neovim plugin providing an interactive find-and-replace workflow using ripgrep and ast-grep as search backends. It presents a dedicated buffer with editable input fields (search pattern, replacement, files filter, flags, paths) and renders results with highlighting, folding, and line-level diff markers. The plugin supports multiple search engines and replacement interpreters (Lua, Vimscript), history persistence, preview, quickfix integration, and instance-level API for programmatic control. The architecture is modular: an engine abstraction layer, async job processing with libuv, a rendering system using Neovim extmarks, and a task lifecycle manager. It includes a comprehensive screenshot-based test suite and CI workflows. The codebase demonstrates strong software craftsmanship with clean abstractions, reusable patterns, and extensive documentation.