Alacritty is a fast, cross-platform, GPU-accelerated terminal emulator written in Rust. It uses OpenGL/GLES for rendering, providing low-latency text display with support for modern terminal features like true color, ligatures, hyperlinks, and a vi-like cursor mode. The architecture is split into multiple crates: `alacritty` (binary with event loop, window management, and rendering), `alacritty_terminal` (reusable library for terminal emulation including grid, cell model, PTY abstraction, and escape sequence parsing), `alacritty_config` (configuration loading and merging), and `alacritty_config_derive` (proc-macro for failure-resistant config deserialization). The terminal core is decoupled from the GUI, making it embeddable in other projects. Configuration is TOML-based with support for imports, live reload, and CLI overrides. The project includes an IPC mechanism for runtime window creation and config updates, and a comprehensive regression test suite using recorded terminal sessions and serialized grid snapshots.