Provides a generic file tree view model that supports flat and tree display modes, text filtering, directory collapsing, and selection preservation across tree rebuilds. It is self-contained, depends only on internal node types, and can be extracted for any hierarchical file listing UI.

Implements patch transformations for partial selections, reverse application, and rename stripping. The logic is isolated from the GUI and operates on parsed patch hunks, making it reusable for any tool that needs to manipulate Git diffs programmatically.

An async handler that ensures only the latest result from a sequence of asynchronous operations is processed, canceling previous ones. It is generic, thread-safe, and can be reused in any Go application requiring debounced or cancellable background tasks.

A generic thread-safe map implementation using sync.RWMutex. It provides Get, Set, Delete, and iteration methods. This is a straightforward but well-crafted utility that can be extracted for any concurrent data sharing need.

A generic list view model with cursor management, range selection, and sticky selection. It is used across multiple list contexts in lazygit and can be reused in any terminal UI that needs list navigation with keyboard-driven selection.

A comprehensive integration test driver that simulates user interactions (key presses, mouse events, view navigation) against the lazygit TUI. It provides fluent assertion helpers (Contains, Equals, IsSelected) and supports headless execution. This framework is reusable for testing any terminal UI built on gocui or similar libraries.

A fluent builder for constructing Git command arguments with conditional flags, logging, and credential strategies. It abstracts away the complexity of building correct Git CLI invocations and can be reused in any Go application that needs to execute Git commands programmatically.

Implements auto-scrolling during mouse drag operations with configurable speed zones. It is self-contained and can be reused in any TUI that supports mouse-based drag interactions for list or text views.

Derives consistent, visually distinct colors for Git authors using HSLuv color space and a hash of the author name. It adapts to light/dark terminal backgrounds and can be reused in any application that needs to assign stable colors to arbitrary strings.

A fully self-contained Snake game implementation with grid, collision detection, and scoring. It is a fun easter egg embedded in lazygit but demonstrates clean game loop architecture and can be extracted as a standalone terminal game.