A comprehensive Go CLI framework that provides declarative option definitions, automatic completion (bash, zsh, fish), subcommand grouping, help generation with man page support, and markup prettification. It is self-contained and can be reused in any Go command-line application for building type-safe, feature-rich interfaces.

A Go TUI event loop that abstracts terminal input (keyboard, mouse, resize), escape sequence parsing, and graphics protocol. It supports raw mode, timers, asynchronous writes, and terminal state management. Fully reusable for building terminal user interfaces in Go, demonstrating clean separation of concerns and robust error handling.

A streaming base64 encoder and decoder in Go that processes data in chunks, making it suitable for large payloads without requiring full buffering. Provides both standard and URL-safe alphabets, and is designed for use in terminal file transfer and other high-throughput scenarios. Easily extracted and used in any Go project.

A Go implementation of the rsync delta algorithm, providing block-level signature generation, difference computation, and patching. Used by kitty's file transfer kitten for efficient remote file updates. The API is clean and generic, with rolling checksums and strong hashing, and can be reused in any Go project requiring incremental synchronization.

A Go implementation of the fuzzy matching algorithm used in fzf (fzf), employing a Smith-Waterman-like scoring system with bonuses for camelCase, word boundaries, and delimiter separators. It includes configurable schemes for paths, history, and default matching. Self-contained and easily integrated into any Go application for fast, ranked substring matching.