Build terminal user interfaces (TUI) in Go with Bubble Tea v2 (charm.land/bubbletea/v2, the charmbracelet bubbletea framework) using the Elm architecture Model, Update, View loop, commands for I/O, and declarative tea.View fields for alt screen, mouse, cursor, and title. Use when writing or migrating a Bubble Tea or bubbletea app, handling tea.KeyPressMsg or mouse messages, wiring async work into a TUI, or testing one. Not for ready made widgets (charmed-bubbles), styling (charmed-lipgloss), or forms (charmed-huh).