Write interactive shell scripts with the gum CLI (Charm, charmbracelet): choose, filter, confirm, input, write, file, spin, table, pager, style, join, format, and log, with their flags, exit codes, environment variable defaults, and Bash examples. Use when a Bash or shell script needs a prompt, menu, picker, fuzzy finder, yes or no question, text input, spinner, CSV table, pager, styled output with borders and terminal colors, rendered Markdown, or log lines, without writing Go. Not for Go programs (charmed-huh, charmed-bubbletea).