Switch iTerm2 color presets automatically when entering directories — no profile switching, just color presets. Works with any preset visible in Settings → Profiles → Colors → Color Presets.
• iterm_theme "Name" in .envrc exports ITERM_THEME via direnv • A precmd hook in zsh sends iTerm2's proprietary escape code SetColors=preset= on every prompt • When you leave the directory, direnv unsets ITERM_THEME and the hook