huh-v2

name	huh-v2
description	Build interactive terminal forms and prompts with huh v2 (charm.land/huh/v2): Form/Group/Field composition, Select/MultiSelect/Input/Confirm/Text/FilePicker, embedding forms inside a Bubble Tea v2 model, standalone Run() prompts, theming, and filtering. Use when adding or reviewing any interactive form, picker, wizard, confirm, or approval prompt with this stack. v2's Theme became an interface and forms complete via internal command messages, so lead with the contract and the v1->v2 table - never write from v1 memory.
license	Apache-2.0

Huh v2

Terminal forms for Bubble Tea v2. Import charm.land/huh/v2; pinned to v2.0.3. A Form is a sequence of Groups (one visible at a time); a Group holds Fields. Values bind to your variables via .Value(&x).

The contract: embedding a form in a Bubble Tea model

The canonical in-repo example is internal/presentation/tui/components/init_github_action_view.go. Hold a *huh.Form, delegate Update, type-assert the returned model, switch on form.State, and rebuild + Init() a fresh form per phase:

type wizard struct {
    form *huh.Form
    name string
}

func (w *wizard) buildForm() *huh.Form {
    return huh.NewForm(
        huh.NewGroup(
            huh.NewInput().Title("Name").Validate(notEmpty).Value(&w.name),
        ),
    ).WithWidth(w.width).WithTheme(huhTheme(w.styleProvider))
}

func (w *wizard) Init() tea.Cmd { return w.form.Init() }

func (w *wizard) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
    form, cmd := w.form.Update(msg)
    if f, ok := form.(*huh.Form); ok {
        w.form = f
    }
    switch w.form.State {
    case huh.StateCompleted: // bound values are now set
        return w, w.advance() // next phase: rebuild form, return form.Init()
    case huh.StateAborted:   // quit key pressed (ctrl+c by default)
        return w, tea.Quit
    }
    return w, cmd
}

func (w *wizard) View() tea.View { return tea.NewView(w.form.View()) }

Every message must reach the form. Enter/next/submit work through huh's internal command messages (nextFieldMsg, nextGroupMsg): the field returns a cmd, the runtime executes it, and the resulting message must be routed back into form.Update or the form stalls one step before completion. This is automatic when the form's owner is the top-level model; when the form floats inside a larger app (see question_form_view.go + forwardToOverlayForms in internal/presentation/tui/app/chat.go), forward non-key messages explicitly. The same applies to tests: pump returned cmds back through the form instead of asserting after a single Update call.

v2 vs the v1 you remember

Topic	v1	v2
Import	github.com/charmbracelet/huh	charm.land/huh/v2
Theme	struct	interface Theme(isDark bool) *Styles; adapt funcs with huh.ThemeFunc
Built-in themes	huh.ThemeCharm() returns *Theme	huh.ThemeCharm(isDark bool) *Styles (same for Dracula/Catppuccin/Base/Base16)
Accessible mode	per-field WithAccessible	form-level only: Form.WithAccessible(true); field methods removed
Bubble Tea types	v1 tea.Cmd/tea.Msg	charm.land/bubbletea/v2 throughout
Styling types	Lip Gloss v1	Lip Gloss v2 (see lipgloss-v2)
Button alignment	v1 lipgloss.Position	v2 lipgloss.Position
Form model	unexported	huh.Model exported; Form.View() returns string

Fields you'll reach for

Field	Purpose	Must-know
Input	one-line text	.Validate(func(string) error), .Placeholder
Text	multi-line text	.Lines(n)
Select[T]	pick one	generic over the value type; .Height(n) viewport; / filter built in; .Inline(true) = one-line ←/→ carousel; .OptionsFunc for dynamic options; .GetFiltering()
MultiSelect[T]	pick many	toggle with space/x; .Validate for "at least one"
Confirm	yes/no	.Affirmative("Yes") / .Negative("No")
FilePicker	pick a file	.CurrentDirectory, .AllowedTypes([]string{".pem"}), .Height
Note	static text	display-only card

Options carry a display key and a typed value: huh.NewOption("label", value). huh.NewOptions("a", "b") when key == value.

Best practices & gotchas

• Forms are one-shot. After StateCompleted/StateAborted a form is done; build a new one (and run its Init()) to show it again. Reset bound variables when rebuilding - they keep their last values.
• Quit is ctrl+c only by default; esc does NOT abort. Rebind when needed: km := huh.NewDefaultKeyMap(); km.Quit = key.NewBinding(key.WithKeys("esc")) then .WithKeyMap(km). Beware: form-level Quit wins over field keys, so binding esc to Quit breaks Select's esc-clears-filter.
• Enter is both next-field and submit in the default keymap; the last group's completion submits the form.
• Select's / filter is substring, not fuzzy, and matches option.Key - including any suffix text you baked into the label.
• Conditional groups: huh.NewGroup(...).WithHideFunc(func() bool) - evaluated live, the standard trick for "show this input only when X chosen" (see the private-key fallbacks in init_github_action_view.go).
• Theming: this repo maps the active style-provider palette via huhTheme(styleProvider) in internal/presentation/tui/components/huh_theme.go - use it on every form (.WithTheme(huhTheme(p))). The theme is captured at build time; the rebuild-per-phase pattern picks up theme switches for free.
• Plain-terminal prompts (outside any Bubble Tea program): call Run() directly - huh.NewConfirm().Title("Proceed?").Value(&ok).Run() runs its own mini program (see confirmInstall in cmd/plugins.go). Guard for non-interactive stdin first.
• Sizing: overlay forms never see tea.WindowSizeMsg; set .WithWidth from your component's own width at build time.

Pairs with bubbletea-v2 (the runtime), bubbles-v2 (components), and lipgloss-v2 (styling). Pinned to huh v2.0.3.