Summary

a custom filter opt is support in multiselect - would be nice to do the same for the autocomplete version 🙏

Motivation

related PR: nuxt/cli#1180

The @clack/core package already supports custom filter functions via the AutocompletePrompt class, but this wasn't exposed in the higher-level @clack/prompts API. This is useful for:

• Implementing fuzzy search (e.g., using fzf library)
• Custom matching logic (prefix-only, regex-based, etc.)
• Searching additional fields beyond label/hint/value

Changes

• Added filter?: (search: string, option: Option<Value>) => boolean to AutocompleteSharedOptions
• Updated autocomplete() and autocompleteMultiselect() to pass through the custom filter, falling back to the default filter when not provided
• Added tests for custom filter functionality

Example Usage

import { autocompleteMultiselect } from '@clack/prompts'
import { Fzf } from 'fzf'

const options = [
  { value: 'apple', label: 'Apple' },
  { value: 'banana', label: 'Banana' },
]

const fzf = new Fzf(options, { selector: (opt) => opt.label })

const result = await autocompleteMultiselect({
  message: 'Select fruits',
  options,
  filter: (search, option) => {
    if (!search) return true
    return fzf.find(search).some((r) => r.item.value === option.value)
  },
})