feat(prompts): add custom filter option to autocomplete

[danielroe]

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)
  },
})

[changeset-bot]

🦋 Changeset detected

Latest commit: 73af0a8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@clack/prompts	Minor

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[43081j]

makes sense to me 👍

can you add a changeset? (npx changeset)

[danielroe]

done! ❤️

[pkg-pr-new]

• @example/basic

• @example/changesets

  npm i https://pkg.pr.new/bombshell-dev/clack/@clack/core@444
  

  npm i https://pkg.pr.new/bombshell-dev/clack/@clack/prompts@444
  

commit: 73af0a8