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Syntax Hints

A palette with prefix syntax where an empty result answers with a legend of the symbols instead of a bare "nothing found" line.

  • command
  • syntax
  • empty-state
  • palette

Preview

1440pxHost theme

Use it with AI

  1. 1. Copy the link.
  2. 2. Write to your agent in your own words and drop the link into the sentence.
  3. 3. The agent opens the link and installs the component from the registry.

put this in the header: https://vibeui.ru/c/command-007?lang=en

  • Пересобрать реестр
  • Проверить metadata
  • Очистить кеш превью
Show the full instructions

What the link says, spelled out. Use it when your agent cannot open links — paste this text instead.

# Install and place "command-007" (Syntax Hints) from VibeUI

## 1. Install first — do not skip, do not recreate
Run this exact command before writing any code:
npx shadcn@latest add https://vibeui.ru/r/command-007.json

Registry item: https://vibeui.ru/r/command-007.json
Installs to: components/vibeui/command-007.tsx (the exact path follows this project's components.json aliases).
npm dependencies: none.
Registry dependencies: none.

Install it from the registry. Do not recreate it from the description,
do not substitute a similar component from another library, and do not
rewrite it to match the project's existing style.

## 2. What it is
A palette with prefix syntax where an empty result answers with a legend of the symbols instead of a bare "nothing found" line.

A palette with prefix modes > @ #: a mode chip at the field, filtering inside the mode and a syntax legend in place of an empty list. Zero dependencies, one file.

## 3. How to use it
import { Command007 } from "@/components/vibeui/command-007"

<Command007 entries={[{ label: "Rebuild registry", mode: ">" }]} />

Read the installed file for the full prop list.

## 4. Where to place it
This is a small inline component. Put it exactly where the user asked,
inside the existing markup. Do not create a new page, section or
wrapper for it. If a similar control already sits in that spot,
replace it instead of adding a second one.

Placement: ___
(The user fills this line in. If it is still blank, ask where to put it
instead of guessing.)

## 5. Keep exactly as installed
- the local --vibeui-command-007-* palette — do not swap it for your theme tokens
- the legend instead of a "nothing found" line: an empty list is where the user got stuck
- the mode chip at the field: without it the list swap looks random
- parsing the mode from the first character — that keeps the syntax predictable
- the monospaced prefixes: they are typed character by character
- the role=combobox plus aria-activedescendant pairing: focus stays in the field

## 6. You may change
- the entries array and the set of prefixes
- the field hint through the placeholder prop
- the wording of the syntax legend
- the accent through the accent prop

## 7. Rules
- There are exactly three modes: a new prefix must be added to both the parser and the legend, or the list stays empty.
- A query with no prefix deliberately searches nothing — that is what teaches the syntax.
- Enter on a row runs nothing: wire your own handler per mode.
- Do not lift the CSS variables into globals.css: the component has to stay a single file.

## 8. Verify
- it renders with no console errors;
- it looks like the preview on the VibeUI page you copied this from;
- if it does not, you changed something listed in section 5 — put it back.

For developers

npx shadcn@latest add https://vibeui.ru/r/command-007.json
https://vibeui.ru/r/command-007.json

Компонент самодостаточен: один файл, без зависимостей, собственная палитра в локальных переменных --vibeui-command-007-*. Клиентский: "use client" ради разбора запроса. Первый символ запроса определяет режим: > команды, @ символы, # строки; он же показывается чипом слева от поля, поэтому связь «набрал префикс — сменился список» очевидна. Пустой результат заменён легендой префиксов: список без строк — это место, где пользователь застрял, и подсказка там полезнее сообщения об отсутствии совпадений. Роли combobox, listbox и option объявлены явно.

Component source

The same file your agent installs. Here in case you would rather copy it by hand.

"use client"

import { useId, useState } from "react"
import type {
  ComponentPropsWithoutRef,
  CSSProperties,
  KeyboardEvent,
} from "react"

export type Command007Entry = {
  label: string
  mode: ">" | "@" | "#"
}

export type Command007Props = Omit<
  ComponentPropsWithoutRef<"div">,
  "children"
> & {
  entries?: Command007Entry[]
  placeholder?: string
  accent?: string
}

// Идея компонента: палитра с синтаксисом префиксов и честным пустым
// состоянием. Пустой список — это место, где пользователь застрял, поэтому
// вместо строчки «ничего не найдено» здесь показывается легенда: > команды,
// @ символы, # строки. Режим определяется первым символом запроса и виден
// чипом слева от поля, так что связь «набрал > — сменился список» очевидна.
const STYLES = `
:where([data-vibeui-block="command-007"]){
--vibeui-command-007-bg:oklch(1 0 0);
--vibeui-command-007-fg:oklch(0.23 0.014 265);
--vibeui-command-007-muted:oklch(0.57 0.014 265);
--vibeui-command-007-border:oklch(0.9 0.006 265);
--vibeui-command-007-accent:oklch(0.62 0.16 55);
--vibeui-command-007-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
--vibeui-command-007-font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
[data-vibeui-block="command-007"]{
display:block;box-sizing:border-box;width:100%;max-width:24rem;overflow:hidden;
background:var(--vibeui-command-007-bg);color:var(--vibeui-command-007-fg);
border:1px solid var(--vibeui-command-007-border);border-radius:0.875rem;
box-shadow:0 18px 40px -28px oklch(0.2 0.03 265 / 60%);
font-family:var(--vibeui-command-007-font);
}
[data-vibeui-block="command-007"] [data-part="field"]{
display:flex;align-items:center;gap:0.5rem;
padding:0 0.75rem;border-bottom:1px solid var(--vibeui-command-007-border);
}
[data-vibeui-block="command-007"] [data-part="chip"]{
flex:none;padding:0.125rem 0.4375rem;border-radius:0.4375rem;
background:color-mix(in oklab,var(--vibeui-command-007-accent) 18%,transparent);
color:oklch(0.48 0.14 55);
font-family:var(--vibeui-command-007-mono);font-size:0.6875rem;font-weight:700;
}
[data-vibeui-block="command-007"] input{
flex:1;min-width:0;height:2.875rem;
appearance:none;border:0;background:none;color:inherit;
font:inherit;font-size:0.9375rem;outline:none;
}
[data-vibeui-block="command-007"] [data-part="field"]:focus-within{box-shadow:inset 0 -2px 0 0 var(--vibeui-command-007-accent)}
[data-vibeui-block="command-007"] [data-part="list"]{
list-style:none;margin:0;padding:0.3125rem;max-height:14rem;overflow-y:auto;
}
[data-vibeui-block="command-007"] [data-part="row"]{
display:flex;align-items:center;gap:0.625rem;
padding:0.4375rem 0.5625rem;border-radius:0.5rem;cursor:pointer;font-size:0.875rem;
}
[data-vibeui-block="command-007"] [data-part="row"]:hover,
[data-vibeui-block="command-007"] [data-part="row"][aria-selected="true"]{
background:color-mix(in oklab,var(--vibeui-command-007-accent) 14%,transparent);
}
[data-vibeui-block="command-007"] [data-part="sigil"]{
flex:none;width:1rem;text-align:center;
font-family:var(--vibeui-command-007-mono);color:var(--vibeui-command-007-muted);
}
/* Пустой ответ — это подсказка синтаксиса, а не строчка «ничего не найдено». */
[data-vibeui-block="command-007"] [data-part="hints"]{
list-style:none;margin:0;padding:0.875rem;
display:flex;flex-direction:column;gap:0.5rem;
}
[data-vibeui-block="command-007"] [data-part="hints"] li{
display:flex;align-items:baseline;gap:0.625rem;
font-size:0.8125rem;color:var(--vibeui-command-007-muted);
}
[data-vibeui-block="command-007"] [data-part="hints"] code{
flex:none;min-width:1.5rem;padding:0.0625rem 0.375rem;border-radius:0.375rem;
background:oklch(0.55 0.02 265 / 10%);color:var(--vibeui-command-007-fg);
font-family:var(--vibeui-command-007-mono);font-size:0.75rem;font-weight:700;
}
[data-vibeui-block="command-007"] [data-part="lead"]{
margin:0;padding:0.875rem 0.875rem 0;font-size:0.8125rem;color:var(--vibeui-command-007-fg);
}
@media (prefers-reduced-motion:reduce){[data-vibeui-block="command-007"] *{animation:none!important;transition:none!important}}
`

const DEFAULT_ENTRIES: Command007Entry[] = [
  { label: "Пересобрать реестр", mode: ">" },
  { label: "Проверить metadata", mode: ">" },
  { label: "Очистить кеш превью", mode: ">" },
  { label: "validateSource", mode: "@" },
  { label: "buildIndexes", mode: "@" },
  { label: "pascalCase", mode: "@" },
  { label: "Строка 128", mode: "#" },
  { label: "Строка 214", mode: "#" },
]

const HINTS: Array<{ sigil: string; text: string }> = [
  { sigil: ">", text: "команды приложения" },
  { sigil: "@", text: "символы в открытом файле" },
  { sigil: "#", text: "переход к строке" },
]

/**
 * Палитра с префиксным синтаксисом и подсказкой вместо пустого списка.
 * Один файл, ноль зависимостей.
 */
export function Command007({
  entries = DEFAULT_ENTRIES,
  placeholder = "Введите > @ или #",
  accent,
  className,
  style,
  ...props
}: Command007Props) {
  const [query, setQuery] = useState(">")
  const [active, setActive] = useState(0)
  const listId = useId()
  const rowId = useId()

  const sigil = [">", "@", "#"].includes(query.charAt(0))
    ? (query.charAt(0) as Command007Entry["mode"])
    : null
  const needle = (sigil ? query.slice(1) : query).trim().toLowerCase()
  const rows = sigil
    ? entries.filter(
        (entry) =>
          entry.mode === sigil && entry.label.toLowerCase().includes(needle),
      )
    : []
  const current = rows[Math.min(active, rows.length - 1)]

  const onKeyDown = (event: KeyboardEvent<HTMLInputElement>) => {
    if (event.key === "ArrowDown" || event.key === "ArrowUp") {
      event.preventDefault()
      if (rows.length === 0) return
      const step = event.key === "ArrowDown" ? 1 : -1
      setActive((index) => (index + step + rows.length) % rows.length)
      return
    }

    if (event.key === "Escape") {
      event.preventDefault()
      setQuery("")
      setActive(0)
    }
  }

  const paletteStyle = {
    ...(accent ? { "--vibeui-command-007-accent": accent } : null),
    ...style,
  } as CSSProperties

  return (
    <>
      <style href="vibeui-command-007" precedence="medium">
        {STYLES}
      </style>
      <div
        {...props}
        data-vibeui-block="command-007"
        className={className}
        style={paletteStyle}
        role="dialog"
        aria-label="Командная палитра с синтаксисом"
      >
        <div data-part="field">
          {sigil ? (
            <span data-part="chip" aria-hidden="true">
              {sigil}
            </span>
          ) : null}
          <input
            type="text"
            role="combobox"
            aria-expanded={rows.length > 0}
            aria-controls={listId}
            aria-autocomplete="list"
            aria-activedescendant={
              current ? `${rowId}-${rows.indexOf(current)}` : undefined
            }
            aria-label={placeholder}
            placeholder={placeholder}
            value={query}
            onChange={(event) => {
              setQuery(event.target.value)
              setActive(0)
            }}
            onKeyDown={onKeyDown}
          />
        </div>
        {rows.length === 0 ? (
          <>
            <p data-part="lead">
              {sigil
                ? "Ничего не нашлось. Проверьте префикс:"
                : "Начните с префикса:"}
            </p>
            <ul data-part="hints">
              {HINTS.map((hint) => (
                <li key={hint.sigil}>
                  <code>{hint.sigil}</code>
                  {hint.text}
                </li>
              ))}
            </ul>
          </>
        ) : (
          <ul
            id={listId}
            data-part="list"
            role="listbox"
            aria-label="Результаты"
          >
            {rows.map((entry, index) => (
              <li
                key={`${entry.mode}-${entry.label}`}
                id={`${rowId}-${index}`}
                data-part="row"
                role="option"
                aria-selected={current === entry}
                onClick={() => setActive(index)}
              >
                <span data-part="sigil" aria-hidden="true">
                  {entry.mode}
                </span>
                {entry.label}
              </li>
            ))}
          </ul>
        )}
      </div>
    </>
  )
}