schema: ai-cjm-component-contract/v1
id: breadcrumbs
version: 2.0.0
status: stable
owner: AI CJM Design
purpose: Показывает место detail-страницы в архитектуре и даёт короткий путь назад.
use_when:
- Detail-страница вложена в каталог, профиль или редакционный раздел.
evidence:
- id: production-style
  url: https://aicjm.ru/edu/cases/case.css?v=20260811-card-source
  locator: .case-breadcrumb, .case-breadcrumb a, .case-breadcrumb span
  supports:
  - anatomy
  - variant:default
  - size:default
  - state:default
- id: production-dom
  url: https://aicjm.ru/edu/cases/ozon/
  locator: .case-hero .case-breadcrumb
  supports:
  - approved-example
  - content
anatomy:
- id: parent
  required: true
  role: Ссылка на родительский каталог.
- id: separator
  required: true
  role: Нейтральный разделитель.
- id: current
  required: true
  role: Текущий объект без лишней ссылки.
variants:
- id: default
  status: stable
  description: Каноническая композиция v2.
  evidence_refs:
  - production-style
sizes:
- id: default
  status: stable
  description: Размер следует токенам и содержимому без локальных чисел.
  evidence_refs:
  - production-style
states:
  default:
    status: stable
    basis: observed
    description: breadcrumbs default is observed at the exact production locator.
    evidence_refs:
    - production-style
  hover:
    status: not-applicable
    basis: not-applicable
    description: hover is not owned by breadcrumbs.
  focus-visible:
    status: not-applicable
    basis: not-applicable
    description: focus-visible is not owned by breadcrumbs.
  active:
    status: not-applicable
    basis: not-applicable
    description: active is not owned by breadcrumbs.
  selected:
    status: not-applicable
    basis: not-applicable
    description: selected is not owned by breadcrumbs.
  open:
    status: not-applicable
    basis: not-applicable
    description: open is not owned by breadcrumbs.
  disabled:
    status: not-applicable
    basis: not-applicable
    description: disabled is not owned by breadcrumbs.
  loading:
    status: not-applicable
    basis: not-applicable
    description: loading is not owned by breadcrumbs.
  success:
    status: not-applicable
    basis: not-applicable
    description: success is not owned by breadcrumbs.
  error:
    status: not-applicable
    basis: not-applicable
    description: error is not owned by breadcrumbs.
  empty:
    status: not-applicable
    basis: not-applicable
    description: empty is not owned by breadcrumbs.
responsive:
  mode: single-line-scroll-safe-breadcrumb
  reading_order: 'breadcrumbs: DOM order remains authoritative at every viewport.'
  rules:
  - Preserve breadcrumbs anatomy and primary action in one reading sequence.
  - Wrap text without horizontal page overflow and preserve evidence labels.
accessibility:
  pattern: hierarchy-navigation
  semantics:
  - Expose breadcrumbs as the nearest correct native landmark, article or control.
  keyboard:
  - Tab reaches real actions in DOM order; Enter or Space follows the native control contract.
  focus:
  - Interactive descendants use focus.ring and preserve a visible label.
  motion:
  - Reduced motion removes nonessential transitions without hiding state or evidence.
tokens:
- text.secondary
- action.primary
- type.size.metadata
- focus.ring
content:
  required:
  - Ссылка на родительский каталог.
  - Нейтральный разделитель.
  - Текущий объект без лишней ссылки.
  constraints:
  - Сохранять один понятный родительский маршрут.
  - Каждый факт и asset сохраняет provenance.
do:
- Сохранять один понятный родительский маршрут.
dont:
- Не превращать breadcrumbs в копию основной навигации.
examples:
  approved:
    status: stable
    description: Live breadcrumbs at the scoped production locator.
    evidence: https://aicjm.ru/edu/cases/ozon/
  prohibited:
    description: Не превращать breadcrumbs в копию основной навигации.
acceptance:
- id: breadcrumbs-1
  criterion: Все обязательные anatomy parts присутствуют в DOM и видимы.
  method: automated-and-manual
- id: breadcrumbs-2
  criterion: На mobile сохраняются reading order, target size и отсутствие overflow.
  method: browser