AUP Web-only widget — not a cross-device primitive; not a Web Device layout component.
The name is registered in AUP_WIDGETS (packages/aup/src/aup-types.ts). It can be accepted by structure verification and implemented by a Web runtime (or native target where noted). It is not one of the 18 cross-device AUP_PRIMITIVES, does not enter DeviceCaps.primitives via fillPrimitives, and is not a Web Device theme/site layout component (for example content-card or page-breadcrumb).
Purpose
AFS directory pattern renderer. Resolves a source path server-side, classifies common shapes, and expands into a presentable tree.
Boundaries
- Do not document this type as a portable primitive.
- Do not mix it with Web Device layout-component reference pages under
widgets/. - A parser-accepted name is not a portability or product-readiness claim.
Author entry
AUP / DSL type: "auto-surface". Registered page in showcase auto-surface.
Surfaces
Interactive Web. Client switch maps to renderAupView after expansion.
Fallback
No degradation chain. Expansion failures must be visible (server path).
Evidence
| Source | Path |
|---|---|
| Registration | packages/aup/src/aup-types.ts |
| Registry | providers/runtime/ui/src/aup-registry.ts (auto-surface) |
| Expansion | providers/runtime/ui/src/auto-surface.ts; aup-preview-tree.ts`` |
| Interactive switch | providers/runtime/ui/src/web-page/core.ts case "auto-surface"`` |
| Showcase | blocklets/showcase/.aup/pages/auto-surface.json; app.json route auto-surface`` |
Paths are relative to the Arc repository checkout used for this documentation baseline.
Sample
Internal / experimental for public samples. Registration and renderers exist in the interactive Web runtime (and sometimes Web Device widget packages), but this site does not ship a docs-safe live sample. Do not infer product readiness from the type name alone.
Related
- Widgets hub — navigation only
- Primitive taxonomy — 18 vs 42 boundary
- Custom primitives and Web widgets
- Internal matrix:
docs/aup/capability-matrix.md - Showcase route (local ARC):
auto-surfaceunderblocklets/showcase