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
Built-in create/edit surface for posts collections (title+body form, modal compose, server PostsHandler).
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 type: "post-editor" with props.mode and props.postSource. Write path — not a read-only docs sample.
Surfaces
Interactive Web session with posts backend.
Fallback
No degradation chain. Requires auth and collection permissions.
Evidence
| Source | Path |
|---|---|
| Registration | packages/aup/src/aup-types.ts |
| Renderer | providers/runtime/ui/src/web-page/renderers/post-editor.ts |
| Interactive switch | providers/runtime/ui/src/web-page/core.ts case "post-editor"`` |
| Handler | providers/runtime/ui/src/posts-handler.ts |
Paths are relative to the Arc repository checkout used for this documentation baseline.
Sample
Not docs-safe. Side effects, write paths, native-only surfaces, or trust-sensitive endpoints make a public sample inappropriate. Keep this page as a boundary and evidence index.
Related
- Widgets hub — navigation only
- Primitive taxonomy — 18 vs 42 boundary
- Custom primitives and Web widgets
- Internal matrix:
docs/aup/capability-matrix.md