rtc is an AUP cross-device primitive, not a Web Device layout component and not a Web-only widget. It is one of the 18 names in AUP_PRIMITIVES and appears in every target's DeviceCaps.primitives map as native, webview, partial, or unsupported.
Contract
| Field | Value |
|---|---|
| Primitive name | rtc |
| Layer | AUP cross-device primitive (AUP_PRIMITIVES) |
| Public status | unsupported |
| Document capability | unsupported |
| Shared degradation chain | rtc → unsupported |
| Author entry | AUP on targets with realtime media capability |
| Document renderer / notes | Not on document RENDERERS as a native path |
| Showcase evidence | Not a document sample; interactive runtime only |
When to use
Realtime audio/video collaboration on a device that grants media permissions.
When not to use
Never claim RTC from static documentation. Chain has no useful document fallback.
Document sample
Not provided. Shared chain: rtc → unsupported (explicit). Static docs must not simulate camera/mic UI as product capability.
Evidence anchors
| Item | Value |
|---|---|
| Registry | packages/aup/src/aup-types.ts · AUP_PRIMITIVES |
| Document caps | providers/runtime/web-device/src/device-caps.ts · DEVICE_CAPS_DOCUMENT |
| Degradation | packages/aup/src/degradation.ts · DEGRADATION_CHAINS |
| Internal matrix | docs/aup/capability-matrix.md (internal, non-routed) |
| Taxonomy hub | Primitive taxonomy and evidence |
| Sample contract rules | Live examples: scope and contract |