Capability examples

These examples teach one boundary at a time. They are authored tutorial code, not SDK implementation source. They target SDK 0.4.0; execution requires an approved SDK wheel and compatible host.

Example	You learn	Execution scope
Managed echo	Descriptor, startup, health, correlated results and shutdown	Complete child entrypoint; host supplies startup and signed manifest
Duplex echo	Input half-close, output sequencing and cleanup	Handler to integrate into a protocol-4 child
Operation identity	Canonical intent and safe retry identity	Direct SDK function example
In-process echo	Skulk™ extension registration and Fabric calls	Separate in-process authoring path
Video Studio	A full application with durable jobs and a UI	Guided walkthrough of the implemented integration

Start with managed echo. Add streaming only when your operation needs it, and durable work only when an invocation cannot own the whole lifecycle. Examples deliberately identify what is complete and what still needs an application-owned integration.