ThreadExtension

Remote counterpart of an in-process run.extensions.<name> projection.

Each extension is the client-side view of a compile-time StreamTransformer projection. The server auto-forwards named StreamChannel.remote(name) outputs on the custom:<name> channel, and this handle exposes them via two dual interfaces:

• AsyncIterable<T> — iterate every item pushed by a streaming transformer (e.g. a StreamChannel).
• PromiseLike<T> — await resolves with the final value observed when the run terminates. For streaming transformers this is the last item pushed; for final-value transformers it is the single value emitted on run end.

Subscribing is lazy: the underlying custom:<name> subscription is opened on first property access and cached.