Native DOM receiver; receiver seam; mount knobs for benchmarking

receiver/src/frames.ts

@@ -357,11 +357,18 @@ function decodeTemplateNode(r: Reader): TemplateNode {
 export class FrameDecoder {
   #sink: FrameSink;
   #pending: Uint8Array = new Uint8Array(0);
+  /** Frame messages decoded so far, whether or not they carried an op —
+   * a benchmark harness's `Mounted.stats.frames` (mount.ts). */
+  #frameCount = 0;
 
   constructor(sink: FrameSink) {
     this.#sink = sink;
   }
 
+  get frameCount(): number {
+    return this.#frameCount;
+  }
+
   /** Append a chunk and decode every complete frame now available. The
    * decoder copies what it keeps (the concatenation below), so the caller
    * may reuse or discard `chunk` immediately after this returns. */
@@ -404,6 +411,7 @@ export class FrameDecoder {
   }
 
   #decodeFrame(r: Reader): void {
+    this.#frameCount++;
     let commit = false;
     let sawAnyOpField = false;
     let dispatch: (() => void) | undefined;

receiver/src/mod.ts

@@ -11,7 +11,11 @@ export type {
   TemplateElement,
   TemplateNode,
 } from "./frames.ts";
-export { RemoteDomTranscoder } from "./remote.ts";
+export { ListenerRegistry } from "./receiver.ts";
+export type { Receiver } from "./receiver.ts";
+export { validateTemplateArena } from "./templates.ts";
+export { createRemoteReceiver, RemoteDomTranscoder } from "./remote.ts";
+export { NativeDomReceiver } from "./native.ts";
 export { encodePayload } from "./events.ts";
 export { DispatchGate } from "./dispatch.ts";
 export { mount } from "./mount.ts";