registry: Speaker, StepSpeaker, EqualizerController, PlaybackController, PlaybackStateReporter, InputController, ChannelController

Seven descriptors written from their pages replace seven stubs. All are version 3; 1.5.2 announced Speaker,
StepSpeaker, EqualizerController and PlaybackStateReporter as version 1, and all but ChannelController without
a property. StepSpeaker has no properties object in discovery and PlaybackController one without fields, next
to supportedOperations; a directive for an operation the device did not list is answered with
INVALID_DIRECTIVE. The equalizer declares bands, modes or both under "configurations", a TV its inputs from
the 61 names of the page.

Not described: the lineup of ChannelController, whose discovery example the page folds away. The discovery
examples of InputController spell one key "friendNames"; the fixtures have friendlyNames, as its table does.
62 examples of the six pages are saved as fixtures. 241 tests pass, 215 before.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

dist/cjs/registry/interfaces/PlaybackStateReporter.js

@@ -0,0 +1,18 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.PlaybackStateReporter = void 0;
+const schema_js_1 = require("../schema.js");
+const types_js_1 = require("../types.js");
+/** What a player is doing, for an endpoint with Alexa.PlaybackController. Documented on the page of that interface. */
+exports.PlaybackStateReporter = (0, types_js_1.defineInterface)({
+    namespace: "Alexa.PlaybackStateReporter",
+    version: "3",
+    doc: "https://developer.amazon.com/docs/alexaplus/device-apis/alexa-playbackcontroller.html",
+    kind: "sensor",
+    tier: 2,
+    instanced: false,
+    properties: {
+        playbackState: { name: "playbackState", value: schema_js_1.s.object({ state: schema_js_1.s.enum("PLAYING", "PAUSED", "STOPPED") }) },
+    },
+    directives: {},
+});