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/ChannelController.js

@@ -0,0 +1,43 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ChannelController = void 0;
+const schema_js_1 = require("../schema.js");
+const types_js_1 = require("../types.js");
+// None of the fields is required, a channel has one of them at least
+const channel = schema_js_1.s.object({
+    /** "256", "13.1" */
+    number: schema_js_1.s.optional(schema_js_1.s.string()),
+    callSign: schema_js_1.s.optional(schema_js_1.s.string()),
+    affiliateCallSign: schema_js_1.s.optional(schema_js_1.s.string()),
+    uri: schema_js_1.s.optional(schema_js_1.s.string()),
+});
+/**
+ * The channel of a TV. ChangeChannel names the channel by one or more of number, callSign, affiliateCallSign and
+ * uri, or by channelMetadata.name alone. The lineup of a TV provider is not described: the page folds the discovery
+ * example that has one.
+ */
+exports.ChannelController = (0, types_js_1.defineInterface)({
+    namespace: "Alexa.ChannelController",
+    version: "3",
+    doc: "https://developer.amazon.com/docs/alexaplus/device-apis/alexa-channelcontroller.html",
+    kind: "controller",
+    tier: 2,
+    instanced: false,
+    properties: {
+        channel: { name: "channel", value: channel },
+    },
+    directives: {
+        ChangeChannel: {
+            name: "ChangeChannel",
+            payload: schema_js_1.s.object({
+                channel: schema_js_1.s.optional(channel),
+                channelMetadata: schema_js_1.s.optional(schema_js_1.s.object({ name: schema_js_1.s.optional(schema_js_1.s.string()), image: schema_js_1.s.optional(schema_js_1.s.string()) })),
+            }),
+        },
+        SkipChannels: {
+            name: "SkipChannels",
+            payload: schema_js_1.s.object({ channelCount: schema_js_1.s.number({ integer: true }) }),
+            note: "above 0 up, below 0 down",
+        },
+    },
+});