feat: add fal and OpenRouter music generation (#82789)

* feat: add fal and OpenRouter music generation

* fix: repair music generation CI gates

* chore: refresh proof gate

src/plugin-sdk/index.ts

@@ -103,7 +103,7 @@ export type {
 } from "../plugins/memory-state.js";
 export type { CliBackendConfig } from "../config/types.js";
 export type * from "./image-generation.js";
-export * from "./music-generation.js";
+export type * from "./music-generation.js";
 export type { SecretInput, SecretRef } from "../config/types.secrets.js";
 export type { RuntimeEnv } from "../runtime.js";
 export type { HookEntry } from "../hooks/types.js";

src/plugin-sdk/music-generation.ts

@@ -12,3 +12,9 @@ export type {
   MusicGenerationSourceImage,
   MusicGenerationOutputFormat,
 } from "../music-generation/types.js";
+export {
+  downloadGeneratedMusicAsset,
+  extractGeneratedMusicFileCandidates,
+  generatedMusicAssetFromBase64,
+  type GeneratedMusicFileCandidate,
+} from "../music-generation/provider-assets.js";

src/plugin-sdk/test-helpers/plugin-registration-contract-cases.ts

@@ -44,6 +44,7 @@ export const pluginRegistrationContractCases = {
     pluginId: "fal",
     providerIds: ["fal"],
     imageGenerationProviderIds: ["fal"],
+    musicGenerationProviderIds: ["fal"],
   },
   firecrawl: {
     pluginId: "firecrawl",
@@ -115,6 +116,7 @@ export const pluginRegistrationContractCases = {
     providerIds: ["openrouter"],
     mediaUnderstandingProviderIds: ["openrouter"],
     imageGenerationProviderIds: ["openrouter"],
+    musicGenerationProviderIds: ["openrouter"],
     videoGenerationProviderIds: ["openrouter"],
     requireDescribeImages: true,
     requireGenerateImage: true,