Add HyperFrames skills

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011h6NB8JQtfPc6eRCefEzBB

.agents/skills/media-use/audio/scripts/heygen-tts.test.mjs

@@ -0,0 +1,38 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import { mkdtempSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const script = fileURLToPath(new URL("./heygen-tts.mjs", import.meta.url));
+// Every fetch answers as HeyGen does for a voice that no longer exists.
+const refusing = `data:text/javascript,globalThis.fetch = async () => new Response(${JSON.stringify(
+  JSON.stringify({ error: { code: "voice_not_found", message: "Voice not found: vc_gone" } }),
+)}, { status: 404, headers: { "content-type": "application/json" } });`;
+
+test("a refused speech prints HeyGen's own message, so a caller can act on it", () => {
+  const dir = mkdtempSync(join(tmpdir(), "heygen-tts-"));
+  const run = spawnSync(
+    process.execPath,
+    ["--import", refusing, script, "Hello", "--voice", "vc_gone", "-o", join(dir, "out.mp3")],
+    {
+      cwd: dir,
+      encoding: "utf8",
+      env: {
+        ...process.env,
+        HEYGEN_API_KEY: "",
+        HYPERFRAMES_API_KEY: "",
+        HEYGEN_ACCESS_TOKEN: "t",
+      },
+    },
+  );
+  assert.equal(run.status, 1);
+  assert.match(run.stderr, /✗ heygen-tts: Voice not found: vc_gone\n/);
+  assert.doesNotMatch(
+    run.stderr,
+    /HTTP 404|"error"/,
+    "HeyGen's message alone, not the raw response",
+  );
+});