{
  "id": "async_extract_bytes_invalid_mime",
  "category": "async",
  "description": "extract_bytes unsupported MIME async",
  "tags": ["async", "error"],
  "call": "extract_bytes",
  "input": { "data": "text/plain.txt", "mime_type": "application/x-nonexistent", "config": {} },
  "assertions": [{ "type": "error" }]
}