1. Download the sherpa-onnx runtime for your operating system.
2. Download a voice model from the sherpa-onnx tts-models release.
3. Configure the `SHERPA_ONNX_RUNTIME_DIR` and `SHERPA_ONNX_MODEL_DIR` environment variables in your `openclaw.json` file.
4. Add the skill's `bin` directory to your system's PATH.
5. Execute the `sherpa-onnx-tts` command with the desired text and output file path.
6. Verify the generated audio file.