Personally, I'm against anything that goes against the standard LLM data formats of JSON and MD. Any perceived economy is outweighed by confusion when none of these alternative formats exist in the training data in any real sense and every one of them has to be translated (by the LLM) to be used in your code or to apply to your real data.
Any tokens you saved will be lost 3x over in that process, as well as introducing confusing new context information that's unrelated to your app.
Any tokens you saved will be lost 3x over in that process, as well as introducing confusing new context information that's unrelated to your app.