Get Protocol Schema

Return the Universal Cycler Protocol (UCP) authoring guide.

Describes the YAML input format (single-key dicts keyed by step type), the supported step and end-condition forms, runnable example protocols, and a machine-checkable JSON Schema (input_schema) for the authoring format. The JSON Schema is generated from the same enums the parser uses and is parity-tested against validate_protocol_from_dict.