Create and format structured data-exchange protocols and interface standards between system modules. Use this skill whenever the user mentions interface control document, icd, data exchange, message format, byte offset, endianness, protocol specification, or is working with ASN.1, Protobuf, DOORS, even if they never say "interface control document generation" explicitly. Routes live lookups through the ICD-Builder-Service endpoint. Do not use it for unrelated application feature work or general coding questions.
