//! End-to-end example Programs that chain the C11 lex / preprocess
//! / parse stages. Fixtures for integration tests and grammar-gen
//! consumers; not a Cat-A op itself.
/// Content-keyed source pipeline cache.
/// Named GPU stages for embedders (`c11_lexer`, preprocess, …).
/// Megakernel sketch and inventory registration for the full C11 pipeline narrative.