pqForgeHybridKexMetadataKey top-level constant

String const pqForgeHybridKexMetadataKey

Metadata key whose presence marks an envelope/container as hybrid (ML-KEM + classical) KEM-DEM. The canonical constant lives here so both the sync service (which must reject hybrid inputs with a clear error) and the async/streaming hybrid paths share it without an import cycle.

Implementation

const pqForgeHybridKexMetadataKey = 'hybridKex';