Module arch 

Model architecture trait and variant enum.

The ModelArch trait defines how a model architecture composes Driver primitives into a complete forward pass (embeddings -> encoder layers -> pooling -> normalization).

Each architecture (ClassicBert, ModernBert) is implemented once and works with any driver backend via generics.

Modules

classic_bert

ClassicBert architecture (BGE-small-en-v1.5).

modern_bert

ModernBERT architecture (nomic-ai/modernbert-embed-base).

Enums

ArchVariant

Supported model architectures.

Traits

ModelArch

Model architecture that composes Driver primitives into a forward pass.