transformer_lens.model_bridge.supported_architectures.marian module

Marian architecture adapter.

Helsinki-NLP’s opus-mt family (MarianMTModel): post-norm Bart layout with no layernorm_embedding and no per-stack final norms, deterministic sinusoidal positions, and the sqrt(d_model) embedding scale applied in the stack forward (embed hooks observe unscaled output). A trained final_logits_bias is added after lm_head inside HF’s forward.

class transformer_lens.model_bridge.supported_architectures.marian.MarianArchitectureAdapter(cfg: Any)

Bases: BartFamilyArchitectureAdapter

Architecture adapter for MarianMTModel models (Helsinki-NLP opus-mt family).