Bertographer

Mechanistic cockpit for encoder classifiers — per-head logit-lens · per-head class votes · vocab/class rank traces · head interventions — on BERT / RoBERTa / DeBERTa / DistilBERT / ELECTRA. An input is a trace; layers are the waterfall; heads are voters; muting a head is the counterfactual.

h * / h L / h L H head×layer scan · pos N inspect token position · spark <tok> [lo:hi] vocab-rank trace · class <label> per-head vote trace · mute L H · scale L H X · unmute L H · clear · cmp <text> diff vs another trace · r refresh · s save