rewrite_conditions verified
Rewrite conditions
Extra tests a message must pass — on the envelope, the subject, or any JSON property — before its rule applies.
In detail
Undocumented as a table, though the console exposes nine condition types. Conditions address message properties by JSON pointer, so a rule can depend on a field our own exporter put there — which is the cleanest way to make node-side behaviour follow a decision taken in Hub.