Wildcard Patterns
Modifiers to replace Noise's traditional, rigidly-specified keys and algorithms with dynamically transmitted fields to indicate types of keys and authentication algorithms.
A relatively new idea that hasn't received much thought. Probably should follow after Multi-algorithm patterns as this is more likely to be useful with signatures than DH.
TBD
https://moderncrypto.org/mail-archive/noise/2018/001793.html