A lot of operations could benefit from having the ability to select defaults.

A default context, default identity in a context, etc;

• context identity list <context-id> instead of context identity list <context-id>
• call <method> instead of call <context> <method> --as <who> etc..

We can take advantage of the Alias API introduced in #1094 & #1114.

The alias name can be default.

The API for defining defaults can be;

context alias add chat-app DJaNFHW9HSt23AJj4R2YA9cERZrAEwuRiBXp8cAAQ1U8
context use chat-app

context identity alias add jake CCG3HwvSFeVgsGkzkv1KLXfwoGKZky9m9FdKWa6vZGS
context identity use jake

but of course, the alias step need not be defined

context use DJaNFHW9HSt23AJj4R2YA9cERZrAEwuRiBXp8cAAQ1U8

context identity use CCG3HwvSFeVgsGkzkv1KLXfwoGKZky9m9FdKWa6vZGS

and when a context has not been aliased or set as default, the required arguments to identity use becomes:

context identity use CCG3HwvSFeVgsGkzkv1KLXfwoGKZky9m9FdKWa6vZGS --context DJaNFHW9HSt23AJj4R2YA9cERZrAEwuRiBXp8cAAQ1U8

And listing (#1117), should take this into account, showing default