Historical commentary

Bluefin is in a transitionary phase moving away from the old terminology of "handle" and naming handles/effects based on MTL/transformers style names (e.g. Exception/Reader/Stream) and moving towards calling these things "capabilities" and naming them after their main operation (e.g. Throw/Ask/Yield). You are encouraged to use the API beneath Bluefin.Capability because that will be the supported API in the future.

You are encouraged to change your usage of the old modules on the left to the new modules on the right: