I recently asked a question about sbcl for which a response mentioned two functions of which I wasn't aware: #'sb-ext:string-to-octets and #'sb-ext:octets-to-string. In addition to answering my question, this also taught me that I should browse through the external symbols of package sb-ext to see what else might be of use.
My question (sbcl-related) is this: other than browsing through the external symbols of package sb-ext, is there some other manual which describes package sb-ext, and other additions (I'm trying to avoid the word "extension" because it's a specific technical term) to sbcl? #'sb-ext:string-to-octets and #'sb-ext:octets-to-string, for example, are not discussed in the sbcl manual.