The author created a set of C++ bindings for libcouchbase, aiming to provide a standard and generic interface. They stayed away from using large external libraries like boost or C++11 to ensure maximum compatibility for C++. The bindings expose the semantics of command objects, response objects, and callbacks. Command objects inherit from a `Command` object and have accessors for key and hashkey, while response objects contain the C `lcb_resp_t *` as their only data member. The author implemented a callback interface in a unified object, allowing users to handle commands without explicitly setting handlers.