Add and Mult are added as extension of the type Effect.t and run installs the effect handler. To add more operations you would have to extend Effect.t again the

Add and Mult are added as extension of the type Effect.t and run installs the effect handler. To add more operations you would have to extend Effect.t again then setup an handler somewhere. The current effects syntax is very rough. It’s considered an experimental feature by the compiler team. Currently effects handlers are exposed to users as a thin wrapper on top of their implementations in the runtime. A better syntax will come but the Ocaml dev team wants to take the time necessary to get it right.