No, the dev tool works differently, it does not use the OTP release feature I’m talking about. If you hot upgrade stateful modules you have to supply migration

No, the dev tool works differently, it does not use the OTP release feature I’m talking about. If you hot upgrade stateful modules you have to supply migration functions when the structure changes. https://www.erlang.org/doc/design_principles/release_handling.html https://www.erlang.org/doc/design_principles/release_handlin...