Built-in skill — OTP supervision, GenServer and concurrency design.
Injects a system-prompt section on when a GenServer is actually warranted
(never for code organisation), "let it crash" instead of defensive try/catch,
the three supervision strategies, wrapping a server behind a client API,
Task.Supervisor over bare Task.async/1, the GenServer serialisation
bottleneck and its ETS alternatives, restart policies, and why domain entities
do not belong in processes.
Activates on prompts containing "genserver", "supervisor", "otp",
"supervision tree", "task.async", "process", "gen_server",
"dynamic_supervisor" or "let it crash". Group :coding;
tags :elixir, :otp, :genserver, :supervisor, :concurrency.