Elixir Pro

This teaches Claude to write production Elixir with proper OTP architecture, supervision trees, and Phoenix LiveView patterns. It pushes for idiomatic code with pattern matching over conditionals, embraces the "let it crash" philosophy, and covers the full stack from GenServers to distributed nodes. You'd reach for this when building concurrent systems on the BEAM or working with Phoenix apps that need real-time features and clean context boundaries. The focus on fault tolerance, Dialyzer specs, and telemetry instrumentation makes it solid for anyone beyond the tutorial phase who needs to ship reliable Elixir in production.