Advanced NixOS and Linux expertise for flake development, system debugging, packaging, security hardening, and innovative problem-solving. Triggers when working with NixOS configurations, Nix flakes, Linux system administration, debugging complex issues, building packages, compiler optimizations, security implementations, git workflows, or when creative/unconventional solutions are needed. Proactively suggests optimizations, architectural improvements, and cutting-edge approaches. Use when facing challenging Linux/NixOS problems, building sophisticated packages, implementing security measures, or designing scalable infrastructure.