nix-configs

Use this skill whenever you're working in this NixOS + home-manager config repo and the user is adding, removing, modifying, organizing, or troubleshooting any declarative configuration. Trigger eagerly on questions like "where should this dotfile live?", "how do I add this package?", "why is rebuild failing?", "should this be a symlink or baked in?", on any pasted snippet of `flake.nix` / `*.nix` content, on requests to migrate a config between patterns (raw file → home-manager module, etc.), and on kernel/system-update workflows. Also use when the user mentions a specific app whose config might live in this repo (emacs, claude, msmtp, mbsync, rbw, fish, git, …) — the skill encodes which management pattern fits each one and how to migrate. Better to invoke and not need it than to silently make a mistake the rebuild won't catch.