Nix Flake Development with flake-parts

All flakes use flake-parts with perSystem for per-architecture outputs.

Formatter

Always set formatter = pkgs.nixpkgs-fmt.

Shell scripts

Use pkgs.writeShellApplication (not writeShellScriptBin). It enables strict mode and validates runtimeInputs at build time. Always add meta.description.

Key conventions

• Keep flake.nix minimal — delegate definitions to individual .nix files and import them.
• perSystem for per-architecture outputs (packages, devShells, checks, formatter).
• flake (top-level) for arch-independent outputs (nixosConfigurations, lib, overlays).
• Add meta.description to every package or script.