# Flake rules

## Keep `flake.nix` as flake wiring

### Rule

Add flake inputs in `flake.nix`.
Put root flake output composition in `src/flake/default.nix`.
Keep `src/flake` focused on composing public outputs from implementation files it imports.
Put project-specific package implementation in that project's source tree, for example
`src/xatu/package.nix`.
Put NixOS and dotfiles implementation in `src/dotfiles`.
Use `flake.nix` to pass inputs into the root flake implementation.

### Rationale

This keeps dependency declarations separate from output logic.