CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Build Commands

# Rebuild and switch to main system (default specialization)
ns                    # alias for: nh os switch --specialisation 00-main-system

# Update flake inputs and commit lock file
nu                    # alias for: (cd ~/nixos-dots && nix flake update --commit-lock-file)

# Edit configuration in Emacs
ne                    # alias for: emacsclient -c ~/nixos-dots/configuration.nix

# Direct rebuild commands (if not using nh aliases)
sudo nixos-rebuild switch --flake .#mrfluffyPC
sudo nixos-rebuild switch --flake .#mrfluffyLaptop

Architecture

Multi-Host / Multi-User System

This is a NixOS flake configuration targeting two machines (mrfluffyPC, mrfluffyLaptop) with three users (mrfluffy, work, game). The systemName variable ("pc" or "laptop") is passed through specialArgs to enable hardware-conditional configuration.

Specializations

Two boot specializations exist in configuration.nix:

00-main-system: Default desktop environment with Hyprland, full dev tooling
01-steam: Gaming mode with Gamescope, Steam Big Picture, auto-login to game user

Directory Structure

flake.nix              # Flake inputs and nixosConfigurations
configuration.nix      # Entry point: users, home-manager, specializations
hardware-configuration.nix
system/                # NixOS modules (boot, hardware, services, packages)
  ├── boot.nix         # Bootloader, kernel config (laptop/pc conditional)
  ├── hardware.nix     # GPU drivers (Intel for laptop, AMD for PC)
  ├── nixOSPkgs.nix    # System packages (~2300 lines)
  ├── services.nix     # System services (greetd, pipewire, etc.)
  └── specialisation/  # Boot mode configs
home/                  # Home Manager user configs
  ├── mrfluffy.nix     # Main user (imports dots/, stylix, services)
  ├── work.nix         # Work user
  ├── game.nix         # Gaming user
  ├── homePkgs.nix     # User packages
  └── stylix.nix       # Unified theming (base16, fonts, cursors)
dots/                  # Application dotfiles as Nix modules
  ├── hyprland.nix     # Primary window manager
  ├── waybar.nix       # Status bar
  ├── foot.nix         # Terminal
  ├── zsh.nix          # Shell config with aliases
  └── doom/            # Doom Emacs config (raw files)
assets/Wallpapers/     # Wallpaper images

Window Manager Selection

Set in flake.nix via window_manager variable (options: "hyprland", "niri", "all"). Currently set to "hyprland". This variable is passed to modules for conditional WM configuration.

Theming

Stylix + nix-colors provide unified theming across all applications:

Color scheme: hardcore (base00: #141414)
Configured in home/stylix.nix

Conditional Hardware Config

Use the systemName variable ("laptop" or "pc") for hardware-specific code:

let
  isLaptop = systemName == "laptop";
  isPc = systemName == "pc";
in
# ... use lib.mkIf for conditional values

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