NixOS Configuration

🖥️ Hosts

Host	Role	CPU	GPU	Storage	Features
dayman	Laptop	Intel	NVIDIA	NVMe (disko)	TLP, Thunderbolt, Lid controls
nightman	Desktop	AMD	NVIDIA	NVMe + drives (imperative)	Triple monitors, Virtualization
lab	SBC / lab box	—	—	SATA (disko)	Minimal Hyprland, firewall off

There is also a testvm target — a throwaway VM build (GNOME desktop) used to test config changes; it is not a physical host.

🚀 Features

System Architecture

• NixOS 25.11 with Flakes
• Disko for declarative disk partitioning
• Home Manager for user environments

Desktop Environment

• Hyprland (Wayland compositor) with extensive customization
• Catppuccin Macchiato theme throughout
• Waybar, Wofi, SwayNC for desktop utilities
• GNOME is also available (used by the testvm target)

Development Stack

• Editors: Cursor, VS Code, Neovim (LazyVim), Claude Code
• Languages: Python, Node.js, Go
• Tools: Git, Direnv, FZF, Ripgrep, Bat
• Containers: Docker, Libvirt/QEMU
• Terminal: Zsh + Starship, Zellij

Agent Tooling

• Claude Code, OpenCode, Codex, and OMP managed via Home Manager modules
• Shared skills under home/modules/agent-skills/skills/ symlink into ~/.claude/skills/ and ~/.agents/skills/

Security & Auth

• 1Password integration
• YubiKey support (PAM U2F)
• opnix (1Password-backed) for secret management
• NetBird mesh VPN (see nix/modules/network/netbird.nix)

🛠️ Usage

Quick Commands

just update              # Update flake inputs
just switch              # Apply configuration (current host)
just build hostname      # Build a specific host without applying
just deploy host ip      # Remote deployment
just testvm hostname     # Boot a host config in a throwaway VM
just testvm-headless h   # Same, headless with SSH on a forwarded port

Initial Setup

1. Clone repository
2. Update hardware configuration for your system
3. Run just switch hostname
4. Change default password immediately: passwd

Maintenance

• Updates: just update then just switch
• Garbage collection: Runs automatically (daily, 3-day retention)
• VM testing: just buildvm hostname, or just testvm hostname to boot it

Each host pins its own system.stateVersion (set at install time and intentionally left alone per host — it is not a "current NixOS version" and should not be bumped on upgrade).

📁 Structure

.
├── flake.nix                # Entry point, defines hosts via mkSystem
├── nix/
│   ├── <host>.configuration.nix   # Per-host system config
│   ├── modules/             # System modules (common, desktop, hardware, software, virtualization)
│   ├── disks/               # Disko layouts
│   ├── hardware/            # Per-host hardware configs
│   ├── profiles/            # Reusable system profiles
│   └── users/               # User definitions
└── home/
    ├── <host>.nix           # Per-host Home Manager config
    ├── modules/             # Home Manager modules (shell, editors, desktop apps)
    │   ├── agent-skills/    # Shared SKILL.md set for coding agents
    │   ├── claude-code/     # Claude Code commands, plugins, settings
    │   ├── opencode/
    │   ├── omp.nix          # OMP coding agent and LiteLLM discovery
    │   └── hyprland/
    ├── configs/             # Application dotfiles
    ├── scripts/
    └── wallpapers/

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