NixOS Configuration

This repository contains NixOS system and Home Manager configurations for multiple machines. It manages the entire system setup declaratively using Nix, including applications, services, and user preferences.

Overview

This is a comprehensive NixOS configuration repository that includes:

• System-level configurations for multiple hosts
• User-level configurations via Home Manager
• Desktop environments and window managers
• Development tooling and applications
• Custom application configurations

Features

• Multiple Host Support: Configurations for different machines
• Modern Window Manager: Niri Wayland compositor with custom theming
• Development Environment: Preconfigured development tools and IDEs
• Consistent Theming: Coordinated appearance across applications
• Security: Fingerprint support and other security enhancements
• Declarative: All configurations are version-controlled and reproducible

Structure

• hosts/ - Host-specific configurations (laptop, work machine, desktop)
• modules/nixos/ - System-level modules (applications, system services, settings)
• modules/home-manager/ - User-level modules (shell, editors, UI settings)
• cfg/ - Static configuration files for various applications
• ssh/ - SSH configurations and keys

Prerequisites

• A NixOS installation
• Basic knowledge of the Nix language and flake system
• home-manager installed (for user configurations)

Installation (really only useful for the owner)

1. Clone this repository to your NixOS system
2. Enter the repository directory: cd path/to/repository
3. Apply system configuration:

   sudo nixos-rebuild switch --flake .#<hostname>

Available Host Configurations

The repository supports multiple hosts defined in the hosts/ directory. The available configurations are:

• torchic - Personal laptop configuration
• snorlax - Work laptop configuration
• infernape - Personal desktop configuration

Commands (once initially built)

Apply System Configuration

nh os switch /home/hackr/nixos

Test Configuration

nh os test /home/hackr/nixos

Show Available Configurations

nix flake show

Ubuntu Setup

A setup script is available for replicating the nushell shell environment on Ubuntu hosts (without Nix). It installs the same tools and config files:

• nushell (with plugins) — main shell
• carapace — completions
• atuin — shell history
• starship — prompt (poimandres theme)
• zoxide — directory jumping
• direnv — environment loading
• fastfetch — system info
• pokeget-rs — Pokémon sprites for pokefetch

curl -sL https://raw.githubusercontent.com/0xhckr/hackr-nixos/main/scripts/ubuntu-setup.sh | bash

On first run, the script will prompt whether to reset existing config files (defaults to no).

Applications & Tools

The configuration includes:

• Window Manager: Niri (Wayland compositor) (with gde as a backup)
• Shell: Nushell with extensions
• Development: Cursor with extensions and keybindings (working on moving to helix)
• Terminal: ghostty as primary with alacritty as a backup
• System Tools: btop, fastfetch, atuin, and other utilities

Customizations

The configuration uses a custom theme (rose-pine) applied consistently across:

• Shell environments
• Terminal applications
• Text editors
• Window management
• System appearance

Pi (AI Coding Agent)

Pi is customized with custom themes, extensions, and settings managed declaratively via Nix. Source-of-truth files live in cfg/pi/ and are symlinked into ~/.pi/agent/ by Home Manager, with an activation script that copies them to mutable live paths (so Pi can write to them at runtime).

Settings

settings-original.json → ~/.pi/agent/settings.json

• Provider: zai (default AI provider)
• Model: glm-5.1 (default model)
• Thinking level: medium
• Theme: hackr (custom theme, see below)
• Quiet startup: enabled
• Package manager: bun (for extension dependencies)
• Global package: pi-super-curl (via npm)

Themes

Two custom TUI themes are installed into ~/.pi/agent/themes/:

• rose-pine.json — A faithful port of the Rosé Pine colorscheme, with 16 named palette vars and full color mappings for the TUI (syntax highlighting, tool output, markdown rendering, thinking indicators, etc.).

• hackr.json — A bespoke dark theme built on the "Charmtone Pantera" palette. Named after food-themed colors (charple, dolly, bok, sriracha, malibu, julep, mustard, etc.) with a dark pepper/bbq/charcoal base. This is the active theme used by the Hackr UI extension.

Extensions

Three custom extensions are deployed to ~/.pi/agent/extensions/ with their npm dependencies installed via bun:

• hackr-ui.ts — A full TUI makeover that replaces Pi's default interface with a Charm-inspired aesthetic:

  • Header: Renders pi (π) digits as a charple → dolly gradient wordmark, with model name and cwd on the right
  • Footer: Token stats (input ↑ / output ↓ / cost $) on the left, model + git branch + cwd on the right
  • Working indicator: Gradient-animated xoxo pulse cycling between charple and dolly
  • Custom editor: xoxo prompt prefix (or yolo in YOLO mode), no visible borders, context window usage stats in the bottom bar
  • /yolo command: Toggles YOLO mode — auto-accepts all tool permissions and shows a bright yellow ! YOLO status badge. Still blocks genuinely dangerous commands (rm -rf, sudo, chmod 777) with an interactive confirmation dialog
  • /hackr-ui command: Toggles the entire Hackr UI on/off

• jj-desc.ts — Adds a jj_describe tool and /jj-desc command that reads the current jj diff, sends it to the model to generate a concise commit description (imperative mood, <72 char summary, optional bullet details), then sets it via jj describe

• web-fetch.ts — A curl-backed web_fetch tool for fetching URL content (web pages, API responses, remote files). Supports GET/POST/PUT/DELETE, custom headers, request body, and configurable max response length

Deployment Pattern

The links.nix module handles two phases:

1. Symlink (declarative): home.file entries link cfg/pi/* → ~/.pi/agent/*-original.*
2. Activation script (post-generation): Copies -original files to their live mutable paths, installs extension npm dependencies with bun, and sets writable permissions