NixOS configuration

My NixOS system and Home Manager configs for all my machines. Everything is managed declaratively with Nix: apps, services, shell, theming, the works.

Structure

• hosts/ - per-machine configs (desktop, laptops, work machine)
• modules/nixos/ - system-level modules (apps, services, settings)
• modules/home-manager/ - user-level modules (shell, editors, UI)
• cfg/ - static config files symlinked into place
• ssh/ - SSH configs and keys

Hosts

Defined in hosts/:

• infernape - desktop PC, transitioning into a half-server, half-desktop setup
• flareon - laptop (new)
• snorlax - work laptop

Installing

Only really useful to me, but if that's you: you need a NixOS install. Home Manager comes along as a NixOS module, so there's nothing separate to set up.

1. Clone this repository
2. cd into it
3. Apply the system configuration:

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

Everyday commands

Apply the config:

nh os switch /home/hackr/nixos

Test without activating:

nh os test /home/hackr/nixos

Show available configurations:

nix flake show

Ubuntu setup

scripts/ubuntu-setup.sh replicates my nushell environment on Ubuntu hosts, no Nix required. It installs the same tools and config files:

• nushell. The shell, with plugins.
• 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/hackrdotsh/hackr-nixos/main/scripts/ubuntu-setup.sh | bash

On first run it asks whether to reset existing config files (defaults to no).

What's in here

• Window manager. niri (Wayland compositor), with gde as a backup.
• Shell. nushell with extensions.
• Editor. Cursor with my extensions and keybindings, though I'm moving to helix.
• Terminal. ghostty as primary, alacritty as backup.
• System tools. btop, fastfetch, atuin, and the usual utilities.

Everything is themed rose-pine: shell, terminals, editors, window manager, system appearance. One palette, everywhere.

Pi (AI coding agent)

Pi gets custom themes, extensions, and settings, all managed through Nix. The source files live in cfg/pi/ and Home Manager symlinks them into ~/.pi/agent/. An activation script then copies them to mutable live paths so Pi can write to them at runtime.

Settings

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

• Provider: zai
• Model: glm-5.2
• Thinking level: medium
• Theme: hackr (custom, see below)
• Quiet startup: on
• Package manager: bun, for extension dependencies
• Global package: pi-super-curl (via npm)

Themes

Two custom TUI themes land in ~/.pi/agent/themes/:

• rose-pine.json. A 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 dark theme built on the "Charmtone Pantera" palette. The colors are named after food (charple, dolly, bok, sriracha, malibu, julep, mustard) over a dark pepper/bbq/charcoal base. This is the active theme, used by the Hackr UI extension.

Extensions

Three custom extensions go into ~/.pi/agent/extensions/, with npm dependencies installed via bun:

• hackr-ui.ts. Replaces Pi's default TUI with a Charm-inspired look:

  • Header: pi (π) digits rendered as a charple → dolly gradient wordmark, 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 (yolo in YOLO mode), no visible borders, context window stats in the bottom bar
  • /yolo command: toggles YOLO mode, which auto-accepts all tool permissions and shows a bright yellow ! YOLO status badge. Genuinely dangerous commands (rm -rf, sudo, chmod 777) still get blocked behind an interactive confirmation dialog
  • /hackr-ui command: toggles the whole thing on/off

• jj-desc.ts. Adds a jj_describe tool and /jj-desc command. Reads the current jj diff, asks the model for a 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 bodies, and a configurable max response length.

How deployment works

The links.nix module handles it in two phases:

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