CLAUDE.md

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

What this repo is

Master dotfiles repo for a Hyprland desktop on Arch Linux. It has two halves:

src/ — a small interactive TypeScript CLI (install/update/remove) that manages packages and dotfiles.
packages/ — the actual dotfiles, laid out as GNU Stow packages (one top-level dir per app, mirroring $HOME, e.g. packages/waybar/.config/waybar/config).

The CLI is the only orchestration layer; it shells out to the real stow, pacman, and yay binaries rather than reimplementing symlinking or package management.

Commands

npm install
npm start install   # interactive: choose packages, installs them, backs up conflicting files, symlinks into $HOME
npm start update     # pacman -Syu + yay -Syu, then re-links (stow --restow) any new files
npm start remove     # removes symlinks (stow -D), restores the most recent backup (does NOT uninstall packages)
npx tsc --noEmit     # typecheck
npm test             # runs test/ via Node's built-in test runner (node:test) through tsx
./docker/test.sh "npm test"   # run the full suite, including stow-dependent tests skipped on a bare host

There is no build step — tsx runs the TypeScript directly.

Testing

test/*.test.ts uses Node's built-in node:test + node:assert (via tsx --test) — no test framework dependency was added. test/gpu.test.ts and test/packages.test.ts are pure unit tests. test/stow.test.ts exercises the real stow binary and real filesystem calls against a throwaway $HOME (a mkdtempSync dir, swapped in via process.env.HOME before stow.ts is dynamically imported, since os.homedir() reads $HOME and the module's path constants are computed at import time); each case is skipped when stow isn't installed, which is the case on a bare host — run ./docker/test.sh "npm test" to execute those for real inside a container that has stow.

docker/test.sh (see docker/Dockerfile) spins up a disposable Arch container with stow/nodejs/npm/git/sudo preinstalled and the repo copied to a writable path inside it, so npm install, Stow symlinks, and backups never touch the host. Run it with no args for an interactive shell, or pass a command string to run non-interactively.

Architecture

src/packages.ts — the package model. Each entry has a tier (required installs with no prompt; recommended is offered via checkbox), an optional group for mutually-exclusive alternatives (e.g. waybar vs ags both have group: "bar", only one gets picked via a select prompt — launcher currently has just hyprlauncher but is kept as a group so alternatives can be added the same way), and an optional dir for when a package's Stow directory name needs to differ from the package name. toDirs() converts chosen package names to their Stow directory names.
src/gpu.ts — detectGpuVendors() shells out to lspci and matches VGA/3D controller lines against NVIDIA/AMD/Intel keywords (word-boundary regexes — a naive /amd|ati/i used to false-positive on the "ati" inside "Corporation"); driverPackagesFor() maps detected vendors to their Arch driver packages. install.ts shows every detected vendor's packages in a pre-checked confirm prompt (installing all of them on hybrid/Optimus laptops), and if NVIDIA is kept, stow.ts's writeNvidiaEnvConfig() writes ~/.config/hypr/conf.d/nvidia.lua (machine-generated, not stowed) with the Wayland env vars Hyprland's NVIDIA docs recommend.
src/stow.ts — all filesystem/process side effects live here: bootstrapping yay and oh-my-zsh/zinit if missing, installing packages via yay, enabling the sddm systemd service (ensureSddmEnabled), backing up real (non-symlink) files that would collide with a Stow target into ~/.dotfiles-backup/<timestamp>/, and wrapping stow/--restow/-D (always invoked with an explicit -d <PACKAGES_DIR> so behavior doesn't depend on cwd). Also reads/writes ~/.config/dotfiles/state.json, which records which package dirs were chosen at install time — update and remove act on this list rather than re-prompting.
src/install.ts, src/update.ts, src/remove.ts — the three subcommands, each a thin sequence of calls into stow.ts, using @clack/prompts for interactive selection in install.ts.
src/cli.ts — dispatches install|update|remove via Node's built-in node:util.parseArgs.
packages/hyprland/.config/hypr/hyprland.lua — Hyprland's config, in its current Lua format (hl.config/hl.bind/hl.monitor/hl.on/hl.env), not the old hyprland.conf ini/hyprlang syntax deprecated since Hyprland 0.55. Easy detail to get wrong when editing — check wiki.hypr.land (or the raw hyprland-wiki GitHub markdown) for current syntax rather than assuming the old ini style.

Adding a new app

Add a directory under packages/ mirroring its $HOME layout (e.g. packages/foo/.config/foo/config), then add a matching entry to src/packages.ts (dir if the Stow directory name differs from the package name, group if it's a mutually-exclusive alternative to another package).

Backup/restore

Backups are stored under ~/.dotfiles-backup/<timestamp>/, mirroring the relative path of whatever real file was moved aside before stowing. remove restores only the most recent backup automatically; restoring an older one is a manual cp -a ~/.dotfiles-backup/<timestamp>/. ~/.

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