# AGENTS.md

Guidance for agents working in this repository.

## What this is

One visual identity for a Hyprland desktop: Catppuccin Macchiato, Noto Sans for
UI text, Inconsolata Nerd Font Mono for monospace. It covers rofi, dunst,
Hyprland window borders, conky, Qt5/Qt6, GTK3/GTK4, waybar, kitty and neovim.

The repo holds the canonical copies. `./install.sh` symlinks them into place, so
the working config cannot drift from what is committed. Everything outside
`~/.config/rofi/udt/` and `~/bin/` was edited in place; `docs/MIGRATION.md` is
the record of what changed and where the backups are.

## One palette, many consumers

Colours are written down once. `palette/<scheme>.conf` holds them under the
scheme's own names, `palette/roles-<scheme>.conf` says what each is for, and
`palette/roles.conf` is a single `scheme = ` line selecting the pair.
`bin/udt-palette` renders that into every consumer's own syntax; `install.sh`
runs it first, before anything is linked.

Four schemes ship: `macchiato`, `tokyo-night`, `nord`, `dracula`. Switching is
one line plus `./install.sh`.

Generated files are gitignored, because tracking them would turn every scheme
switch into a diff. Editing one is pointless: the next install overwrites it.
The generated set is `rofi/udt/palette.rasi`, `templates/dunstrc`,
`templates/conky.conf`, `templates/waybar/theme.css`,
`templates/terminal/kitty-theme.conf` and `bin/udt_colors.py`. The last is
imported by `udt-accent`, which is why its accent table follows the scheme.

Roles are a flat namespace, so a name collides across sections: conky's outline
is `body_outline` because waybar already has `outline`. A role value is a
palette name with two optional modifiers, `name/75` for 75% alpha and
`name*50` for half brightness. The second exists only because GTK's
`shade(@main-bg, 0.5)` has no palette name to point at: half-brightness crust
is darker than the darkest colour any of these schemes ships.

**Adding a scheme means adding two files, never editing a consumer.** Every
scheme must define the same role set; `udt-palette --selftest` fails if one
drifts, which is what stops a switch from breaking a config nobody looked at.

## The accent

One colour moves: `@accent`. `bin/udt-accent` reads the current wallpaper,
extracts its signature colour, and snaps it to the nearest of ten Catppuccin
accents by perceptual hue in CIELAB. `wallp` calls it on every wallpaper change.

It writes five things: `~/.cache/wal/udt-accent.rasi` (rofi),
`~/.cache/wal/udt-border.lua` (Hyprland), the accent substitution in
`~/.cache/wal/dunstrc`, `~/.cache/wal/colors.json` (Firefox, via
pywalfox), and `~/.cache/wal/udt-palette.qml` (quickshell).

The QML palette is the one output that is not only the accent: it carries
the whole structural palette too, parsed out of `rofi/udt/palette.rasi`
rather than duplicated in the script. That file stays the single place the
Macchiato values are written down. Quickshell components watch the generated
file and re-read it in place, so a palette edit reaches a running shell
without restarting it; see the `quickshell` repo alongside this one.

**Extraction is deliberately isolated from the pywal cache.** It calls
`pywal.backends.colorz.get()` directly, which returns a list and writes nothing.
Running `wal -i` instead would rewrite all of `~/.cache/wal`, including the
terminal's ANSI colours, and that is the exact failure this design exists to
avoid. If you change `signature_color()`, verify it still writes nothing.

`colors.json` is the one pywal file `udt-accent` does rewrite, and it rewrites
it wholesale rather than editing it: a fixed Macchiato palette with the accent
in the cursor and the two highlight slots. That is deliberate. pywalfox reads
`colors.json` and nothing else, so it is the only way Firefox can follow the
accent, and overwriting it costs nothing because nothing else reads it. In
particular kitty reads `~/.config/kitty/current-theme.conf`, not this file, so
the terminal palette stays fixed no matter what the wallpaper looks like. The
write lands after `wallp` has already run `wal --theme`, so it wins; reorder
those two and pywal's wallpaper-derived colours come back.

Not everything tracks the wallpaper. rofi, dunst, Hyprland borders and Firefox
do; conky, Qt, GTK and waybar sit on fixed lavender, which is also the fallback
when a wallpaper is too grey to snap. Qt and GTK apps only reread a theme on restart,
so a moving accent there would leave running apps disagreeing with new ones.

## Verifying visual changes

`rofi -no-config -theme <absolute-path> -dump-theme >/dev/null` catches syntax
errors without a display. It does **not** tell you what renders: it normalises
values, prints `(null)` for every image, and collapses multi-value margins.

For anything visual, screenshot and measure:

    grim -o DP-1 /tmp/shot.png

Reasoning about rofi's box model was wrong repeatedly during this project;
measuring pixels was right every time. When a widget looks wrong, measure its
bounding box before theorising about why.

Rofi needs a display, so these steps run in the user's session. Do not judge
them by exit code: rofi exits non-zero for ordinary reasons such as Escape.

## Things that are not where they look

- **rofi is 2.0.0**, not the 1.7.3 its config header claims. `rofi -v` is the
  authority. `-width` is gone; width lives in the theme.
- **`userimage` in `powermenu.rasi` only honours its margin.** A `width` with
  `expand: false` collapses it to a line, and a percentage margin resolves
  against the whole window rather than the padded column. Its 230px margin is
  tied to the 680px column in `mainbox`; both move together.
- **A layout that hardcodes `children` silently drops `-mesg`.** That is why
  `list.rasi` lists the message widget even though most callers pass nothing.
- **`ClearlyU` is installed and claims large parts of the Private Use Area**, so
  it can win fontconfig's fallback and draw a blank where another font has the
  glyph. `fc-match ":charset=XXXX" family` says who actually wins. The `U+F0xxx`
  Nerd Font ranges avoid the problem.
- **GTK3's theme comes from gsettings on Wayland**, not `settings.ini`. It was
  pinned to `Breeze`, silently overriding the file, for who knows how long.
- **GTK4 ignores `gtk-theme-name`.** Its stylesheet is symlinked into
  `~/.config/gtk-4.0/theme` and imported by `gtk.css`.
- **Hyprland's Lua parser refuses `hyprctl keyword`** ("keyword can't work with
  non-legacy parsers") and has no source directive. The border colours are a Lua
  table read with `dofile()`.
- **`wallp` starts `swaybg` in the background**, which inherits the shell's
  stdout, so a pipe or command substitution appears to hang after `wallp` has
  already finished. Redirect its output when calling it from a script.
- **waybar's own CLAUDE.md documents a stale CSS load order.** The
  `modules-*.css` and `states.css` files it names are not imported by anything;
  `style.css` pulls in `styles/main.css`. One of the dead files holds a
  `font-family` that looks authoritative but does nothing.

## Editing rules

- **conky**: change colours in the `conky.config` block only. `conky.text` is
  laid out with absolute `${goto}` pixel offsets tuned to label widths, so
  editing text means re-tuning every goto on that line. See
  `~/.config/conky/CLAUDE.md`. Conky does not hot-reload.
- **Committed files carry no home paths.** A gitleaks hook blocks them, and it
  has been right every time. Where a live config mixes theme keys with personal
  data (`qt6ct.conf` has an `ignored_applications` list), track only the
  theme-relevant keys.
- **Themes that reference an image cannot be committed with a real path.**
  `launcher.rasi` carries an `@WPAPER@` placeholder that `install.sh` rewrites.
  rofi does not expand `~` inside a `url()`.
- After editing anything under `rofi/udt/` or `palette/`, run `./install.sh`.
- `bin/udt-palette --selftest` resolves every role in every scheme. Run it
  after touching a palette, a role map, or the generator.
- `bin/udt-accent --selftest` covers the snapping logic. Run it after touching
  the colour maths.

## Reloading

| | How |
| --- | --- |
| rofi | nothing; the theme is read per launch |
| dunst | `udt-accent` restarts it |
| Firefox | `udt-accent` runs `pywalfox update` |
| Hyprland | `hyprctl reload` |
| waybar | `killall -SIGUSR2 waybar` |
| kitty | `pkill -USR1 -x kitty` |
| conky | restart it; no hot-reload |
| Qt / GTK apps | restart the app |