Add halloy template

[hosaka]

Template

• App: Halloy
• Template id (directory): halloy
• New template
• Update to an existing template

What it themes

Renders the theme to $XDG_CONFIG_HOME/halloy/themes/noctalia.toml. The theme = "noctalia" is then prepended to the $XDG_CONFIG_HOME/halloy/config.toml instead of being appended as it is a root key and must appear at the top of the config as per the Halloy docs.

Testing

• App version tested: halloy 2026.8
• Applied a dark theme and confirmed the app picked it up
• Applied a light theme and confirmed the app picked it up
• Re-applied twice and the app config is still correct (hooks are idempotent)

Screenshots

Dark

Light

Hooks

• What the hook does: If necessary, rewrites theme = "noctalia" in the app's config so it points at the rendered file. SIGUSR1 is then sent to halloy which causes it to re-read the config, applying the updated theme.
• It is idempotent: running it twice does not duplicate lines or corrupt the config.
• It fails loudly (non-zero exit, message on stderr) when the app's config is missing.
• It downloads nothing and executes nothing it did not ship in this directory.
• It touches only this app's own config.

Checklist

• The directory name matches the [catalog.<id>] id in template.toml.
• category is one of: ai, audio, browser, chat, compositor, editor, gaming, launcher, system, terminal, misc.
• Every input_path names a file that exists in this directory.
• No generated output or app-specific personal config is committed.