Option	Description
`--file <path>`	Theme file to export (or pass positionally).
`--format <fmt>`	`css` or `json`. Defaults to `css`.
`--output <file>`	Write the export to a file instead of stdout.

CSS variables

A single theme:

bash

theme-kit export theme.json --format css --output theme.css

css

:root {
  --theme-color-background: #f8fafc;
  --theme-color-primary: #6366f1;
}

A light + dark pair exports both blocks:

css

1:root {
2  /* light */
3}
4
5.dark, [data-theme="dark"] {
6  /* dark */
7}

css

@import "./theme.css"; /* :root plus the .dark block */

JSON

bash

theme-kit export theme.json --format json

Emits the flat --theme-* key/value map as JSON — useful for editors, scripts, or configuration systems that consume token maps.

Omit --output to print the CSS (or JSON) to stdout.

Code	Meaning
`0`	Exported successfully.
`2`	Invalid arguments (missing file or unknown format).