Original CC0 fixture artwork, declarative example cases, reference outputs and newly authored example code are dedicated under CC0 1.0 Universal.
https://creativecommons.org/publicdomain/zero/1.0/

The control artwork comes from spikes/palette-rgba/fixtures/control.ts at 9d3f2898e0d3ca50eda1c4d2ff5afa7f4219fd74. The original numbered sprite comes from examples/tutorials/sprite-grid/fixture.mjs at 65ec6ae5341c8c46eb3223a2b31991ae17254a4d; its literal pixels are retained in cases.json.

This repository-local example imports the unchanged first-party QuickUpscale private palette source and PNG fixture helper. It bundles no third-party runtime or dependency. Node and optional independent Python/Pillow are external environments, not distributed payloads.
