CPAL palette length mismatch
Audit code: palette-length-mismatch
Definition
Color palettes have different lengths. CPAL requires every palette to share the same color count — when a glyph layer references slot 4 and only the default palette has 5 colors, the alternate palette will fail to render that layer. Trim or pad palettes on the features tab so all share one length.
How Patens surfaces this
The Patens audit module checks for palette-length-mismatch across five teaching surfaces: the edit-panel inline issue list, the
project-wide audit page, the release pre-flight check, the family hub,
and the home-page project tile. Every surface shows the same plain-English
explanation and links back to this page. This rule is detection-only — there's no automatic fix because the
correction is design-dependent (it requires a judgment call about the
glyph's intended shape or the font's intended behaviour). The audit
message links to the specific glyph or field that needs attention.
Run this check yourself
Patens runs every audit rule live as you draw — including this one.
The editor (in private alpha) shows palette-length-mismatch firing on real
glyphs, or check your own work from the CLI:
npx patens audit your-project.font.json