[dreamwasp]

Summary

The color generator from #50, split out as a supplementary spike. It is not shipped API, and nothing on the runtime path imports it. Merging this would add build tooling, not runtime code.

Contents (the diff against cass-gmt-1825-color-system is this tree):

• packages/gamut-styles/src/colorSystem/: the generator. Brand hues in, palette (8 slots × 11 grades) and 43 roles × 2 modes out. Includes migration.ts (design's old → new map), probe.ts (tenant probe), contentModes.ts, and validate.ts.
• packages/gamut-styles/scripts/build-tokens.ts and validate-tokens.ts: build:tokens and validate:tokens, run with jiti.
• colorSystem/__fixtures__/sandbox-dffd84b.json: design's sandbox dump the parity check uses.
• The build-only dependencies (culori, jiti, style-dictionary) that feat(gamut-styles)!: generated color system with tokens.css as the color contract #50 dropped.

Why a spike

cass-gmt-1825-color-system (#50) ships the generated output under src/tokens/generated/, and that is what the runtime needs. The generator itself is tooling. Per the stack notes, it moves to @skillsoft/gamut-brand in #66, which is the intended home. This PR keeps the working generator in one place for review and for regenerating the output.

Testing instructions

1. git fetch && git checkout cass-gmt-1825-color-spike && yarn
2. yarn workspace @skillsoft/gamut-styles build:tokens regenerates src/tokens/generated/. The output should match what feat(gamut-styles)!: generated color system with tokens.css as the color contract #50 has committed.
3. yarn workspace @skillsoft/gamut-styles validate:tokens runs the parity check (88 rungs, every role) and the contrast guarantees.
4. Storybook, theme toolbar → Skillsoft (color spike), which reads the generated tokens.css.

The generated header comments still say scripts/build-tokens.ts. The script is on this branch, not on #50.

🤖 Generated with Claude Code

[dreamwasp]

Closing: the generator stays on cass-gmt-1825-color-system (#50), because the brand inputs (skillsoft, originalCodecademy, admin, platform, lxStudio) and the stacked PRs depend on it. The long-term home is @skillsoft/gamut-brand in #66. This branch now has no diff against #50.