Crafting Design Systems

Crafting Design Systems

Create or edit a design system that themes HTML output from workbench producer skills. Producers (writing-spec, writing-plans, brainstorming, systematic-debugging, crafting-html, research:research) apply the active design system on their own; this skill is for authoring the design system itself.

When to use this skill

• Create a new design system at project or user scope.
• Edit an existing design system.

When NOT to use this skill

• Producing any HTML artifact: the producer skill applies the active design system on its own.
• Designing a UI or product component: use frontend-design.

Steps

1. Pick scope. Project (.workbench/design-systems/<name>/ at repo root) for repo-wide themes that travel with the codebase. User (~/.claude/workbench/design-systems/<name>/) for personal themes that cross every project. Project wins if the same name exists at both scopes.

2. Pick a kebab-case name. Examples: brand-2026, dark-print, personal.

3. Create the directory and copy the starter CSS:

   NAME=<your-name>
   DSDIR=.workbench/design-systems/$NAME   # or ~/.claude/workbench/design-systems/$NAME
   mkdir -p "$DSDIR"
   cp <path-to-skill>/references/starter-colors.css "$DSDIR/colors.css"
   

   <path-to-skill> resolves to wherever the skill is installed (Claude Code: ~/.claude/plugins/cache/pgoell-claude-tools/workbench/<version>/skills/crafting-design-systems).

4. Edit colors.css. Keep variable names; change values. Variables a producer's template does not reference are silently ignored at render time, so the union starter is safe to ship even when targeting one producer.

5. Write manifest.md (one paragraph: who this is for, what palette/style it embodies):

   # <Name>
   
   <One-paragraph description.>
   

6. (Optional) Add typography.css with :root { --serif: ...; --sans: ...; --mono: ...; } overrides. Producers inline this file after colors.css if present.

7. (Optional) Add components/<name>.html snippets. Each is a self-contained HTML fragment (markup plus scoped <style> block). Contract: references only CSS variables declared by the active producer's template or variables the component declares itself; no external scripts, fonts, or images; safe to paste into any artifact body. Document the intended use in an HTML comment at the top of the file.

8. (Optional) Add images/<name>.<ext> for logos, illustrations, photographs. Producers base64-encode and inline by default. SVG is text and inlines naturally.

9. Wire it as the active design system. Add to .workbench/config.md (or create the file):

   ## Design system
   
   Name: <name>
   

   Per-prompt overrides ("render with the <name> design system") work without editing config.

10. Verify. Run any producer skill (e.g., ask for a brainstorm summary) and inspect the generated HTML. Check that the design system's variable values appear in the <style> block after the template's own :root.

Directory shape

<name>/
  manifest.md          # required
  colors.css           # required, :root { ... } CSS variable declarations
  typography.css       # optional, :root { ... } font stack overrides
  components/          # optional
    <component>.html
  images/              # optional
    <image>.<ext>

Per-template variable inventory

When editing colors.css, knowing which variables each producer template declares helps you decide what to override. The starter file declares the union; this table shows which variables each template actually consults.

crafting-html ships 21 templates with varied styling; inspect the chosen reference before authoring overrides for that producer.

Multi-slide presentations are not themed by design systems: the presentations plugin's skills consume brand presets instead (see that plugin's presets/README.md contract).

Bundled

• references/starter-colors.css: union of every variable above, populated with the templates' current values. Copy as the starting point for colors.css.
• references/example-design-system/: a fully-populated twilight example (manifest.md, colors.css, typography.css). Read for shape reference; do not copy as the active system.

No em-dashes / en-dashes

Per repo rule, no U+2014 or U+2013 codepoints in this skill's tree, including bundled references/*.css and references/*.md. In HTML body copy, entity forms —, —, –, – are permitted.