create-utilities

create-utilities

Generate a utility class string from a plain-language description of visual intent. Detects which utility library the project uses (acss-kit, Tailwind, Bootstrap, or Tailwind-compatible fallback) and maps the description to specific class names via LLM reasoning. Outputs a class string and a one-line HTML example ready to use — chains naturally into /css-to-class when the user wants to consolidate into a named class.

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Input forms

Form	Example
Plain description	"a card with white background, 1rem padding, subtle shadow, and rounded corners"
Component phrase	"primary button with hover state"
HTML element with intent	<div> <!-- make this a centered hero section -->

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Framework detection

Grep project files to identify which utility library is active:

• acss-kit — utilities.css present in the project containing selectors like .bg-primary, .flex, .m-4
• Tailwind — tailwind.config.* file exists, or @tailwind base appears in any .css/.scss file
• Bootstrap — bootstrap*.css present in the project, or Bootstrap-specific utility patterns (d-flex, btn, container) appear in HTML/template source files
• Generic fallback — no framework detected; use Tailwind-compatible naming (flex, p-4, rounded, etc.) — the de-facto standard most developers recognise

When multiple frameworks are detected, use AskUserQuestion to confirm which vocabulary to use — never silently pick one.

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Workflow

1. Parse description. Extract the visual properties being described: layout, spacing, color, typography, borders, shadows, states. If the description is too vague to generate a confident class list (e.g., "make it look nice", "a styled button"), use AskUserQuestion with specific follow-up prompts before proceeding:

   • What layout type? (flex / grid / block)
   • What color role? (primary / neutral / danger / etc.)
   • What spacing scale? (small / medium / large, or a specific value)

2. Detect framework. Run the framework detection above:

   find . \( -name "utilities.css" -o -name "tailwind.config.*" -o -name "bootstrap*.css" \) \
     -not -path "*/node_modules/*" -not -path "*/.git/*" -not -path "*/dist/*" -not -path "*/build/*"
   

   Also grep for @tailwind base in .css/.scss files. If a utilities.css file is found, confirm it is acss-kit by grepping for a distinctive selector before concluding:

   grep -l "\.bg-primary" <path-to-utilities.css>
   

   If the grep does not match, treat utilities.css as an unrecognised file and do not classify it as acss-kit.

   If multiple frameworks are found, use AskUserQuestion to confirm which vocabulary to use — do not auto-fallback. Only fall back to Tailwind-compatible naming when no framework is detected, or when the user explicitly confirms no framework after clarification.

3. Map to classes. For each extracted visual property, use LLM reasoning to select the best class name from the detected framework's vocabulary. Apply framework-specific naming conventions:

   • acss-kit: bg-primary, p-4, flex, items-center, rounded, shadow
   • Tailwind: bg-primary, p-4, flex, items-center, rounded, shadow
   • Bootstrap: bg-primary, p-3, d-flex, align-items-center, rounded, shadow-sm
   • Fallback: Tailwind-compatible names

   Order the final class list: layout → spacing → color → typography → border/radius → shadow → state.

   When a description maps to multiple plausible scale values (e.g., "large padding" → p-6, p-8, or p-10?), use AskUserQuestion to confirm the intended value before emitting.

4. Apply accessibility defaults. If the description implies an interactive element (button, link, input, select, or similar), handle focus styling based on the detected framework:

   • Tailwind / fallback: append focus-visible:ring to the class list.
   • acss-kit: the utility bundle does not ship a focus-visible or focus-ring utility class. Do not add a class. Instead, emit a warning in the summary: "No focus utility available in acss-kit's utility bundle — add :focus-visible { outline: 2px solid var(--color-primary, currentColor); outline-offset: 2px; } to your project CSS, or use an acss-kit component class (e.g., .btn) that provides focus styling."
   • Bootstrap: append focus-ring (Bootstrap 5.3+) or note that Bootstrap provides native focus styling.

   Always add a brief # a11y note in the summary explaining what was added (or why no class was added).

5. Emit output. Print two fenced code blocks:

   Class string (Tailwind example):

   flex items-center p-4 bg-primary rounded shadow focus-visible:ring
   

   HTML example (one line, showing the class applied to the most appropriate element for the description):

   <button class="flex items-center p-4 bg-primary rounded shadow focus-visible:ring">Label</button>
   

   The focus class (focus-visible:ring, focus-ring, or none) varies by framework — see step 4.

6. Print summary. One concise block listing:

   • Framework detected (or fallback used)
   • Number of classes generated
   • Any a11y classes added (with brief reason)
   • Any ambiguities resolved via AskUserQuestion
   • Any described properties that could not be mapped to a class (listed as unmapped)
   • If the description implies a foreground/background color pair likely to fail WCAG 4.5:1 contrast, flag it with a one-line contrast warning

   Close with: Run /css-to-class [name] to consolidate into a named class.