design-system

name	design-system
description	Enforces the Manuscript design system when building or modifying UI components. Activates when creating pages, styling components, choosing colors, adding icons, building layouts, creating panels, or working with any visual element. Also triggers when user mentions design, style, color, layout, spacing, or "make it look like".

Manuscript Design System Enforcement

Full reference: docs/design-system.md

Read that file if you haven't in this conversation. This skill is the enforcement summary.

Hard Rules (never break)

1. No hardcoded hex colors in .tsx files. Every color must be a Tailwind token class (text-ink, bg-surface, border-border, etc.). The only exception is app.css where tokens are defined.

2. Font sizes from the 8-step scale only:

   • 11px (text-[11px]) — badges, smallest labels
   • 12px (text-xs) — sidebar items, small buttons
   • 13px (text-[13px]) — default button text, compact body
   • 14px (text-sm) — default body text, inputs
   • 16px (text-base) — panel titles, emphasis
   • 20px (text-xl) — page headings
   • 24px (text-2xl) — large headings
   • 32px (text-[32px]) — editor chapter heading
   • No 10px, 15px, 18px (outside .editor-prose), 22px, or 26px.

3. Icon sizes from the 5-step scale only:

   • 12px (size-3) — micro indicators
   • 14px (size-3.5) — compact UI (sidebar, small buttons)
   • 16px (size-4) — standard UI (toolbar, menus)
   • 20px (size-5) — medium (panel actions)
   • 24px (size-6) — large (panel headers)
   • No size={13}, size={10}, size={18}, size={15}.

4. Border radius from the 5-step scale only:

   • rounded (4px) — progress bars, micro elements
   • rounded-md (6px) — buttons, inputs, menu items
   • rounded-lg (8px) — cards, panels, dropdowns
   • rounded-xl (12px) — dialogs, large cards
   • rounded-full — pills, badges, avatars
   • No rounded-[5px], rounded-[10px], rounded-[14px].

5. font-serif only inside .editor-prose. All UI text uses font-sans (the default).

6. Font weights: 400/500/600 only. 700 is reserved for <strong> in prose.

7. No bare bg-white — use bg-surface-sidebar or bg-white dark:bg-surface-card.

8. Right-panel widths are fixed: 272px or 320px. The left sidebar is resizable from 200px to 400px (232px default).

Color Quick Reference

Text hierarchy (choose by importance, not feel)

• Must read → text-ink
• Supporting → text-ink-muted
• If they look → text-ink-faint
• Secondary body → text-ink-soft

Backgrounds

• Page: bg-surface
• Cards/panels: bg-surface-card
• Sidebar: bg-surface-sidebar
• Button fills/hovers: bg-neutral-bg
• Accent tint: bg-accent-light or bg-surface-warm

Borders

• Default: border-border
• Subtle: border-border-subtle
• Dashed: border-border-dashed

Accent (use sparingly — <10% of UI surface)

• bg-accent / text-accent — active items, CTAs
• hover:bg-accent-dark — accent hover state
• bg-accent-light — accent-tinted backgrounds

Component Reuse — Reuse first, shadcn second, custom last

The reuse rule is non-negotiable. Before writing markup:

1. Check resources/js/components/ui/ — if a component fits, use it.
2. If nothing fits, install a shadcn component and adapt it to our tokens.
3. Custom markup is a last resort. The moment a custom snippet appears in a second file, lift it into components/ui/.

A duplicated button, input, or chat surface IS a bug. Fix the duplication before it spreads.

Always check resources/js/components/ui/ first: Button, Input, Select, Textarea, SearchInput (filter/search bar — magnifier + input + clear button), AiChatInput (AI chat compose surface — auto-grow textarea + circular send button), Dialog, Drawer, PanelHeader, SectionLabel, ContextMenu, FormField, Card, Toggle, ToggleRow, ToggleGroup, Checkbox, Collapsible, Kbd, Alert, Badge.

Never roll your own AI chat input. When the user talks to an AI agent (Plot Coach, editor AI chat, anywhere conversational), use <AiChatInput value={...} onChange={...} onSend={...} placeholder={...} disabled={...} />. Enter sends, Shift+Enter inserts a newline. Don't assemble a textarea + send button pair inline.

Section Labels Pattern

text-[11px] uppercase font-medium tracking-wide text-ink-muted

Before Completing UI Work

1. No hardcoded hex in component files
2. Dark mode works (tokens, not hardcoded colors)
3. Font sizes, icon sizes, radius all from the scale
4. Reuses existing components — no ad-hoc <button> or <input>