feat(composer): expand ui-system from placeholder to full interview
ui-system skill is no longer a placeholder. Full design-system and interaction-design interviews with branching, defaults, batched question clusters, and an 'accept default / skip' protocol so users move through fast when they have taste and patient when they don't. Design system interview covers: visual posture, color (with WCAG contrast verification before writing), typography, spacing, radii, shadows, density, visual motion, components, theming, and accessibility tokens (focus ring, hit targets). Interaction design interview covers: input model, state-surface declarations per action class, motion posture and triggers, breakpoints, i18n, four state postures (empty/loading/error/offline), time formatting, keyboard policy, optimistic-update strategy with rollback and conflict resolution, gestures, focus management, notification patterns, selection, and drag-and-drop. Reference banks for "make it look like Linear/Notion/Stripe/etc." translate well-known products into starting tokens — user still confirms each value, no silent invention. Templates expanded to hold the full output: - design-system/SKILL.md grew sections for accessibility tokens, density, dark-mode mapping, contrast verification, theming variants - design-system/tokens.ts now exports color (light + dark), typography (family/size/weight/line-height/letter-spacing), spacing + density- aware padding tokens, radii, shadows, motion (durations + easings), z-index scale, breakpoints, hit-target minimums - design-system/components.md gained anatomy/state/a11y coverage for 10 primitives plus an "adding a new component" workflow and a "patterns to avoid" list (nested cards, color-only meaning, etc.) - interaction-design/SKILL.md gained sections for optimistic updates, conflict resolution, gestures, focus management, notification patterns, selection/multi-select, and drag-and-drop Hard rules: never invent on the user's behalf; <TBD> instead. Verify contrast before writing color tokens. Always declare prefers-reduced- motion as honored. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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---
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name: <SLUG>-design-system
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description: Design system for the <PROJECT NAME> project. Color tokens, typography, spacing, radii, shadows, motion durations, and component vocabulary. Load and apply whenever building UI for this project — generating mocks, writing components, picking colors, configuring Tailwind, styling native screens, building themes, designing CSS, or making any visual decision. The canonical visual reference for this project; if anything visible is being touched, this skill should be in context. Pairs with <SLUG>-interaction-design.
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description: Design system for the <PROJECT NAME> project. Color tokens, typography, spacing, radii, shadows, density, motion, accessibility tokens, and component vocabulary. Load and apply whenever building UI for this project — generating mocks, writing components, picking colors, configuring Tailwind, styling native screens, building themes, designing CSS, or making any visual decision. The canonical visual reference for this project; if anything visible is being touched, this skill should be in context. Pairs with <SLUG>-interaction-design.
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---
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# <PROJECT NAME> design system
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> **Status: <draft | reviewed | locked>**
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> Generated by Composer's `ui-system` phase. Re-running that phase
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> updates this skill (with confirmation).
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> updates this skill (with confirmation on overwrite).
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## How to use this skill
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Whenever you generate or edit UI for this project — a mock, a real
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component, a theme, a CSS file — read this SKILL.md and the sidecar
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files first, then use the tokens. Do not hardcode values. Do not
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introduce new components without proposing them here first.
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When generating or editing UI for this project — a mock, a real
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component, a theme, a CSS file — read this SKILL.md and `tokens.ts`
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first, then use the tokens. Never hardcode visual values. Don't
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introduce new components without proposing them in `components.md`.
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Sidecar files in this skill directory:
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- `tokens.ts` — machine-readable token export. Import in mocks/code.
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- `components.md` — component vocabulary with anatomy.
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- `components.md` — component vocabulary, anatomy, states.
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## Visual posture
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<!-- One or two sentences describing the feel. "Quiet, dense, monochromatic with a single brand accent." Or "Playful, generous spacing, expressive type." -->
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<!-- One-sentence north star. -->
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<TBD: visual posture>
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<TBD: visual posture sentence>
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## Color
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### Brand
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- Primary: `<#hex>` — <name>
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- (Secondary, if any): `<#hex>` — <name>
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- **Primary**: `<#hex>` — <name>
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- **Secondary** *(if any)*: `<#hex>` — <name>
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### Neutrals
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- Tone: <warm | cool | true>
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- Scale: 50 / 100 / 200 / 300 / 400 / 500 / 600 / 700 / 800 / 900 / 950
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- **Tone**: <warm | cool | true>
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- **Scale**: 50 / 100 / 200 / 300 / 400 / 500 / 600 / 700 / 800 / 900 / 950
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- See `tokens.ts` for hex values.
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### Semantic
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| Role | Value |
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|---|---|
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| Success | `<#hex>` |
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| Warning | `<#hex>` |
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| Error | `<#hex>` |
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| Info | `<#hex>` |
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| Role | Light | Dark *(if dark mode)* |
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|---|---|---|
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| Success | `<#hex>` | `<#hex>` |
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| Warning | `<#hex>` | `<#hex>` |
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| Error | `<#hex>` | `<#hex>` |
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| Info | `<#hex>` | `<#hex>` |
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### Dark mode
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<TBD: yes / no / system-following + token mapping>
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- **Posture**: <yes | no | system-following>
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- **Token mapping**: see `tokens.ts` `colorDark` (if applicable)
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### Accessibility contrast
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- **Target**: WCAG <AA | AAA>
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- **Verified pairings** (against `neutral.50` light bg, `neutral.950` dark bg):
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- body text: <ratio> — ✅
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- UI components: <ratio> — ✅
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- <flag any below threshold>
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## Typography
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- **Display family**: <name>, weights <list>
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- **Body family**: <name>, weights <list>
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- **Scale base**: <px>, ratio <1.125 | 1.2 | 1.25 | 1.333>
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- **Sizes**: xs / sm / base / lg / xl / 2xl / 3xl / 4xl
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- **Line-height**: tight for display, normal for body, relaxed for long-form prose
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See `tokens.ts` for exact px values.
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- **Body family**: <name | "(same as display)">, weights <list>
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- **Mono family** *(if used)*: <name>
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- **Scale base**: <px>, ratio <1.125 | 1.2 | 1.25 | 1.333 | 1.5>
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- **Sizes**: see `tokens.ts` `fontSize` — xs / sm / base / lg / xl / 2xl / 3xl / 4xl
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- **Line-height**:
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- Tight (display): <value>
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- Normal (body): <value>
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- Relaxed (long-form): <value>
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- **Letter-spacing** *(if customized)*: <values per size class>
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## Spacing
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- **Base unit**: <4px | 8px>
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- **Scale (in base units)**: 0, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24
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- See `tokens.ts` `spacing` for px values.
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## Radii
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- `sm`, `md`, `lg`, `pill`, `full` — values in `tokens.ts`.
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- **Posture**: <sharp | tight | medium | pillowy | mixed>
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- `sm` <px> · `md` <px> · `lg` <px> · `pill` 9999px · `full` 9999px
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## Shadows
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## Shadows & elevation
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- `xs / sm / md / lg / xl` — values in `tokens.ts`.
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- (Or: "flat — no shadows" if the posture is flat.)
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- **Posture**: <flat | subtle | generous>
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- Scale: `xs / sm / md / lg / xl` — see `tokens.ts` `shadow`
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- (Or "no shadows in this system" if posture is flat — use borders for elevation hierarchy.)
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## Density
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- **Default**: <comfortable | cozy | compact>
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- **Padding tokens**: see `tokens.ts` `padding` — `tight / default / loose`
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- **Component impact**: list components whose default density differs from the global default.
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## Visual motion
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- **Default duration**: <ms>
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- **Default easing**: <named curve or cubic-bezier>
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- **Default duration**: <ms> (token: `motion.duration.default`)
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- **Default easing**: <named curve> (token: `motion.easing.standard`)
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- **Reduced-motion fallback**: linear, instant where appropriate
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Behavioral motion (when things animate, what does and doesn't) lives
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in the interaction-design skill.
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Behavioral motion (when things animate, what triggers them) is in the
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**interaction-design** skill, not here.
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## Accessibility tokens
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- **Focus ring**: <style — solid 2px brand at 60% opacity / etc.>
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- **Focus ring color token**: `color.focus`
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- **Focus offset**: <px>
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- **Hit-target minimum**: 44×44px (mobile) / 32×32px (desktop pointer)
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- **Contrast targets**: WCAG <AA | AAA> — body 4.5:1, UI 3:1
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## Components
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See `components.md` in this directory for the full vocabulary and
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anatomy. The TL;DR list:
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See `components.md` in this directory for the full vocabulary, anatomy,
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and state coverage. The TL;DR list of primitives:
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- Button (primary / secondary / ghost / destructive / link)
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- Input (text / textarea / select / checkbox / radio / toggle)
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- Card / Surface
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- (project-specific components from `ia.md`)
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- **Button** (primary / secondary / ghost / destructive / link)
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- **Input** (text / textarea / select / checkbox / radio / toggle)
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- **Card / Surface**
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- **Badge / Tag**
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- **Avatar**
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- **Tooltip**
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- **Modal / Drawer / Popover** *(behavioral patterns in interaction-design skill)*
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- **Tabs**
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- **Menu / Dropdown**
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- **Toast / Notification**
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Plus project-specific components from `ia.md`: see `components.md`.
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## Theming variants
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- **Multi-brand / tenant theming**: <yes | no — typically no for v1>
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- **Theme-switching mechanism** *(if applicable)*: <CSS variables / data-theme attr / etc.>
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## TBD on return
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- <TBD: anything the placeholder pass couldn't answer>
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<!-- Any phases that were skipped or had unanswered questions in the
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ui-system interview. This is the worklist for the next pass. -->
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- <TBD: ...>
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