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Design a UI component spec to the house quality bar — anatomy, variants, sizes, the 8 states, token mapping, and accessibility. Use when the user wants to design or document a component (button, input, tabs, toast, combobox, date picker, modal, etc.) at the spec level before or a
Design a UI component spec to the house quality bar — anatomy, variants, sizes, the 8 states, token mapping, and accessibility. Use when the user wants to design or document a component (button, input, tabs, toast, combobox, date picker, modal, etc.) at the spec level before or alongside code. For generating framework code, use design-code.
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Produce a complete component specification matching the project format.
.claude/rules/components.md → "Component Quality Bar" (the 8-state table) and "Atomic Design"; the always-on 8-state table is in CLAUDE.md → Non-Negotiables.components/atoms.md, molecules.md, organisms.md, templates.md, navigation.md, feedback.md, forms-advanced.md, overlays.md. Match the existing spec format.accessibility/aria-patterns.md and contrast/target rules from accessibility/wcag-checklist.md.tokens/*.json) — sizes via sizing.json, states via states.json.taste/design-taste.md (states, focus, no slop).python3 scripts/scaffold_component.py "<Name>" to emit a stub, then fill it in.Spec with: anatomy diagram, variants table, sizes table, all 8 applicable states, token mapping, accessibility (role/keyboard/SR), and a note to render via frameworks/adapter-protocol.md.
A component is only "correct" when every variant × state renders right — not just the resting default. Build a states harness: render the component in each applicable state (default, hover, focus, active, disabled, loading aria-busy, error aria-invalid, selected aria-pressed/aria-selected) × each variant in one HTML file (see examples/component-states/button.html). Then RUN the gates and report their real output (CLAUDE.md → Verification Protocol):
node scripts/verify_states.mjs <harness> [--dark] — contrast of every element in default/hover/focusnode scripts/axe_audit.mjs <harness> [--dark] — ARIA/role/name/label correctnessnode scripts/measure_render.mjs <harness> [--dark] — every text element AAnode scripts/verify_focustrap.mjs <harness> --open=<trigger>
Every state must pass in light AND dark before the component is "done". Never claim a state is correct without a gate proving it.The contrast/axe gates pass while the UI is still visibly broken: a checkbox that doesn't toggle, a dash sitting at the bottom of its box, a checkmark and an indeterminate dash with mismatched stroke weight, a control that's too heavy. You must screenshot the harness and inspect it before claiming done — for every state, and after interaction. Playwright + system Chrome:
const b = await chromium.launch({channel:'chrome'});
const p = await b.newPage({deviceScaleFactor:4});
await p.goto('file://'+abs); await p.addStyleTag({content:'*{transition:none!important}'});
await p.mouse.move(2000,2000); // park pointer OFF the component
await p.locator('.stack').first().screenshot({path:'/tmp/x.png'});
Read the PNG. Then look for, specifically:
await loc.click(); expect(await loc.isChecked())). A custom control whose overlay box covers the real <input> will not toggle unless the box has pointer-events:none (or an enclosing <label> forwards the click).display:grid box holds an opacity:0 sibling plus a ::after, the pseudo lands in row 2 → use display:none on the hidden sibling, or one container child.<svg>, two <path> toggled by state — same stroke-width), never an svg check vs a CSS ::after rect (they read as different weights).Consistency across files is non-negotiable. The same component (e.g. checkbox) must use byte-identical CSS + markup in every harness/page. A checkbox that looks thin in form-controls and heavy (native accent-color) in data-table is a bug. Factor one pattern, reuse it verbatim.
Real <input> underneath (keeps native a11y + keyboard); a drawn .box overlay with pointer-events:none; check + dash as two <path> in one <svg> toggled by :checked / :indeterminate; 1.5px border-strong, .25rem radius, .62rem glyph, stroke-width:2 round caps. Reference: examples/component-states/form-controls.html and data-table.html (select-all uses indeterminate). Native accent-color renders too heavy — do not use it when the house look is "thin".
Build mobile-first; a fixed-px width that can't shrink is a bug. Run node scripts/verify_responsive.mjs <file|dir> — it loads each harness at 280/320/414px and fails on any horizontal overflow. The four recurring causes and their fixes:
inline-size:Npx → inline-size:100%;max-inline-size:Npx (cap, don't pin).<ul>/<ol> default 40px inline-start padding (a *{margin:0} reset does NOT clear padding) → padding:0;margin:0 on every list. This also silently mis-aligns a list's edge vs a sibling block (looks like unequal widths) — same fix.flex-wrap:wrap, or for tabs overflow-x:auto + .tab{flex:none}.grid minmax(Npx,1fr) min larger than viewport → minmax(min(Npx,100%),1fr).Timing/easing are tokens (--duration-fast|normal|slow, --ease-out|in|in-out|emphasized in the theme; --transition-micro = fast ease-out). Never hardcode ms/curves. A component that toggles open/closed must animate its height, not just rotate a chevron — collapse via hidden/display:none alone reads as "rigid, no transition". Smooth-height pattern (no JS measuring): wrap content in an inner that clips overflow, animate the grid track:
.panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--duration-normal) var(--ease-emphasized)}
.panel.open{grid-template-rows:1fr}
.panel > .inner{overflow:hidden;min-block-size:0}
Keep a11y: expand = remove hidden then add .open next frame; collapse = remove .open, set hidden on transitionend. Reference: accordion in examples/component-states/overlays.html. Always honor @media(prefers-reduced-motion:reduce){…transition:none}.
auto-fit, never auto-fill for card grids. auto-fill keeps empty phantom tracks so 3 cards cluster left with a void on the right; auto-fit collapses empties so cards stretch to fill the row. Always repeat(auto-fit,minmax(min(Npx,100%),1fr)).align-items:stretch on the grid, AND make the shorter panel's body fill — .panel{display:flex;flex-direction:column} + the inner region flex:1. A child sized with block-size:% (e.g. chart bars) needs a definite-height ancestor (a flex:1 box or explicit height), or the % resolves to 0 and the element collapses. Wrap the bar in a flex:1 .barbox and give the bar block-size:% of that.flex:1 capped by max-inline-size stops growing and leaves empty space after the last item. Push the right-hand cluster with margin-inline-start:auto on its first element.display:block so opening the sidebar pushes main down. Reference: examples/component-states/app-shell.html.Hand-approximated SVG path data renders as broken glyphs (a help "?" became a dot; settings became a hamburger). Use verbatim lucide paths, referenced by name via an injected <symbol> sprite — examples/component-states/icons.js defines each icon once and <svg class="ico" aria-hidden="true"><use href="#i-NAME"/></svg> uses it. No per-use path duplication, no network, offline + gate-safe. Add a new icon to icons.js once; never paste raw paths into markup. (Inline lucide is acceptable only if the path is copied verbatim from lucide.) .ico{stroke:currentColor;fill:none;stroke-width:2} — color via currentColor.
A no-text control (carousel dot, kebab, icon button) is held to 3:1 (WCAG 1.4.11), not 4.5 — verify_states applies this automatically when an element has no direct text node. Two traps it catches:
<button> keeps the UA color:buttontext (≈black) regardless of theme → set its color to the actual indicator color and drive the visual via currentColor (e.g. dot is a ::before{background:currentColor}), so the gate measures the real thing.--color-chart-N, --color-surface-brand) invert between light/dark; white text or a teal indicator on them passes in one mode and fails the other. Use dark-aware values (override in [data-theme="dark"]) or stable tokens (--color-action-primary, --color-text-link which adapts) for avatars, active dots, and selected states.name: design-component description: Design a UI component spec to the house quality bar — anatomy, variants, sizes, the 8 states, token mapping, and accessibility. Use when the user wants to design or document a component (button, input, tabs, toast, combobox, date picker, modal, etc.) at the spec level before or alongside code. For generating framework code, use design-code. invocation: model
---
name: design-component
description: Design a UI component spec to the house quality bar — anatomy, variants, sizes, the 8 states, token mapping, and accessibility. Use when the user wants to design or document a component (button, input, tabs, toast, combobox, date picker, modal, etc.) at the spec level before or alongside code. For generating framework code, use design-code.
invocation: model
---
# Skill: Design Component
Produce a complete component specification matching the project format.
## Steps
1. Read `.claude/rules/components.md` → "Component Quality Bar" (the 8-state table) and "Atomic Design"; the always-on 8-state table is in `CLAUDE.md` → Non-Negotiables.
2. Check if it already exists: `components/atoms.md`, `molecules.md`, `organisms.md`, `templates.md`, `navigation.md`, `feedback.md`, `forms-advanced.md`, `overlays.md`. Match the existing spec format.
3. Pull the ARIA pattern from `accessibility/aria-patterns.md` and contrast/target rules from `accessibility/wcag-checklist.md`.
4. Map every value to tokens (`tokens/*.json`) — sizes via `sizing.json`, states via `states.json`.
5. Apply visual judgment from `taste/design-taste.md` (states, focus, no slop).
6. Optional fast start: `python3 scripts/scaffold_component.py "<Name>"` to emit a stub, then fill it in.
## Output
Spec with: anatomy diagram, variants table, sizes table, all 8 applicable states, token mapping, accessibility (role/keyboard/SR), and a note to render via `frameworks/adapter-protocol.md`.
## Accuracy — verify every state, don't assume (mandatory when code is produced)
A component is only "correct" when **every variant × state** renders right — not just the resting default. Build a **states harness**: render the component in each applicable state (default, hover, focus, active, disabled, loading `aria-busy`, error `aria-invalid`, selected `aria-pressed`/`aria-selected`) × each variant in one HTML file (see `examples/component-states/button.html`). Then RUN the gates and report their real output (CLAUDE.md → Verification Protocol):
- `node scripts/verify_states.mjs <harness> [--dark]` — contrast of every element in default/hover/focus
- `node scripts/axe_audit.mjs <harness> [--dark]` — ARIA/role/name/label correctness
- `node scripts/measure_render.mjs <harness> [--dark]` — every text element AA
- overlays/modals also: `node scripts/verify_focustrap.mjs <harness> --open=<trigger>`
Every state must pass in light AND dark before the component is "done". Never claim a state is correct without a gate proving it.
## Gates prove contrast/a11y — they do NOT prove pixels. RENDER AND LOOK.
The contrast/axe gates pass while the UI is still visibly broken: a checkbox that doesn't toggle, a dash sitting at the bottom of its box, a checkmark and an indeterminate dash with mismatched stroke weight, a control that's too heavy. **You must screenshot the harness and inspect it** before claiming done — for every state, and after interaction. Playwright + system Chrome:
```js
const b = await chromium.launch({channel:'chrome'});
const p = await b.newPage({deviceScaleFactor:4});
await p.goto('file://'+abs); await p.addStyleTag({content:'*{transition:none!important}'});
await p.mouse.move(2000,2000); // park pointer OFF the component
await p.locator('.stack').first().screenshot({path:'/tmp/x.png'});
```
Read the PNG. Then look for, specifically:
- **Functional**: click each interactive element and assert the state actually changed (`await loc.click(); expect(await loc.isChecked())`). A custom control whose overlay box covers the real `<input>` will not toggle unless the box has `pointer-events:none` (or an enclosing `<label>` forwards the click).
- **Geometry**: glyphs centered, not stacked/offset. If a `display:grid` box holds an `opacity:0` sibling plus a `::after`, the pseudo lands in row 2 → use `display:none` on the hidden sibling, or one container child.
- **Stroke consistency**: a checkmark and its indeterminate dash must use the **same** rendering method (one `<svg>`, two `<path>` toggled by state — same `stroke-width`), never an svg check vs a CSS `::after` rect (they read as different weights).
- **Transition artifact**: screenshot WITHOUT disabling transitions and a just-clicked control looks half-faded mid-animation — that is not a bug. Always disable transitions and park the pointer before judging a state.
**Consistency across files is non-negotiable.** The same component (e.g. checkbox) must use byte-identical CSS + markup in every harness/page. A checkbox that looks thin in `form-controls` and heavy (native `accent-color`) in `data-table` is a bug. Factor one pattern, reuse it verbatim.
### Verified custom checkbox/radio pattern (thin, token-driven, gated + eyeballed)
Real `<input>` underneath (keeps native a11y + keyboard); a drawn `.box` overlay with `pointer-events:none`; check + dash as two `<path>` in one `<svg>` toggled by `:checked` / `:indeterminate`; 1.5px `border-strong`, `.25rem` radius, `.62rem` glyph, `stroke-width:2` round caps. Reference: `examples/component-states/form-controls.html` and `data-table.html` (select-all uses `indeterminate`). Native `accent-color` renders too heavy — do not use it when the house look is "thin".
## Responsive — every component, no sideways scroll (gated)
Build mobile-first; a fixed-px width that can't shrink is a bug. Run `node scripts/verify_responsive.mjs <file|dir>` — it loads each harness at 280/320/414px and fails on any horizontal overflow. The four recurring causes and their fixes:
- **fixed `inline-size:Npx`** → `inline-size:100%;max-inline-size:Npx` (cap, don't pin).
- **`<ul>`/`<ol>` default 40px inline-start padding** (a `*{margin:0}` reset does NOT clear padding) → `padding:0;margin:0` on every list. This also silently mis-aligns a list's edge vs a sibling block (looks like unequal widths) — same fix.
- **non-wrapping flex rows** (breadcrumb, stepper, tabs) → `flex-wrap:wrap`, or for tabs `overflow-x:auto` + `.tab{flex:none}`.
- **`grid minmax(Npx,1fr)` min larger than viewport** → `minmax(min(Npx,100%),1fr)`.
## Motion — tokenized, real easing, animate the thing that moves
Timing/easing are tokens (`--duration-fast|normal|slow`, `--ease-out|in|in-out|emphasized` in the theme; `--transition-micro` = `fast ease-out`). Never hardcode ms/curves. A component that toggles open/closed must animate its **height**, not just rotate a chevron — collapse via `hidden`/`display:none` alone reads as "rigid, no transition". Smooth-height pattern (no JS measuring): wrap content in an inner that clips overflow, animate the grid track:
```css
.panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--duration-normal) var(--ease-emphasized)}
.panel.open{grid-template-rows:1fr}
.panel > .inner{overflow:hidden;min-block-size:0}
```
Keep a11y: expand = remove `hidden` then add `.open` next frame; collapse = remove `.open`, set `hidden` on `transitionend`. Reference: accordion in `examples/component-states/overlays.html`. Always honor `@media(prefers-reduced-motion:reduce){…transition:none}`.
## Layout — fill the space, don't ship AI-empty filler
- **`auto-fit`, never `auto-fill`** for card grids. `auto-fill` keeps empty phantom tracks so 3 cards cluster left with a void on the right; `auto-fit` collapses empties so cards stretch to fill the row. Always `repeat(auto-fit,minmax(min(Npx,100%),1fr))`.
- **Equal-height panels in a row**: `align-items:stretch` on the grid, AND make the shorter panel's body fill — `.panel{display:flex;flex-direction:column}` + the inner region `flex:1`. A child sized with `block-size:%` (e.g. chart bars) needs a **definite-height** ancestor (a `flex:1` box or explicit height), or the % resolves to 0 and the element collapses. Wrap the bar in a `flex:1` `.barbox` and give the bar `block-size:%` of that.
- **A main region that's 80% whitespace reads as machine-generated.** Fill a dashboard with real, plausible content (stats row + activity list + a chart), not one lonely widget. Intentional density is the difference between "designed" and "AI slop".
- **Trailing gap in a toolbar/header**: a flex item with `flex:1` capped by `max-inline-size` stops growing and leaves empty space *after* the last item. Push the right-hand cluster with `margin-inline-start:auto` on its first element.
- **Mobile nav must not overlap.** Putting the sidebar and main in the same grid area makes an opened sidebar paint over content. On mobile switch the shell to `display:block` so opening the sidebar pushes main *down*. Reference: `examples/component-states/app-shell.html`.
## Icons — real lucide, referenced by name (never hand-draw paths)
Hand-approximated SVG path data renders as broken glyphs (a help "?" became a dot; settings became a hamburger). Use **verbatim lucide** paths, referenced by name via an injected `<symbol>` sprite — `examples/component-states/icons.js` defines each icon once and `<svg class="ico" aria-hidden="true"><use href="#i-NAME"/></svg>` uses it. No per-use path duplication, no network, offline + gate-safe. Add a new icon to `icons.js` once; never paste raw paths into markup. (Inline lucide is acceptable only if the path is copied verbatim from lucide.) `.ico{stroke:currentColor;fill:none;stroke-width:2}` — color via `currentColor`.
## Graphical / icon-only controls (3:1, theme-stable)
A no-text control (carousel dot, kebab, icon button) is held to **3:1** (WCAG 1.4.11), not 4.5 — `verify_states` applies this automatically when an element has no direct text node. Two traps it catches:
- An empty `<button>` keeps the UA `color:buttontext` (≈black) regardless of theme → set its `color` to the actual indicator color and drive the visual via `currentColor` (e.g. dot is a `::before{background:currentColor}`), so the gate measures the real thing.
- **Theme-flipping tokens** (`--color-chart-N`, `--color-surface-brand`) invert between light/dark; white text or a teal indicator on them passes in one mode and fails the other. Use **dark-aware** values (override in `[data-theme="dark"]`) or **stable** tokens (`--color-action-primary`, `--color-text-link` which adapts) for avatars, active dots, and selected states.
Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Avoid automatic install
License: MIT
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
Version reported in registry metadata; check source releases before relying on it.
Quality
73/100
Strong
Trust
66/100
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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"installSuccessRate": null,
"successRate": null,
"recentSuccessRate": null,
"recentFailureRate": null,
"riskBlocked": 0,
"setupRequired": 0,
"notRelevant": 0,
"avgOutputQuality": null,
"avgTimeToUsefulMs": null,
"productionOutcomes": 0,
"humanReviewRequired": 0,
"uniqueAgents": 0,
"lastOutcomeAt": null
},
"signals": [],
"penalties": [
"No real agent outcome evidence yet"
]
},
"audit": {
"score": 78,
"risk_level": "needs_review",
"risk_label": "Needs review",
"warnings": [
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"AI review approval is missing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"Dependency/runtime risk: command execution surface, credential or environment access",
"Permission surface: secrets or environment access, shell or command execution",
"Review status: AI review approval is missing"
]
},
"safety_gate": {
"tier": "blocked",
"label": "Blocked for auto-install",
"auto_install_policy": "block",
"auto_install_allowed": false,
"human_review_required": true,
"blocked": true,
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
},
"quality": {
"score": 73,
"label": "Strong"
},
"supply": {
"track": "Research and knowledge work",
"scenario": "RAG and knowledge",
"maintenance": "2d since push",
"risk": "Needs review"
},
"alternative_skills": [
{
"slug": "yanliudesign-mono-color-skill",
"name": "mono-color",
"url": "https://www.openagentskill.com/skills/yanliudesign-mono-color-skill",
"stars": 1919,
"install_command": "npx skills add yanliudesign/mono-color-skill --skill mono-color",
"trust_score": 85,
"audit_score": 93
}
],
"do_not_use_when": [
"teams that need a vendor-supported SLA",
"high-compliance environments without internal security review",
"No OpenAgentSkill engagement data yet",
"High-risk permission hints: Shell or command execution, Secrets or environment access",
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"AI review approval is missing",
"Quality score needs review"
],
"agent_contract": {
"task_input": "Use design-component in an agent workflow",
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
"install_policy": "block",
"minimum_review_before_use": [
"Trust: 74/100 Strong shortlist",
"Audit: 78/100 Needs review",
"Safety: 34/100 Avoid automatic install",
"Review repository, license, install command, and permission surface before production use."
],
"expected_agent_output": {
"selected_skill": "plugin87-design-component (design-component)",
"install_command": "npx skills add plugin87/ux-ui-agent-skills --skill design-component",
"risk_summary": "Needs review; Blocked for auto-install; Review before production",
"verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
}
},
"outcome_feedback": {
"endpoint": "https://www.openagentskill.com/api/agent/outcome",
"method": "POST",
"requires_resolve_event_id": true,
"event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
"expected_outcomes": [
"success",
"failed",
"not_relevant",
"blocked_by_risk",
"setup_required"
],
"payload_template": {
"event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
"skill_slug": "plugin87-design-component",
"task": "Use design-component in an agent workflow",
"agent": "codex",
"outcome": "success",
"install_used": true,
"risk_blocked": false,
"setup_required": false,
"task_success": true,
"output_quality": 4,
"error_type": null,
"human_review_required": false,
"workspace": "sandbox",
"time_to_useful_ms": 120000,
"notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
}
},
"endpoints": {
"web": "https://www.openagentskill.com/skills/plugin87-design-component",
"api": "https://www.openagentskill.com/api/agent/skills/plugin87-design-component",
"audit": "https://www.openagentskill.com/skills/plugin87-design-component/audit",
"eval": "https://www.openagentskill.com/api/agent/evals?slug=plugin87-design-component&task=Use%20design-component%20in%20an%20agent%20workflow&max_risk=medium",
"resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20design-component%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
"receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20design-component%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
"install": "https://www.openagentskill.com/api/skills/plugin87-design-component/install",
"manifest": "https://www.openagentskill.com/api/registry/manifest/plugin87-design-component"
}
}Listing source
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Sandbox only
Audit
78/100
Needs review
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.