AgentSkillsCN

design-proposals

以交互式 HTML 模型的形式，生成并呈现多套视觉化的 UX/UI 设计方案。当用户提出设计提案、探索设计方案，或对比不同功能的布局与用户体验创意时，又或是当某项功能需求在正式实施前可通过可视化方式加以验证时，可使用此技能。

SKILL.md
--- frontmatter
name: design-proposals
description: Generate and present multiple visual UX/UI design proposals as interactive HTML mockups. Use when the user asks to propose, explore, or compare designs, layouts, or UX ideas for a feature — or when a feature request could benefit from visual exploration before implementation.

Design Proposals

Generate 2–3 standalone HTML mockups so the user can visually compare UX directions before committing to one. This is a two-phase workflow: first explore via HTML mockups, then implement the chosen direction with real components.

Phase 1 — HTML Mockups (exploration)

Step 1: Understand the project's design language

Before creating any mockup, check if a project design system reference exists:

  1. •Look for .design-proposals/design-system.md in the project root.
  2. •If it exists, read it — it contains the project's colors, fonts, CSS utilities, layout patterns, and example markup ready to reuse in mockups. Skip discovery and go to Step 2.
  3. •If it doesn't exist, discover the design language manually:
    • •Find the global CSS file (e.g., globals.css, index.css, tailwind.config.*) — extract colors, fonts, border radii, and any custom utilities.
    • •Scan 1–2 existing page/layout files to understand overall structure (navigation, spacing, dark/light mode).
    • •Note the component library in use (shadcn, Radix, MUI, Chakra, plain HTML…).
    • •Then offer to create the reference file for future sessions (see "Creating a design system reference" below).

Step 2: Create the mockups

  1. •Create a .design-proposals/ directory at the project root (add it to .gitignore if not already present, along with .screenshots/).
  2. •For each proposal, create a self-contained HTML file:
    • •Name files descriptively: option-a-<short-label>.html, option-b-<short-label>.html, etc.
    • •Use Tailwind CDN (<script src="https://cdn.tailwindcss.com"></script>) for utility classes.
    • •Import the same font the project uses (e.g., Google Fonts link).
    • •Replicate the project's color palette and visual style via inline <style> — match dark/light mode, glass effects, gradients, border styles, etc.
    • •Each file must be fully self-contained (no external dependencies beyond CDN links).
    • •Add a colored annotation banner fixed at the top of each page, briefly describing the design direction (use a distinct color per option so they're easy to tell apart).
    • •Populate with realistic placeholder content relevant to the feature.

Step 3: Present the mockups

  1. •Start a local HTTP server in .design-proposals/:
    code
    python3 -m http.server 8899
    Run it in the background (block_until_ms: 0, full_network permission).
  2. •Open each mockup in the Cursor built-in browser at http://localhost:8899/<filename>.html.
  3. •Resize the browser to 1440×900 before taking screenshots.
  4. •Take a screenshot of each option.
  5. •After all screenshots, provide a structured comparison:
    • •For each option: a short description, best for, and trade-off.
    • •Ask the user which direction they prefer, or if they want to mix elements.

Iteration

When the user requests tweaks to a specific option, edit that HTML file in place and reload the browser. Do not recreate the file from scratch.

Phase 2 — Real implementation (after the user picks a direction)

Once a direction is chosen:

  1. •Create a temporary design route or page in the project (e.g., src/app/(design)/... or equivalent for the framework in use).
  2. •Implement the chosen design using the project's actual components, styles, and data types.
  3. •Let the user validate on the dev server.
  4. •When approved, move the implementation to its final location and clean up design artifacts.

Creating a design system reference

When a project doesn't have a design-system.md yet, offer to create one after the first design session. The file captures everything needed to replicate the project's visual style in standalone HTML mockups.

Store it at .design-proposals/design-system.md (already gitignored alongside the mockups).

The reference should include:

  • •Theme: dark/light mode, background colors (HSL values)
  • •Color palette: primary, secondary, muted, accent, destructive — with exact HSL values from the CSS
  • •Typography: font family, Google Fonts import URL, key sizes
  • •Border & radius: radius values, border colors
  • •Custom utilities: any project-specific CSS like glass effects, gradients, shadows — copy the exact CSS
  • •Layout patterns: typical page structure (e.g., "3-column: filters | main card | sidebar")
  • •Component library: which library is used, key components (Button, Card, etc.)
  • •HTML boilerplate: a ready-to-copy <head> block with all CDN links, font imports, and <style> block so new mockups can be started instantly

Keep the reference concise (under 150 lines). It's a cheat sheet, not full documentation.

Rules

  • •Never use the image generation tool for design proposals — it produces hallucinated UI elements and doesn't match the project's design system.
  • •Always propose 2–3 options, not just one. The value is in comparison.
  • •Each option should represent a fundamentally different UX approach (e.g., side panel vs. full page vs. drawer), not just color or spacing variations.
  • •Keep mockups focused on layout, information hierarchy, and interaction flow — pixel-perfect polish is not the goal at this stage.
  • •Use an opaque (not glass/transparent) background on the drawer/panel containers if the page background is dark — semi-transparent glass is invisible against matching dark backgrounds in standalone mockups.