MCPInstall

html-visual

Generate an interactive single-file HTML visualization — mockup, wireframe, ERD, flowchart, chart, slides, architecture diagram, dashboard, timeline, mindmap, kanban, or table. Use when the user wants something rendered rather than described: a UI mockup or wireframe, a database schema as an ERD, business logic as a flowchart, data as a chart, or content as slides. Also use when they point at a file (schema, spec, data) and ask to see it visualized.

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/2ykwang/agent-skills --skill html-visual
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads html-visual automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

HTML Visualization

Input

$ARGUMENTS

Instructions

Visualize the user's request as an interactive single HTML file. First, read references/common-rules.md to review common rules.

Type Determination

Determine the type from the first word of $ARGUMENTS.

ArgumentTypeFilename Pattern
mockupUI mockup (high-fidelity)mockup-{name}.html
wireframeWireframe (low-fidelity, hand-drawn style)wireframe-{name}.html
erdERDerd-{name}.html
flowFlowchart / Sequence diagramflow-{name}.html
chartData chartchart-{name}.html
slidesPresentationslides-{name}.html
archArchitecture diagramarch-{name}.html
dashboardComposite dashboarddashboard-{name}.html
timelineTimeline / Gantt charttimeline-{name}.html
mindmapMindmapmindmap-{name}.html
kanbanKanban boardkanban-{name}.html
tableInteractive data tabletable-{name}.html

No match: Infer the type from the request content. If unable to infer, ask the user. When inferred, use visual-{name}.html as the filename.

{name} rule: Extract the core noun from the request and convert to kebab-case. e.g., "user login form" → login-form, "payment flow" → payment-flow.

Input Handling

  • File path provided: Read and analyze the file, then visualize. e.g., /html-visual erd schema.prisma → Analyze the Prisma schema to auto-generate ERD
  • Existing HTML modification: Read and modify the existing file. Do not recreate from scratch.
  • Natural language only: Infer the type, then generate.

Context Gathering

  • Description is sufficient: Generate immediately (e.g., "simple login form mockup")
  • Project code reference needed: Read code/schema/API first (e.g., "our project's ERD", "current payment flow")
  • Criterion: If the request contains project context references like "our", "current", "project's", read the code first.

Type-Specific Guides

mockup

  • Device frame: Actual device frame shape for mobile/tablet UI
  • Multiple screens: Side-by-side layout + screen labels
  • Placeholder data: Realistic data matching project context
  • Tab/swipe for screen transitions

wireframe

  • Hand-drawn (sketch) style: Slightly irregular lines, hand-drawn feel
  • Black-and-white or grayscale. Minimal color
  • Text areas shown as gray blocks (no "Lorem ipsum")
  • Focus on layout and information structure, exclude visual details

erd

  • Entity boxes with attribute lists. Distinguish PK/FK
  • Relationship lines: 1:1, 1:N, N:M notation. Auto-track on node drag
  • Include relationship type legend

flow

  • Node types: Start/End (circle), Process (rectangle), Decision (diamond)
  • Directional arrows. Auto-track on node drag
  • Display branch conditions on connection lines

chart

  • Auto-select appropriate chart type for the data (bar, line, pie, scatter, etc.)
  • Axis labels + units, hover tooltips, legend
  • Use Chart.js or D3.js

slides

  • Reveal.js CDN-based
  • Slide transition animations
  • Code block highlighting (highlight.js)
  • Speaker notes support (toggle with S key)

arch

  • Separate system components by layer/zone (Frontend / Backend / DB / External)
  • Label communication lines with protocols (HTTP, gRPC, pub/sub, etc.)
  • Zoom/pan support
  • D3.js force-directed or direct SVG generation

dashboard

  • Arrange multiple charts/metrics in grid layout
  • KPI cards at the top (numbers + change rates)
  • Cross-chart interaction: Click one → filter others

timeline

  • Horizontal or vertical timeline
  • Event nodes + date labels
  • Zoom/scroll for period navigation
  • Use Mermaid gantt or D3.js

mindmap

  • Radial expansion from center node
  • Node collapse/expand
  • Use Mermaid mindmap or direct SVG generation

kanban

  • Columns: TODO / In Progress / Done (customizable)
  • Drag and drop cards between columns
  • Display labels/tags on cards

table

  • Sort by clicking column headers (ascending/descending)
  • Search/filter at the top
  • Pagination or virtual scroll
  • Cell highlight, row selection

Procedure

  1. Identify type + target. Ask if ambiguous. Read the file if a path is provided.
  2. Context gathering decision. Determine if project context is needed. If so, read relevant code/docs.
  3. Read references/common-rules.md. Review common principles, aesthetics, CDN, and error prevention rules.
  4. Read references/html-boilerplate.md. Start from the base HTML template.
  5. Generate HTML following the type-specific guide.
  6. Validate: Review the generated HTML.
    • No smart quotes (curly quotes) in HTML attributes
    • No unclosed tags
    • No overlapping nodes/elements
    • If issues found, fix and re-validate
  7. Instruct to open {filename}.

FAQ

What does the html-visual skill do?

Generate an interactive single-file HTML visualization — mockup, wireframe, ERD, flowchart, chart, slides, architecture diagram, dashboard, timeline, mindmap, kanban, or table. Use when the user wants something rendered rather than described: a UI mockup or wireframe, a database schema as an ERD, business logic as a flowchart, data as a chart, or content as slides. Also use when they point at a file (schema, spec, data) and ask to see it visualized.

How do I install html-visual?

Run npx skills add https://github.com/2ykwang/agent-skills --skill html-visual in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/html-visual/ (personal) or .claude/skills/html-visual/ (project).

Which AI agents can use html-visual?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is html-visual safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains html-visual?

It is published by 2ykwang in 2ykwang/agent-skills. It has 478 recorded installs.

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