Argument	Type	Filename Pattern
`mockup`	UI mockup (high-fidelity)	`mockup-{name}.html`
`wireframe`	Wireframe (low-fidelity, hand-drawn style)	`wireframe-{name}.html`
`erd`	ERD	`erd-{name}.html`
`flow`	Flowchart / Sequence diagram	`flow-{name}.html`
`chart`	Data chart	`chart-{name}.html`
`slides`	Presentation	`slides-{name}.html`
`arch`	Architecture diagram	`arch-{name}.html`
`dashboard`	Composite dashboard	`dashboard-{name}.html`
`timeline`	Timeline / Gantt chart	`timeline-{name}.html`
`mindmap`	Mindmap	`mindmap-{name}.html`
`kanban`	Kanban board	`kanban-{name}.html`
`table`	Interactive data table	`table-{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

Identify type + target. Ask if ambiguous. Read the file if a path is provided.
Context gathering decision. Determine if project context is needed. If so, read relevant code/docs.
Read references/common-rules.md. Review common principles, aesthetics, CDN, and error prevention rules.
Read references/html-boilerplate.md. Start from the base HTML template.
Generate HTML following the type-specific guide.
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
Instruct to open {filename}.

html-visual

Input

Instructions

Type Determination