Grid Dashboard

Build visual dashboards rendered in the artifact panel via preview_grid_dashboard. The agent writes a YAML file defining pages of grid cells; the MCP App renders them with a page selector.

(IMPORTANT): Include all analysis findings in the dashboard — do not omit relevant insights, metrics, or supporting facts. Build incrementally (see "Building YAML Incrementally" below).

YAML Structure

The YAML is page-based: top-level pages object where each key is a page identifier (e.g., URL, label) and each value defines a grid with cells.

pages:
  "Page A":
    title: "Page A Dashboard"        # optional — shown as header
    description: "Brief description"  # optional — shown below title
    grid:
      columns: 3                     # number of columns
      rows: 3                        # number of rows
    cells:
      - pos: "1-1"                   # row-column (1-based)
        type: kpi                    # cell type
        title: "Cell Title"          # optional — uppercase label above content
        kpi:                         # type-specific config
          value: "1,234"
          change: "+12%"
          trend: up

  "Page B":
    title: "Page B Dashboard"
    grid:
      columns: 4
      rows: 8
    cells:
      - pos: "1-1"
        type: kpi
        # ...

The UI renders a select box at the top to switch between pages.

Building YAML Incrementally

CRITICAL: Large dashboards MUST be built incrementally. Do NOT attempt to write the entire YAML in a single tool call — this causes output truncation mid-generation.

Multi-page dashboards — build one page at a time:

1. Write the file with pages: header and the first page's complete grid + cells
2. Edit the file to append the next page
3. Repeat step 2 until all pages are written
4. Call preview_grid_dashboard once at the end

Single pages with many cells (12+ rows) — build in row batches:

1. Write the file with pages: header, grid config, and the first 4–6 rows of cells
2. Edit to append the next 4–6 rows at the end of the cells array
3. Repeat until all rows are written
4. Call preview_grid_dashboard once at the end

Each tool call should produce a manageable amount of YAML. Never write more than ~6 grid rows in a single tool call.

Grid Layout

This is NOT a CSS framework 12-column grid (like Bootstrap). columns is the literal number of columns displayed. If you want 3 columns, set columns: 3 — do NOT set columns: 12 and merge cells to simulate 3 columns. The tool validates cell positions and will return errors for invalid formats.

• grid.columns and grid.rows must be numbers matching the actual cell count (not strings, not auto). Do not declare more rows/columns than cells occupy
• pos: "row-col" — 1-based coordinates (e.g., "1-1" = top-left)
• Cell merging: pos: ["1-1", "1-3"] merges from row 1 col 1 to row 1 col 3. MUST be a YAML array of two strings
• Each row has a fixed height range (120px–360px) — do not overfill cells
• Horizontal merging is useful — tables and charts benefit from full-width display (e.g., pos: ["3-1", "3-4"])
• Vertical merging is rarely needed — each row is at least 120px tall, so spanning 3 rows creates 360px+ of height, which is excessive for most content. Only merge vertically for very long markdown or tables with many rows. In most cases, let each cell occupy a single row.

Correct pos format:

pos: "1-1"              # single cell at row 1, column 1
pos: ["1-1", "1-3"]     # merged cell from (1,1) to (1,3)
pos: ["3-1", "5-4"]     # merged cell spanning rows 3-5 and columns 1-4

WRONG — these will cause tool errors:

pos: "1-1:1-3"          # ✗ colon separator
pos: "1-1to1-3"         # ✗ "to" separator
pos: "1-1,1-3"          # ✗ comma in string
pos: [1, 1]             # ✗ numbers instead of "row-col" strings

Common grid sizes:

• 3×3 — compact overview (9 cells)
• 4×4 — standard dashboard (16 cells)
• 4×6 — detailed analysis with tables (24 cells)

Cell Types

kpi — Metric Card

Large number with optional trend indicator. Use for headline metrics in the top row.

- pos: "1-1"
  type: kpi
  title: "Total Revenue"
  kpi:
    value: "$1.2M"          # string or number — displayed large
    change: "+15.3%"         # optional — shown below value
    trend: up                # optional — up | down | flat (colors the change)
    subtitle: "vs. last quarter"  # optional — small text below change

gauge — Half-Circle Meter

Score visualization with color thresholds. Use for scores, completion rates, health indicators.

- pos: "2-1"
  type: gauge
  title: "Health Score"
  gauge:
    value: 72                # current value
    max: 100                 # maximum value
    label: "B"               # optional — displayed in center (defaults to value)
    thresholds:              # optional — color breakpoints (use hex values, NOT color names)
      - { limit: 40, color: "#ef4444" }
      - { limit: 70, color: "#f59e0b" }
      - { limit: 100, color: "#22c55e" }

scores — Progress Bar List

Labeled horizontal bars showing value/max ratios. Use for dimension breakdowns, skill assessments, category comparisons.

- pos: "2-2"
  type: scores
  title: "Score Breakdown"
  scores:
    - label: "Content Structure"
      value: 14
      max: 26
    - label: "Structured Data"
      value: 8
      max: 26
    - label: "E-E-A-T Signals"
      value: 16
      max: 21

Bar colors: green (≥75%), yellow (40–74%), red (<40%).

table — Sortable Table

Structured data with click-to-sort columns. Two formats accepted:

Format 1 — Flat arrays (compact):

- pos: ["3-1", "3-4"]            # merged across columns 1-4
  type: table
  title: "Top Keywords"
  table:
    headers: ["Keyword", "Position", "Impressions", "CTR"]
    rows:
      - ["what is cdp", 11.2, 1840, "1.8%"]
      - ["cdp vs dmp", 8.5, 920, "3.2%"]
    sortable: true           # optional — defaults to true

Format 2 — Column definitions (readable, preferred for many columns):

- pos: "3-1"
  type: table
  title: "Top Keywords"
  table:
    columns:
      - key: query
        label: "Keyword"
      - key: position
        label: "Position"
      - key: impressions
        label: "Impressions"
      - key: ctr
        label: "CTR"
    rows:
      - query: "what is cdp"
        position: 11.2
        impressions: 1840
        ctr: "1.8%"
      - query: "cdp vs dmp"
        position: 8.5
        impressions: 920
        ctr: "3.2%"
    sortable: true

chart — Chart.js Chart

Pass standard Chart.js config (type, data, options).

Standard types: bar, line, pie, doughnut, radar, polarArea, bubble, scatter

Plugin types (also available): sankey, treemap, matrix, wordCloud, candlestick, ohlc

YAML constraint: Never use JS function strings for callbacks or scriptable options — they are passed as plain strings and will be stripped. Use declarative alternatives:

• treemap: Set key to specify the value field. Put backgroundColor and label inside each tree item (not at dataset level). Use labels: { display: true } to show labels.
• matrix: Data uses {x, y, v}. Width, height, scales, and tooltip are auto-configured. For multi-color heatmaps, use colorScale on the dataset: colorScale: [{limit: 20, color: "#3b82f6"}, {limit: 50, color: "#10b981"}, ...]. Omit for single-color alpha gradient from backgroundColor.

- pos: "3-2"
  type: chart
  title: "Traffic Trend"
  chart:
    type: line
    data:
      labels: ["Jan", "Feb", "Mar", "Apr"]
      datasets:
        - label: "Impressions"
          data: [1200, 1900, 3000, 2500]
          borderColor: "#4a6cf7"
          fill: false
    options:                 # optional — Chart.js options
      scales:
        y:
          beginAtZero: true

markdown — Rich Text

GFM markdown content. Use content or markdown key — must be a top-level string, NOT a nested object.

- pos: "4-1"
  type: markdown
  title: "Summary"
  content: |
    ### Key Finding
    **Impact**: High — content depth is 1/6 of competitors

WRONG — markdown.content nested object will cause a tool error:

  markdown:
    content: |       # ✗ nested under markdown — must be a top-level key
      Some text

Rendering

Write the YAML file and call:

preview_grid_dashboard({ file_path: "/absolute/path/to/dashboard.yaml" })

The dashboard renders in the artifact panel with light/dark theme support and a page selector dropdown.

Fallback (No Artifact Panel)

When preview_grid_dashboard is not available (CLI mode), output the same information as formatted markdown instead.

Layout Tips

• KPIs in row 1: Place 3–4 KPI cells across the top for at-a-glance metrics
• Gauges + scores in row 2: Pair a gauge with a scores breakdown
• Full-width tables: Merge across all columns with pos: ["3-1", "3-4"] for data tables
• Mixed rows: Split a row into halves (e.g., table on left, markdown on right)
• Keep rows balanced: Avoid putting a large table next to a small KPI in the same row