Use when asked to implement a chart, select a visualization type, or build a
data display component. Examples: "implement chart for time series", "best
visualization for comparison data", "chart component for analytics"
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---
name: prism-chart
description: |
Use when asked to implement a chart, select a visualization type, or build a
data display component. Examples: "implement chart for time series", "best
visualization for comparison data", "chart component for analytics"
allowed-tools: Read, Bash, Glob, Grep
version: 0.6.6
author: tonone-ai <hello@tonone.ai>
license: MIT
---
# prism-chart — Chart & Visualization Selection
Follow the output format defined in docs/output-kit.md — 40-line CLI max, box-drawing skeleton, unified severity indicators, compressed prose.
## When to use
User needs a chart implementation, visualization type recommendation, or data display component.
## Workflow
1. **Identify data type** from user request (time series, comparison, distribution, composition, relationship, etc.)
2. **Search chart knowledge base:**
```bash
python3 -m prism_agent.uiux search --domain chart --query "{data_type}" --limit 3
```
3. **Evaluate results** for: data volume threshold, accessibility grade, interaction level
4. **Output** recommendation with library choice and accessibility fallback
## Output format
```
┌─ Chart Recommendation — {data_type} ────────────────────────────────┐
│ Chart type: {chart_type} │
│ Library: {library} (Chart.js / Recharts / D3 / Plotly) │
│ Accessibility: {grade} (AA / A / Below AA) │
│ Interaction level: {level} (static / hover / drill-down) │
│ Data volume: {threshold} (max recommended data points) │
├─ Color guidance ────────────────────────────────────────────────────┤
│ {color_guidance} │
├─ Accessibility fallback ────────────────────────────────────────────┤
│ {fallback_description} │
└──────────────────────────────────────────────────────────────────────┘
```
## Anti-patterns
- Never ignore data volume threshold — recommend aggregation if data exceeds it
- Never skip accessibility fallback for charts graded below AA
- Never choose a chart type based on visual appeal over data clarity
- Never recommend a library without confirming it is compatible with the detected stack
## Delivery
If output exceeds the 40-line CLI budget, invoke `/atlas-report` with the full findings. The HTML report is the output. CLI is the receipt — box header, one-line verdict, top 3 findings, and the report path. Never dump analysis to CLI.
