# microsoft/flint-chart

🪄 Flint is a visualization language that lets AI agents reliably create expressive, good-looking charts from simple, human-editable chart specs.

Repository: https://github.com/microsoft/flint-chart
Canonical: https://ross.abutalabs.com/products/flint-chart
Homepage: https://microsoft.github.io/flint-chart/
Language: TypeScript
License: MIT
License Family: permissive
Topics: ai-agents, data-visualization, charting-library, mcp-server
Last push: 2026-08-26T04:26:04+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 97, longevity 8
- inputs: {"age_days": 113, "days_push": 7, "days_rel": 20, "gap_med": 7, "n_releases_24m": 6}
- flags: young
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3952, forks 219 (observed 2026-08-28T04:08:30.364729+00:00)

## What it is
Flint is a visualization intermediate language and TypeScript library that compiles compact, human-editable chart specs into Vega-Lite, ECharts, Chart.js, Plotly, or Excel-native charts. It also ships an MCP server so AI agents can create, validate, and render polished charts with themes like NYT, Economist, Swiss, and McKinsey.

## Use cases
- have an AI agent generate good-looking charts from a simple spec
- compile a semantic chart spec to Vega-Lite or ECharts
- add chart creation tools to an MCP client like Claude or GitHub Copilot
- render charts in publication themes like Economist or McKinsey
- export editable Excel charts from data
- validate and render charts from a chat or coding environment

## When to choose
- you want AI agents to produce expressive charts without hardcoding verbose layout parameters
- you need one compact spec that targets multiple charting backends
- you want themed, publication-quality visualizations
- you want to expose chart rendering to agents via MCP

## When to avoid
- you need direct low-level control over every charting parameter
- you are not using JavaScript/TypeScript or an MCP-capable agent
- you need chart types outside what the supported backends offer

## Facets
- artifact type: library
- maturity: active
- function: data-visualization, charts, mcp, agent-framework, compiler
- domain: data-visualization, artificial-intelligence, developer-tools
- platform: cross-platform
- tags: charting-library, vega-lite, echarts, chartjs, plotly, excel-charts, visualization-language, semantic-spec, llm-tools, themes, ai-agents, nodejs, web-server

## Member repositories
- microsoft/flint-chart (main) score 80

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:30.364729+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:24:31.470213+00:00, confidence not recorded.
  - readme: https://github.com/microsoft/flint-chart (fetched 2026-08-28T04:08:30.364729+00:00, sha 989d3d803fec)
  - homepage: https://microsoft.github.io/flint-chart/ (fetched 2026-08-29T09:18:12.440101+00:00, sha 98c3eb773424)
  - registry_npm: https://registry.npmjs.org/flint-chart (fetched 2026-08-29T09:18:12.449221+00:00, sha eb28d1cb8d2a)
- Data as of 2026-08-30T08:39:29.467469+00:00.