Image Agent Skill

Image renderer for json-render that turns JSON specs into SVG and PNG images via Satori. Use when working with @json-render/image, generating OG images from JSON, creating social cards, or rendering AI-generated image specs.

718 tokens

context cost

SKILL.md, read when the skill is used

files

instructions only

copies elsewhere

how many repositories repackaged it

15 821

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/vercel-labs/json-render --skill image

The instruction itself

7 sections, as written by the author

@json-render/image

Image renderer that converts JSON specs into SVG and PNG images using Satori.

Quick Start

import { renderToPng } from "@json-render/image/render";
import type { Spec } from "@json-render/core";

const spec: Spec = {
  root: "frame",
  elements: {
    frame: {
      type: "Frame",
      props: { width: 1200, height: 630, backgroundColor: "#1a1a2e" },
      children: ["heading"],
    },
    heading: {
      type: "Heading",
      props: { text: "Hello World", level: "h1", color: "#ffffff" },
      children: [],
    },
  },
};

const png = await renderToPng(spec, {
  fonts: [{ name: "Inter", data: fontData, weight: 400, style: "normal" }],
});

Using Standard Components

import { defineCatalog } from "@json-render/core";
import { schema, standardComponentDefinitions } from "@json-render/image";

export const imageCatalog = defineCatalog(schema, {
  components: standardComponentDefinitions,
});

Adding Custom Components

import { z } from "zod";

const catalog = defineCatalog(schema, {
  components: {
    ...standardComponentDefinitions,
    Badge: {
      props: z.object({ label: z.string(), color: z.string().nullable() }),
      slots: [],
      description: "A colored badge label",
    },
  },
});

Standard Components

| Component | Category | Description |

|-----------|----------|-------------|

| Frame | Root | Root container. Defines width, height, background. Must be root. |

| Box | Layout | Container with padding, margin, border, absolute positioning |

| Row | Layout | Horizontal flex layout |

| Column | Layout | Vertical flex layout |

| Heading | Content | h1-h4 heading text |

| Text | Content | Body text with full styling |

| Image | Content | Image from URL |

| Divider | Decorative | Horizontal line separator |

| Spacer | Decorative | Empty vertical space |

Key Exports

| Export | Purpose |

|--------|---------|

| renderToSvg | Render spec to SVG string |

| renderToPng | Render spec to PNG buffer (requires @resvg/resvg-js) |

| schema | Image element schema |

| standardComponents | Pre-built component registry |

| standardComponentDefinitions | Catalog definitions for AI prompts |

Sub-path Exports

| Export | Description |

|--------|-------------|

| @json-render/image | Full package: schema, components, render functions |

| @json-render/image/server | Schema and catalog definitions only (no React/Satori) |

| @json-render/image/catalog | Standard component definitions and types |

| @json-render/image/render | Render functions only |

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How to use it

Copy the folder

Take vercel-labs/image from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.