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React PDF

vercel-labs/react-pdf

React PDF renderer for json-render. Use when generating PDF documents from JSON specs, working with @json-render/react-pdf, or rendering specs to PDF buffers/streams/files.

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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 react-pdf

The instruction itself

8 sections, as written by the author

@json-render/react-pdf

React PDF renderer that generates PDF documents from JSON specs using @react-pdf/renderer.

Installation

npm install @json-render/core @json-render/react-pdf

Quick Start

import { renderToBuffer } from "@json-render/react-pdf";
import type { Spec } from "@json-render/core";

const spec: Spec = {
  root: "doc",
  elements: {
    doc: { type: "Document", props: { title: "Invoice" }, children: ["page"] },
    page: {
      type: "Page",
      props: { size: "A4" },
      children: ["heading", "table"],
    },
    heading: {
      type: "Heading",
      props: { text: "Invoice #1234", level: "h1" },
      children: [],
    },
    table: {
      type: "Table",
      props: {
        columns: [
          { header: "Item", width: "60%" },
          { header: "Price", width: "40%", align: "right" },
        ],
        rows: [
          ["Widget A", "$10.00"],
          ["Widget B", "$25.00"],
        ],
      },
      children: [],
    },
  },
};

const buffer = await renderToBuffer(spec);

Render APIs

import { renderToBuffer, renderToStream, renderToFile } from "@json-render/react-pdf";

// In-memory buffer
const buffer = await renderToBuffer(spec);

// Readable stream (pipe to HTTP response)
const stream = await renderToStream(spec);
stream.pipe(res);

// Direct to file
await renderToFile(spec, "./output.pdf");

All render functions accept an optional second argument: { registry?, state?, handlers? }.

Standard Components

| Component | Description |

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

| Document | Top-level PDF wrapper (must be root) |

| Page | Page with size (A4, LETTER), orientation, margins |

| View | Generic container (padding, margin, background, border) |

| Row, Column | Flex layout with gap, align, justify |

| Heading | h1-h4 heading text |

| Text | Body text (fontSize, color, weight, alignment) |

| Image | Image from URL or base64 |

| Link | Hyperlink with text and href |

| Table | Data table with typed columns and rows |

| List | Ordered or unordered list |

| Divider | Horizontal line separator |

| Spacer | Empty vertical space |

| PageNumber | Current page number and total pages |

Custom Catalog

import { defineCatalog } from "@json-render/core";
import { schema, defineRegistry, renderToBuffer } from "@json-render/react-pdf";
import { standardComponentDefinitions } from "@json-render/react-pdf/catalog";
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",
    },
  },
  actions: {},
});

const { registry } = defineRegistry(catalog, {
  components: {
    Badge: ({ props }) => (
      <View style={{ backgroundColor: props.color ?? "#e5e7eb", padding: 4 }}>
        <Text>{props.label}</Text>
      </View>
    ),
  },
});

const buffer = await renderToBuffer(spec, { registry });

External Store (Controlled Mode)

Pass a StateStore for full control over state:

import { createStateStore } from "@json-render/react-pdf";

const store = createStateStore({ invoice: { total: 100 } });
store.set("/invoice/total", 200);

Server-Safe Import

Import schema and catalog without pulling in React:

import { schema, standardComponentDefinitions } from "@json-render/react-pdf/server";

How to use it

Copy the folder

Take vercel-labs/react-pdf 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.

Install what it needs

The instructions reference npm. Without those the skill loads but fails at the first command.