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Motion Diagram

by igun997
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Motion Diagram

Agent-driven animated diagram renderer. Turn an API/flow/architecture description into an animated MP4 (glowing pulses traveling edges, node pops, camera focus, 8-bit sfx) or an Instagram-style carousel (silent GIF + WebP slides).

Built for content creators. Designed to be driven by an AI agent over MCP — the agent designs the scene, this tool renders it.

Stack

  • Remotion (React → MP4 via headless Chrome + ffmpeg)

  • dagre (auto-layout)

  • ffmpeg (sfx synthesis, GIF→WebP)

  • MCP SDK (agent interface)

Related MCP server: @excalimate/mcp-server

Install

# one-off, no install
npx motion-diagram render examples/login-flow.json -- --out login.mp4

# or global
npm install -g motion-diagram

# or from a clone
npm install

Check prerequisites (Node >=18, ffmpeg, deps):

npx motion-diagram doctor

First render downloads a headless Chrome (~once). Full guide: docs/INSTALL.md.

CLI

# video (MP4 + sfx)
npm run render examples/login-flow.json -- --out output/login-flow.mp4

# carousel (GIF + WebP per node group)
npm run render examples/login-flow.json -- --mode carousel --out output/login-carousel

# live preview studio
npm run studio

Scene JSON

Agent emits nodes, edges, and a timeline. See docs/SCHEMA.md.

{
  "meta": { "title": "Login Flow", "fps": 30, "width": 1920, "height": 1080 },
  "nodes": [
    { "id": "client", "label": "Client", "shape": "rect", "icon": "user" },
    { "id": "api", "label": "API", "shape": "rect", "icon": "server" },
    { "id": "db", "label": "DB", "shape": "stadium", "icon": "database" },
  ],
  "edges": [
    { "id": "e1", "from": "client", "to": "api", "label": "POST /login" },
    { "id": "e2", "from": "api", "to": "db", "label": "query" },
  ],
  "timeline": [
    { "at": 0, "type": "reveal-node", "target": "client" },
    { "at": 8, "type": "reveal-node", "target": "api" },
    { "at": 16, "type": "reveal-node", "target": "db" },
    { "at": 24, "type": "reveal-edge", "target": "e1" },
    { "at": 42, "type": "reveal-edge", "target": "e2" },
    {
      "at": 60,
      "type": "pulse",
      "edge": "e1",
      "color": "#38bdf8",
      "onArrive": { "flash": true, "sfx": "beep" },
    },
    {
      "at": 95,
      "type": "pulse",
      "edge": "e2",
      "color": "#34d399",
      "onArrive": { "flash": true, "sfx": "ding" },
    },
  ],
}

Motion primitives

type

effect

reveal-node

node pops in (spring scale + fade)

reveal-edge

edge draws like a pen

pulse

glowing comet travels edge (data flow), multi-color

flash

node glow burst

camera

pan/zoom focus to a node

Sound

Bundled 8-bit sfx in public/sfx/: beep, whoosh, ding. Chosen per event by the agent (sfx / onArrive.sfx), or none. Swap the WAV files to rebrand.

Icons

user client server api database cloud queue cache lock key gear bolt globe mobile mail file check cross warning

MCP + skill install (for AI agents)

Motion Diagram is designed to be driven by an AI agent over MCP. Install the skill into your agent with one command:

# auto-detect installed agents and register the MCP server
npx motion-diagram install-skill

# or target a specific client
npx motion-diagram install-skill --client cursor
npx motion-diagram install-skill --client claude
npx motion-diagram install-skill --client pi

This writes a motion-diagram entry into each agent's MCP config:

Agent

Config file

Cursor

~/.cursor/mcp.json

Claude Desktop

claude_desktop_config.json (OS-specific dir)

Pi

~/.pi/agent/mcp.json

Installing the npm package also runs this automatically (postinstall), so a plain npm install -g motion-diagram registers the skill for any detected agent. Restart your agent afterward to load the tools.

Manual config

Any MCP client works — point it at the motion-diagram-mcp command:

{
  "mcpServers": {
    "motion-diagram": {
      "command": "npx",
      "args": ["-y", "motion-diagram-mcp"]
    }
  }
}

Run the server directly for debugging:

npx motion-diagram-mcp        # or, from a clone: npm run mcp

Tools:

  • get_scene_schema — call first, returns authoring contract

  • render_motion_diagram — scene → MP4

  • render_carousel — scene → GIF/WebP slides (by node group)

Agent guidance: docs/AGENT_SKILL.md. Contributing: CONTRIBUTING.md.

Project layout

src/core/    parser, layout (dagre), timeline normalizer
src/scenes/  Remotion components (node, edge, pulse, composition, root)
src/render/  MP4 + carousel render orchestration
src/cli/     CLI entry
src/mcp/     MCP server
public/sfx/  bundled 8-bit sounds
docs/        SPEC, SCHEMA, AGENT_SKILL
examples/    sample scenes

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