Create motion

Create Motion

Produce a MotionProof bundle or return the structured failure. Never describe an uncertified candidate as production-ready.

If the host project does not already have MotionProof, install the current public release before running the commands below:

npm install https://github.com/HowdyDooToYou/lottie-animation-pipeline/releases/download/v2.0.0/motionproof-2.0.0.tgz

Choose the route

• Start without a model or API key: use a built-in recipe.
• When another agent or model created Lottie JSON: certify that candidate.
• When application code owns model access: use the typed provider interface.
• When the host supports MCP: prefer the create_motion, certify_motion, and list_motion_recipes tools.

Create from a prompt

Run:

npx motionproof create "<motion intent>" --json

Add --recipe <id> only when the user selected a recipe. Add theme flags only when real design tokens are available:

--primary '#2f70ff' --accent '#ef6545' --background '#11151b'

Certify an existing candidate

Run:

npx motionproof certify ./candidate.json \
  --prompt "<intended visual behavior>" \
  --json

Do not repair or silently promote a failed candidate. Use its structured issues to revise the source, then certify again.

Integrate the result

Require ok: true and certification.certified: true. Then:

1. Copy animation.json to the target app's supported asset location.
2. Use poster.png whenever reduced motion is requested or JavaScript motion is unavailable.
3. Keep manifest.json and certification.json with the release or CI evidence.
4. Use preview.html for offline review.
5. Respect the target repository's runtime, performance, and accessibility constraints. Do not introduce motion into a surface that explicitly excludes it.

Typed provider

Keep credentials and model SDKs in the host application:

import { createMotion, defineMotionProvider } from "motionproof";

const provider = defineMotionProvider("my-agent", async ({ systemPrompt, request }) => {
  const text = await callMyModel(systemPrompt, request.prompt);
  return text;
});

const result = await createMotion(
  { prompt: "A restrained save confirmation" },
  { provider, outputDirectory: "./public/motion" },
);

The provider may return Lottie JSON, JSON text, or { animation, model?, recipe?, notes? }. MotionProof owns validation, browser rendering, poster capture, hashing, and atomic promotion.

The certified subset is expression-free and vector-only. Do not introduce image/audio layers, remote assets, external fonts, or executable expressions.

Definition of done

Accept only a bundle whose checks all pass:

• strict Lottie schema without auto-repair
• expression-free vector content with no external dependencies
• quality score of at least 85
• every representative frame paints pixels
• meaningful motion across sampled transitions
• payload within the delivery budget
• reduced-motion poster captured

If any check fails, report the failure stage and concrete issues. Do not copy a candidate into production paths.