# Particle assembly — MOTION_DESIGN.md

Version: 0.1.0 · Kind: source-backed remix example · Author: OpenMotion documentation contributors.

## Reference and provenance

- Source: [Hyperframes / code-particle-assemble](https://github.com/heygen-com/hyperframes/tree/070b964d7b8cd844a893f0abbe8e0b7f1ac6d879/registry/blocks/code-particle-assemble); Apache-2.0. Original source revision: `070b964d7b8cd844a893f0abbe8e0b7f1ac6d879`.
- [Upstream reference video](../../assets/code-particle-assemble/reference.mp4). The README pair is rendered from the bundled source with original versus changed content; it is not a blind reconstruction of the upstream MP4.
- [Editable source](../../assets/code-particle-assemble/index.html) · [Exact replacement preset](../../presets/code-particle-assemble.json).
- [Pack instructions](../../SKILL.md) · [Licenses and asset notes](../../NOTICE.md).

## Creative invariant

Preserve deterministic particle origins, target sampling, delays and assemble/hold timing.

## Story and replacement contract

parse → optimize → emit becomes select → trim → render.

Replace the code tokens and pipeline name while retaining token colors and line breaks. Displayed code is illustrative.

## Timeline and format

8 s composition; particles converge into code-shaped targets using the source seed and GSAP progress.

Canvas: 1920 × 1080; full composition: 8 seconds. Comparison excerpts use a shared source-time range on both sides. They are silent; no music, voice or audio fidelity is claimed.

## Material requirements

This preset uses the supplied code, type and artwork. No paid generation service is required. The materializer copies pinned scripts, fonts, textures and the reference video into the output project and rewrites CDN/font URLs locally. Custom fonts must be supplied as local files. For a personal adaptation, supply approved copy and any requested brand replacements.

## Review

Changing text changes the target point cloud; preserve the motion function, not the original pixels.

Compare matching timestamps: entrance, main hold and exit. Record source hash, exact preset, render environment, output file and observed problems. Source reuse proves this content substitution can preserve the implementation; it does not prove arbitrary video reconstruction, a similarity percentage, or audience performance. See the pack's evidence manifest for checks actually completed.