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* feat(skills): add gsap-effects skill with typewriter pattern Distills typewriter text animation into a reusable reference: basic typewriter, blinking cursor, word rotation, appending words, and a characters-per-second timing guide. Uses GSAP TextPlugin. Also references the new skill from compose-video. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix(skills): emphasize cursor must always blink when idle and sit flush Two key rules added to the typewriter skill: 1. Cursor must blink in every idle state (after typing, after clearing, during hold pauses) — a solid idle cursor looks broken. 2. No whitespace between text and cursor elements in HTML — any gap between the last character and the caret looks wrong. Also adds cursor-hide state for multi-line handoffs and updates word rotation example to include cursor state management. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix(skills): backspace must delete from end, not front TextPlugin's text:{value:""} removes characters from the front, which looks wrong. Added a backspace helper that steps through substrings from right to left using tl.call(). Updated word rotation example to use it. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix(skills): handoffs must blink before typing, use margin for spacing Two lessons from testing: 1. Cursor handoffs need a blink pause — going hide→solid directly skips the idle state. Pattern: hide→blink→pause→solid→type→blink. 2. Use margin-left on a wrapper span for spacing between static and dynamic text. Flex gap spaces the cursor away, trailing spaces collapse. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix(skills): enforce single visible cursor as a hard rule Only one cursor may be visible at a time. Multiple cursors on screen looks broken. Every other cursor must be cursor-hide. Promoted to rule #1 in the cursor section. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> --------- Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>
Hyperframes
Write HTML. Render video. Built for agents.
Hyperframes is an open-source video rendering framework that lets you create, preview, and render HTML-based video compositions — with first-class support for AI agents via MCP.
Why Hyperframes?
- HTML-native — AI agents already speak HTML. No React required.
- Frame Adapter pattern — bring your own animation runtime (GSAP, Lottie, CSS, Three.js).
- Deterministic rendering — same input = identical output. Built for automated pipelines.
- AI-first design — not a bolted-on afterthought.
Quick Start
npx hyperframes init my-video
cd my-video
Then open the project with your AI coding agent (Claude Code, Cursor, etc.) — it has HyperFrames skills installed and knows how to create and edit compositions.
npx hyperframes preview # preview in browser (live reload)
npx hyperframes render # render to MP4
Requirements: Node.js >= 22, FFmpeg
Documentation
Full documentation at hyperframes.heygen.com — start with the Quickstart, then explore guides, concepts, API reference, and package docs.
How It Works
Define your video as HTML with data attributes:
<div id="stage" data-composition-id="my-video" data-start="0" data-width="1920" data-height="1080">
<video
id="clip-1"
data-start="0"
data-duration="5"
data-track="0"
src="intro.mp4"
muted
playsinline
></video>
<img id="overlay" data-start="2" data-duration="3" data-track="1" src="logo.png" />
<audio
id="bg-music"
data-start="0"
data-duration="9"
data-track="2"
data-volume="0.5"
src="music.wav"
></audio>
</div>
Preview instantly in the browser. Render to MP4 locally. Let AI agents compose videos using tools they already understand.
Packages
| Package | Description |
|---|---|
hyperframes |
CLI — create, preview, lint, and render compositions |
@hyperframes/core |
Types, parsers, generators, linter, runtime, frame adapters |
@hyperframes/engine |
Seekable page-to-video capture engine (Puppeteer + FFmpeg) |
@hyperframes/producer |
Full rendering pipeline (capture + encode + audio mix) |
@hyperframes/studio |
Browser-based composition editor UI |
AI Agent Skills
HyperFrames ships skills that teach AI coding agents (Claude Code, Gemini CLI, Codex, Cursor) how to write correct compositions and GSAP animations. Use these instead of writing from scratch — they encode framework-specific patterns that generic docs don't cover.
Install via CLI (recommended)
# Install all skills (HyperFrames + GSAP) — runs automatically during `hyperframes init`
npx hyperframes skills
# Or install to a specific agent
npx hyperframes skills --claude
npx hyperframes skills --cursor
Or via npx skills add
# HyperFrames skills (hyperframes-compose, hyperframes-captions)
npx skills add heygen-com/hyperframes
# GSAP skills (gsap-core, gsap-timeline, gsap-scrolltrigger, gsap-plugins, gsap-performance, gsap-utils, gsap-react, gsap-frameworks)
npx skills add greensock/gsap-skills
Installed Skills
| Source | Skills | What they teach |
|---|---|---|
| HyperFrames | hyperframes-compose, hyperframes-captions |
HTML composition structure, class="clip" rules, data-* attributes, timeline registration, rendering constraints |
| GSAP | gsap-core, gsap-timeline, gsap-performance, gsap-plugins, gsap-scrolltrigger, gsap-utils, gsap-react, gsap-frameworks |
Core API, timeline sequencing, ScrollTrigger, plugin usage, performance best practices |
In Claude Code, invoke with /hyperframes-compose, /hyperframes-captions, /gsap-core, etc.
Contributing
See CONTRIBUTING.md for guidelines on how to contribute.
License
See LICENSE for details.