Vance IngallsandClaude Opus 4.6
4c5b8e38a1
Add two new skill reference files that address measured LLM composition failures: - fonts.md: Typography principles — banned fonts, guardrails for violations (pairing two sans-serifs, defaulting to 400/700 weight), and guidance the LLM genuinely doesn't apply without being told (register switching, tension as meaning, easing direction as emotion). Includes Google Fonts API discovery script with 7-category multi-strategy query. - motion-principles.md: Motion design principles — guardrails for same-ease and same-speed defaults, y-axis entrance monotony, and guidance for build/breathe/ resolve scene structure, hard cuts as intentional transitions, visual composition rules for video-not-web density. Both files validated against baseline evals: 3 compositions created without guidance confirmed the LLM reaches for banned fonts (Inter, Cormorant Garamond, Playfair Display, Roboto Condensed), uses power2.out on 45-72% of tweens, enters 80%+ of elements from y-axis, and pairs multiple sans-serifs. Also: - Fix validate.ts $& replacement bug (runtime source containing $& caused String.prototype.replace to re-insert the matched <script src=""> tag) - Clean up font loading guidance across skills (compiler embeds automatically) - Update house-style.md to reference fonts.md Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
hyperframes
CLI for creating, previewing, and rendering HTML video compositions.
Install
npm install -g hyperframes
Or use directly with npx:
npx hyperframes <command>
Requirements: Node.js >= 22, FFmpeg
Commands
init
Scaffold a new Hyperframes project from a template:
npx hyperframes init my-video
cd my-video
preview
Start the live preview studio in your browser:
npx hyperframes preview
# Studio running at http://localhost:3002
npx hyperframes preview --port 4567
render
Render a composition to MP4:
npx hyperframes render ./my-composition.html -o output.mp4
lint
Validate your Hyperframes HTML:
npx hyperframes lint ./my-composition
npx hyperframes lint ./my-composition --json # JSON output for CI/tooling
npx hyperframes lint ./my-composition --verbose # Include info-level findings
By default only errors and warnings are shown. Use --verbose to also display informational findings (e.g., external script dependency notices). Use --json for machine-readable output with errorCount, warningCount, infoCount, and a findings array.
compositions
List compositions found in the current project:
npx hyperframes compositions
benchmark
Run rendering benchmarks:
npx hyperframes benchmark ./my-composition.html
doctor
Check your environment for required dependencies (Chrome, FFmpeg, Node.js):
npx hyperframes doctor
browser
Manage the bundled Chrome/Chromium installation:
npx hyperframes browser
info
Print version and environment info:
npx hyperframes info
docs
Open the documentation in your browser:
npx hyperframes docs
upgrade
Check for updates and show upgrade instructions:
npx hyperframes upgrade
npx hyperframes upgrade --check --json # machine-readable for agents
Documentation
Full documentation: hyperframes.heygen.com/packages/cli
Related packages
@hyperframes/core— types, parsers, frame adapters@hyperframes/engine— rendering engine@hyperframes/producer— render pipeline@hyperframes/studio— composition editor UI