calesthio/openmontageMIT1 file

SVG Character Animation

Animate SVG character rigs with GSAP, CSS transforms, Remotion frame control, and HyperFrames-compatible browser previews.

Specification
Skill ID
calesthio/openmontage/svg-character-animation
Publisher
calesthio
Repository
openmontage
Installs
0
Files
1
License
MIT
Synced
Sep 23, 2026
How to use it

Open any RiverX project, open the Skills panel in the chat, and search for this identifier. The files are fetched from the source repository at install time.

calesthio/openmontage/svg-character-animationInstalls these files
  • SKILL.md

What this skill tells the agent

SVG Character Animation

Use this skill when animating character rigs made from SVG parts.

Runtime Rules

  • Animate transforms (x, y, scale, rotation) rather than layout.
  • Use timelines for multi-part acting beats.
  • For SVG elements, use stable pivots (svgOrigin or correctly scoped transform origins).
  • In Remotion, do not let GSAP advance with requestAnimationFrame; drive a paused timeline from the current frame.

Browser Pattern

gsap.set("#arm_right", { svgOrigin: "390 310" });
const tl = gsap.timeline({ defaults: { ease: "power2.inOut" } });
tl.to("#head", { rotation: -8, duration: 0.2 })
  .to("#arm_right", { rotation: 35, duration: 0.4 }, "<");

Remotion Pattern

const frame = useCurrentFrame();
const progress = frame / durationInFrames;
timeline.progress(progress);

HyperFrames Pattern

Use HTML/SVG/GSAP components with deterministic timelines and validate via the HyperFrames CLI before final render.

Quality Checklist

  • Parts stay connected at pivots during motion.
  • Blinks, gaze, and mouth shapes are separate enough to read.
  • Pose holds are long enough to communicate emotion.
  • Frame sampling shows meaningful deltas, not frozen animation.

Sources

  • GSAP core transform properties and SVG handling: https://gsap.com/docs/v3/GSAP/CorePlugins/CSS/
  • GSAP timelines and sequencing: https://gsap.com/docs/v3/GSAP/Timeline/
  • Remotion useCurrentFrame: https://www.remotion.dev/docs/use-current-frame

Use this skill in a project

Open any RiverX project, search the Skills panel for calesthio/openmontage/svg-character-animation, and install it in one click.

Use this skill