cut-the-curve

An agent skill by heygen-com, from heygen-com/hyperframes. Tags: debugging, design, motion-graphics, transition, video.

What it does

The technique catalog: five velocity-matched SEAMS (zoom-through, INVERSE zoom-through, cut-the-curve, waterfall cut, rack-focus blur-cut) plus the two in-scene techniques — waterfall ENTRY (staggered arrival cascades for title cards / segment openers) and the nudge curve (slow-fast-slow three-phase group slides). Covers partial-travel (~12% of frame) velocity matching via mirrored power4 eases, the Z scale-sign rule, size-scaled blur (10px text / 18-20px full-frame), word-by-word staggered cuts, cascade pacing by element weight, and the 10/65/25 slide ratio. Read before authoring any transition, text-beat handoff, kinetic text entry, or group reposition. [depth, zoom, inverse-zoom, scale-sign, mirrored-zoom, rack-focus, pacing, velocity, cut-the-curve, waterfall, stagger, cascade, kinetic-text, title-card, segment-opener, nudge, slide, easing, group-motion, z-depth, motion-graphics, cinematic, transition, blur, directional-continuity]

Install

With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:

npx skills add heygen-com/hyperframes --skill cut-the-curve

Or copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):

git clone --depth 1 https://github.com/heygen-com/hyperframes
cp -r hyperframes/.agents/skills/cut-the-curve ~/.claude/skills/cut-the-curve

Safety box score

Grade A, minimal risk: 0 of 100 risk points, rated 2026-10-20. The grade rates what the skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. How the score works.

This skill is documentation-only: it describes motion-graphics transition techniques and includes GSAP code snippets in Markdown, but no scripts, installers, or networked tooling. The main thing it can influence is how an agent authors animation code; the blast radius is limited to whatever project the user already points it at.

Category levels, from 0 (none) to 3 (high)
Category	Level	Why
Code & shell execution	0 (none)	No shell scripts, binaries, or code-evaluation paths are present; the files are plain Markdown with example snippets only.
Network access	0 (none)	There are no download or upload commands, no URLs to fetch, and no remote API calls in the skill files.
Filesystem reach	0 (none)	The skill does not instruct edits outside the project or touch home/system paths; it only describes animation patterns and example selectors.
Secrets & credentials	0 (none)	It does not request tokens, keys, passwords, browser sessions, or other credentials.
Privilege & persistence	0 (none)	No sudo, service registration, global installation, or shell/OS configuration changes are described.
Instruction hijack surface	0 (none)	The text contains normal domain guidance like "read it first" and "must" rules for animation design, but nothing that tries to override agent instructions or hide content.
Irreversible actions	0 (none)	It is purely advisory and does not send messages, publish, deploy, pay, or delete anything.
Transparency	0 (none)	There are no binaries, obfuscated blobs, unpinned installs, or decoded-at-runtime code; everything provided is readable Markdown.

Before installing

Skim `SKILL.md` and `examples/gsap-implementation.md` to confirm they are only guidance and code samples.
Check the skill directory for any non-Markdown files before enabling it in a workflow.
If you use the snippets, test them in a scratch project first so any animation changes stay local.

Rated 2026-10-20 by an automated review of 2 files from the skill's repository.

Source

Repository: heygen-com/hyperframes (all skills from this repository)
Path: .agents/skills/cut-the-curve/SKILL.md
Branch: main
Updated: 2026-09-19

motion-doctrine — GATEWAY — load FIRST before composing any HyperFrames animation or video.
seam-craft — Render-correctness doctrine for scene-to-scene seams in HyperFrames launch videos — the prerequisites that make transitions composite correctly on the master.
ad-creative — When the user wants to generate, iterate, or scale ad creative — headlines, descriptions, primary text.
captions-overlay — Overlay doctrine for the embedded-captions workflow — the caption MODEL (drop / rail / embed) and the rule that captions are an OVERLAY composited on top of.
embedded-captions — Add captions or subtitles to an existing single-subject talking-head video without editing the footage.
faceless-explainer — Turn arbitrary text — an article, notes, a topic, a brief — into a faceless explainer video: there is no site or footage to capture.