Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add dylantarre/animation-principles --skill universal-toolgit clone --depth 1 https://github.com/dylantarre/animation-principlesWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/dylantarre/animation-principles/universal-tool)<a href="https://agentmods.dev/skills/dylantarre/animation-principles/universal-tool"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/universal-tool/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/dylantarre/animation-principles/universal-tool"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/universal-tool.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00019 | $0.01000 |
| Opus 5 | $0.00010 | $0.00500 |
| Sonnet 5 | $0.00004 | $0.00200 |
| Haiku 4.5 | $0.00002 | $0.00100 |
Grade A, and why
universal-tool scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Universal Animation Principles
Apply all 12 Disney animation principles regardless of your tool or framework.
1. Squash and Stretch
Concept: Objects deform when moving, maintaining volume.
Implementation:
- When compressing one axis, expand the other
scaleX * scaleY ≈ constant- Apply on impact, acceleration, or deceleration
Values: Compress to 80%, expand to 120%
2. Anticipation
Concept: Prepare the audience for an action.
Implementation:
- Move opposite to the main action first
- ~20% of total duration for wind-up
- Smaller anticipation for faster actions
Pattern: Wind-up → Action → Settle
3. Staging
Concept: Direct viewer attention to what matters.
Implementation:
- Blur or fade background elements
- Scale up the focal point
- Use contrast (color, size, motion)
- One clear action at a time
4. Straight Ahead / Pose to Pose
Straight Ahead: Animate frame-by-frame sequentially. Good for fluid, organic motion.
Pose to Pose: Define key poses, then fill in between. Good for precise, planned motion.
Recommendation: Use pose-to-pose for UI, straight ahead for particles/effects.
5. Follow Through and Overlapping Action
Concept: Different parts move at different rates.
Implementation:
- Offset timing of child elements
- Add 2-5 frame delay for secondary elements
- Lighter/looser parts drag behind
- Use easing with different curves per element
6. Slow In and Slow Out
Concept: Natural motion accelerates and decelerates.
Implementation:
- Use ease-in-out for most movements
- Ease-out for entrances (arrives gently)
- Ease-in for exits (leaves naturally)
- Linear only for mechanical motion
Common curve: cubic-bezier(0.42, 0, 0.58, 1)
7. Arc
Concept: Natural movement follows curved paths.
Implementation:
- Avoid straight-line motion for organic elements
- Use motion paths or multi-point keyframes
- Parabolic arcs for thrown objects
- Pendulum arcs for swings
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 163 lines · 19 tokens per session scan A bcf1af3050f0
universal-tool is a skill published in the GitHub repository dylantarre/animation-principles (81 stars, last pushed 8mo ago), licensed MIT. It adds 19 tokens to every session and 1,000 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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