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 playfulness-fungit 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/playfulness-fun)<a href="https://agentmods.dev/skills/dylantarre/animation-principles/playfulness-fun"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/playfulness-fun/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/playfulness-fun"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/playfulness-fun.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 | $0.00023 | $0.00809 |
| Opus 5 | $0.00012 | $0.00404 |
| Sonnet 5 | $0.00005 | $0.00162 |
| Haiku 4.5 | $0.00002 | $0.00081 |
Grade A, and why
playfulness-fun 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 7d 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 — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Playfulness & Fun Animation
Create animations that entertain, surprise, and make interactions genuinely enjoyable.
Emotional Goal
Playfulness invites interaction through unexpected, whimsical motion. Fun comes from animations that have personality, respond expressively, and make users smile.
Disney Principles for Playfulness
Squash & Stretch
Generous, exaggerated (25-40%). Rubbery, cartoon physics. Objects should feel alive and reactive. Bounce like a beach ball.
Anticipation
Exaggerated wind-ups (150-250ms). Comic timing—big preparation for big payoff. Elements "think" before acting.
Staging
Theatrical presentation. Clear setup and punchline. Give playful moments room to breathe and be noticed.
Straight Ahead Action
Embrace spontaneity. Wobbly paths, unpredictable bounces. Characters and elements with minds of their own.
Follow Through & Overlapping Action
Extensive, bouncy follow-through. Overshoots, wobbles, and settling. Like a cartoon character skidding to a stop.
Slow In & Slow Out
Asymmetric with overshoot. Quick starts, bouncy landings. cubic-bezier(0.68, -0.55, 0.265, 1.55) for elastic effect.
Arc
Exaggerated, bouncy curves. High arcs for jumps. Squiggly paths for personality. Nothing moves in straight lines.
Secondary Action
Abundant! Wiggles, sparkles, expressions. Elements react to each other. The whole interface feels alive.
Timing
Varied and expressive (100-500ms). Quick snaps, slow anticipation. Comic timing with beats and pauses.
Exaggeration
High (30-50%). Push movements to cartoon levels. Impossible physics that feel emotionally true.
Solid Drawing
Maintain appeal through deformation. Stretched elements stay charming. Volume shifts for effect.
Appeal
Round, friendly shapes. Bright, saturated colors. Big eyes, expressive forms. Character in everything.
Timing Recommendations
| Element | Duration | Easing |
|---|---|---|
| Bounce | 400-600ms | spring(1, 60, 8) |
| Wiggle | 300-400ms | ease-in-out |
| Pop | 150-250ms | ease-out-back |
| Squash | 100-150ms | ease-out |
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.
- 7d ago First seen · 97 lines · 23 tokens per session scan A 95bc6a7c91d9
playfulness-fun is a skill published in the GitHub repository dylantarre/animation-principles (80 stars, last pushed 8mo ago), licensed MIT. It adds 23 tokens to every session and 809 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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