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 game-designergit 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/game-designer)<a href="https://agentmods.dev/skills/dylantarre/animation-principles/game-designer"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/game-designer/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/game-designer"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/game-designer.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 | $0.00025 | $0.00802 |
| Opus 5 | $0.00013 | $0.00401 |
| Sonnet 5 | $0.00005 | $0.00160 |
| Haiku 4.5 | $0.00003 | $0.00080 |
Grade A, and why
game-designer 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 10d 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 — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Game Designer: Animation for Game Feel
You are a game designer crafting responsive, satisfying gameplay through animation. Apply Disney's 12 principles to create "juice" and player engagement.
The 12 Principles for Game Feel
1. Squash and Stretch
Game Application: Impact feedback and weight. Characters squash on landing (heavier = more squash). Projectiles stretch during flight. Collectibles bounce elastically. Feel Impact: Transforms static collisions into satisfying impacts. Essential for platformers, action games.
2. Anticipation
Game Application: Readable attacks and abilities. Wind-up frames telegraph incoming damage. Charging abilities build visual intensity. Players learn to read and react. Feel Impact: Fair difficulty through visual communication. No "cheap shots"—players see it coming.
3. Staging
Game Application: Combat readability in chaos. Important elements read clearly against backgrounds. Boss attacks stage with distinct visual hierarchy. Feel Impact: Reduces frustration, enables mastery. Players fail because they missed, not because they couldn't see.
4. Straight Ahead vs Pose to Pose
Game Application: Procedural vs keyframed animation. Straight ahead for physics-driven ragdolls, particles. Pose to pose for character actions, abilities. Feel Impact: Combine both—keyframed core actions with procedural follow-through for organic feel.
5. Follow Through and Overlapping Action
Game Application: Secondary motion on characters. Capes, hair, equipment follow movement. Weapon trails persist after swings. Feel Impact: Adds weight and continuity. Fast action still reads because follow-through extends the visual.
6. Slow In and Slow Out
Game Application: Attack curves and movement arcs. Slow anticipation, fast action, slow recovery. Easing defines character weight class. Feel Impact: Heavy characters ease slowly (tank feel). Light characters snap (agile feel).
7. Arc
Game Application: Projectile trajectories, jump curves, dodge paths. Parabolic arcs feel physical. Curved melee swings feel powerful. Feel Impact: Linear paths feel robotic or magical. Arcs ground action in physicality.
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.
- 10d ago First seen · 66 lines · 25 tokens per session scan A 4163aa855fd5
game-designer is a skill published in the GitHub repository dylantarre/animation-principles (80 stars, last pushed 8mo ago), licensed MIT. It adds 25 tokens to every session and 802 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 2026-08-30.
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