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 page-transitionsgit 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/page-transitions)<a href="https://agentmods.dev/skills/dylantarre/animation-principles/page-transitions"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/page-transitions/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/page-transitions"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/page-transitions.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 | $0.00027 | $0.01123 |
| Opus 5 | $0.00014 | $0.00562 |
| Sonnet 5 | $0.00005 | $0.00225 |
| Haiku 4.5 | $0.00003 | $0.00112 |
Grade A, and why
page-transitions 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 11d 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 — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Page Transition Animation
Apply Disney's 12 animation principles to route changes, view transitions, and navigation patterns.
Quick Reference
| Principle | Page Transition Implementation |
|---|---|
| Squash & Stretch | Entering page elastic effect |
| Anticipation | Exit animation before enter |
| Staging | Hero elements bridge views |
| Straight Ahead / Pose to Pose | Shared element vs crossfade |
| Follow Through / Overlapping | Content settles after nav |
| Slow In / Slow Out | Asymmetric enter/exit easing |
| Arc | Slide transitions with curve |
| Secondary Action | Background, nav state changes |
| Timing | 200-500ms total transition |
| Exaggeration | Reserved for emphasis moments |
| Solid Drawing | Consistent spatial model |
| Appeal | Smooth, oriented navigation |
Principle Applications
Squash & Stretch: Incoming pages can have subtle elastic settle. Modal sheets bounce slightly on full open. Pull-to-navigate stretches before triggering.
Anticipation: Current page begins exit before new page enters. Slight fade or scale prepares for change. Navigation indicator updates before page swaps.
Staging: Shared/hero elements maintain context across views. Common elements (nav, footer) stay stable. New content area receives transition focus.
Straight Ahead vs Pose to Pose: Shared element transitions morph continuously (straight ahead). Crossfades swap between discrete states (pose to pose). Choose based on content relationship.
Follow Through & Overlapping: Page content settles after initial position. Staggered content entry—header, then body, then footer. Images load with subtle fade after container.
Slow In / Slow Out: Exit: ease-in (accelerate away). Enter: ease-out (decelerate in). Combined: ease-in-out for shared elements. Never linear—feels broken.
Arc: Slide transitions can curve slightly. Stack navigation implies z-depth. Circular reveals expand from trigger point.
Secondary Action: Header updates title during transition. Bottom nav indicator moves. Background color shifts. Scroll position resets with transition.
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.
- 11d ago First seen · 143 lines · 27 tokens per session scan A 6cbc1547af58
page-transitions is a skill published in the GitHub repository dylantarre/animation-principles (80 stars, last pushed 8mo ago), licensed MIT. It adds 27 tokens to every session and 1,123 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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