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 vvedantb/eva --skill transitions-devgit clone --depth 1 https://github.com/vvedantb/evaWrote 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/vvedantb/eva/transitions-dev)<a href="https://agentmods.dev/skills/vvedantb/eva/transitions-dev"><img src="https://agentmods.dev/badge/skills/vvedantb/eva/transitions-dev/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/vvedantb/eva/transitions-dev"><img src="https://agentmods.dev/badge/skills/vvedantb/eva/transitions-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector 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 | $0.00280 | $0.05674 |
| Opus 5.5 | $0.00112 | $0.02270 |
| Sonnet 5.5 | $0.00056 | $0.01135 |
| Haiku 4.5 | $0.00028 | $0.00567 |
Grade A, and why
transitions-dev 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 1mo 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 — 226 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Transitions.dev
Twenty-one portable CSS transitions, each namespaced under t-* selectors with semantic CSS custom properties. Drop-in: paste the snippet, wire the documented HTML hooks, done. No framework dependencies, no demo-specific markup, and every snippet ships a prefers-reduced-motion guard.
Quick reference
| Transition | When to use | Reference |
|---|---|---|
| Card resize | Tween a container's width or height when its layout state changes. | 01-card-resize.md |
| Number pop-in | Re-enter each digit with a blurred slide when a number updates. | 02-number-pop-in.md |
| Notification badge | Slide a small badge onto a trigger and pop the dot. | 03-notification-badge.md |
| Text states swap | Swap text in place with a blurred up-and-down transition. | 04-text-states-swap.md |
| Menu dropdown | Open an origin-aware dropdown that grows from its trigger. | 05-menu-dropdown.md |
| Modal open / close | Scale-up modal dialog with a softer scale-down on close. | 06-modal.md |
| Panel reveal | Slide a panel into a region with a cross-blur. | 07-panel-reveal.md |
| Page side-by-side | Slide between two side-by-side pages (list ↔ detail, step 1 ↔ step 2). | 08-page-side-by-side.md |
| Icon swap | Cross-fade two icons in the same slot with blur and scale. | 09-icon-swap.md |
| Success check | Compose fade + rotate + Y-bob + path stroke-draw to celebrate a completed action. | 10-success-check.md |
| Avatar group hover | Distance-falloff lift on a row of items with a bouncy spring on return. | 11-avatar-group-hover.md |
| Error state shake | Per-segment cubic-bezier shake with auto-reverting border + message. | 12-error-state-shake.md |
| Input clear with dissolve | Fly-out + per-word streak when a text field is cleared. | 13-input-clear-dissolve.md |
| Skeleton loader and reveal | Pulse a placeholder, then cross-fade + cross-blur to the loaded content. | 14-skeleton-reveal.md |
| Shimmer text | Sweep a highlight band across muted text on a loop (pure CSS). | 15-shimmer-text.md |
| Tabs sliding | Slide the active pill between tabs in a segmented control. | 16-tabs-sliding.md |
| Tooltip open/close | Delayed fade+scale in, instant out (pure CSS). | 17-tooltip.md |
| Texts reveal | Staggered blurred rise for stacked text lines, quiet fade out. | 18-texts-reveal.md |
| Card hover tilt | Tilt a card in 3D toward the pointer with a cursor-tracked glare. | 19-card-tilt.md |
| Plus to menu morph | Morph a circular trigger into the menu / panel it opens. | 20-plus-menu-morph.md |
| Accordion expand | Grow / shrink a panel via grid-rows with a chevron flip. | 21-accordion.md |
What ships with it
22 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- _root.css 7.1 KB
- 01-card-resize.md 1.8 KB
- 02-number-pop-in.md 4.0 KB
- 03-notification-badge.md 4.4 KB
- 04-text-states-swap.md 3.2 KB
- 05-menu-dropdown.md 3.7 KB
- 06-modal.md 3.0 KB
- 07-panel-reveal.md 2.9 KB
- 08-page-side-by-side.md 3.6 KB
- 09-icon-swap.md 2.5 KB
- 10-success-check.md 7.5 KB
- 11-avatar-group-hover.md 7.4 KB
- 12-error-state-shake.md 8.6 KB
- 13-input-clear-dissolve.md 11 KB
- 14-skeleton-reveal.md 4.8 KB
- 15-shimmer-text.md 3.2 KB
- 16-tabs-sliding.md 4.7 KB
- 17-tooltip.md 3.4 KB
- 18-texts-reveal.md 3.7 KB
- 19-card-tilt.md 7.8 KB
- 20-plus-menu-morph.md 6.8 KB
- 21-accordion.md 5.3 KB
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.
- 1mo ago First seen · 226 lines · 280 tokens per session scan A 0979309a0df5
transitions-dev is a skill published in the GitHub repository vvedantb/eva (101 stars, last pushed today), licensed MIT. It adds 280 tokens to every session and 5,674 once invoked, about $0.0011 per session on Opus 5.5. 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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