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 PracticalSwan/agent-skills --skill react-view-transitionsgit clone --depth 1 https://github.com/PracticalSwan/agent-skillsWrote 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/practicalswan/agent-skills/react-view-transitions)<a href="https://agentmods.dev/skills/practicalswan/agent-skills/react-view-transitions"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/react-view-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/practicalswan/agent-skills/react-view-transitions"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/react-view-transitions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Prompt Injection · line 333 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
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 | $0.00125 | $0.03852 |
| Opus 5.5 | $0.00050 | $0.01541 |
| Sonnet 5.5 | $0.00025 | $0.00770 |
| Haiku 4.5 | $0.00013 | $0.00385 |
Grade A, and why
react-view-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 2mo 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 — 381 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React View Transitions
Animate between UI states using the browser's native document.startViewTransition. Declare what with <ViewTransition>, trigger when with startTransition / useDeferredValue / Suspense, control how with CSS classes. Unsupported browsers skip animations gracefully.
When to Animate
Every <ViewTransition> should communicate a spatial relationship or continuity. If you can't articulate what it communicates, don't add it.
Implement all applicable patterns from this list, in this order:
| Priority | Pattern | What it communicates |
|---|---|---|
| 1 | Shared element (name) |
"Same thing — going deeper" |
| 2 | Suspense reveal | "Data loaded" |
| 3 | List identity (per-item key) |
"Same items, new arrangement" |
| 4 | State change (enter/exit) |
"Something appeared/disappeared" |
| 5 | Route change (page-level) | "Going to a new place" |
This is an implementation order, not a "pick one" list. Implement every pattern that fits the app. Only skip a pattern if the app has no use case for it.
Choosing Animation Style
| Context | Animation | Why |
|---|---|---|
| Hierarchical navigation (list → detail) | Type-keyed nav-forward / nav-back |
Communicates spatial depth |
| Lateral navigation (tab-to-tab) | Bare <ViewTransition> (fade) or default="none" |
No depth to communicate |
| Suspense reveal | enter/exit string props |
Content arriving |
| Revalidation / background refresh | default="none" |
Silent — no animation needed |
Reserve directional slides for hierarchical navigation (list → detail) and ordered sequences (prev/next photo, carousel, paginated results). For ordered sequences, the direction communicates position: "next" slides from right, "previous" from left. Lateral/unordered navigation (tab-to-tab) should not use directional slides — it falsely implies spatial depth.
Availability
- Next.js: Do not install
react@canary— the App Router already bundles React canary internally.ViewTransitionworks out of the box.npm ls reactmay show a stable-looking version; this is expected. - Without Next.js: Install
react@canary react-dom@canary(ViewTransitionis not in stable React). - Browser support: Chromium 125+ (React needs the v2 object form of
startViewTransition), Firefox 144+, Safari 18.2+. Graceful degradation on unsupported browsers.
What ships with it
9 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.
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.
- 2mo ago Changed · +2 lines f096ea290a55
- 2mo ago Changed 3cbe0b06bb5a
- 2mo ago First seen · 379 lines · 125 tokens per session scan A a7ca6fee8b60
react-view-transitions is a skill published in the GitHub repository PracticalSwan/agent-skills (24 stars, last pushed 18d ago), licensed MIT. It adds 125 tokens to every session and 3,852 once invoked, about $0.0005 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 2026-09-03.
react-view-transitions compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| react-view-transitionsPracticalSwan/agent-skills | Skill | 24 | 18d ago | MIT | A | 125 | Codex |
| Framer MotionLuuOW/meridian-mcp | Skill | 0 | 24d ago | MIT | A | 29 | Claude Code, Codex |
| chakra-ui-builderchakra-ui/chakra-ui | Skill | 41k | yesterday | MIT | A | 214 | Claude Code, Codex |
| tamagui-v6-configtamagui/tamagui | Skill | 14k | today | MIT | A | 0 | Claude Code, Codex |
| tamagui-theme-generatortamagui/tamagui | Skill | 14k | today | MIT | A | 48 | Claude Code, Codex |
| frontend-ui-dark-tsmicrosoft/skills | Skill | 3.2k | yesterday | MIT | A | 48 | Claude Code |
| cobejsMengTo/Skills | Skill | 7.3k | yesterday | MIT | A | 31 | Claude Code, Codex |