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 oxy-hq/oxygen --skill vercel-react-view-transitionsgit clone --depth 1 https://github.com/oxy-hq/oxygenWrote 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/oxy-hq/oxygen/vercel-react-view-transitions)<a href="https://agentmods.dev/skills/oxy-hq/oxygen/vercel-react-view-transitions"><img src="https://agentmods.dev/badge/skills/oxy-hq/oxygen/vercel-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/oxy-hq/oxygen/vercel-react-view-transitions"><img src="https://agentmods.dev/badge/skills/oxy-hq/oxygen/vercel-react-view-transitions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00127 | $0.02260 |
| Opus 5.5 | $0.00051 | $0.00904 |
| Sonnet 5.5 | $0.00025 | $0.00452 |
| Haiku 4.5 | $0.00013 | $0.00226 |
Grade A, and why
vercel-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 2d 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 — 275 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 (layout-level) | "Going to a new place" |
This is an implementation order, not a "pick one" list. Most apps need #1–#3 at minimum. Only skip a pattern if the app has no use case for it. Only one tree level should animate at a time — adding a layout-level transition on top of per-page animations produces competing double-animation.
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 only. Directional slides on sibling links falsely imply spatial depth.
Availability
- Requires
react@canaryorreact@experimental— not in stable React (including 19.x). Verify withnpm ls react. - Browser support: Chromium 111+, Firefox 144+, Safari 18.2+. Graceful degradation on unsupported browsers.
What ships with it
6 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.
- 2d ago First seen · 275 lines · 127 tokens per session scan A 69e478f11d9b
vercel-react-view-transitions is a skill published in the GitHub repository oxy-hq/oxygen (203 stars, last pushed yesterday), licensed Apache-2.0. It adds 127 tokens to every session and 2,260 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 2026-10-14.
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