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.
git clone --depth 1 https://github.com/RoninForge/roninforge-tailwind-v4Wrote 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/rules/roninforge/roninforge-tailwind-v4/tailwind-v4-utilities)<a href="https://agentmods.dev/rules/roninforge/roninforge-tailwind-v4/tailwind-v4-utilities"><img src="https://agentmods.dev/badge/rules/roninforge/roninforge-tailwind-v4/tailwind-v4-utilities/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/rules/roninforge/roninforge-tailwind-v4/tailwind-v4-utilities"><img src="https://agentmods.dev/badge/rules/roninforge/roninforge-tailwind-v4/tailwind-v4-utilities.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 | $0.00000 | $0.01692 |
| Opus 5.5 | $0.00000 | $0.00677 |
| Sonnet 5.5 | $0.00000 | $0.00338 |
| Haiku 4.5 | $0.00000 | $0.00169 |
Grade A, and why
tailwind-v4-utilities 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 — 219 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tailwind v4 Utility Classes
These rules apply when writing markup with Tailwind utility classes.
Utility Renames Quick Reference
When you are about to write any of these v3 classes, use the v4 replacement instead:
| Instead of (v3) | Write (v4) |
|---|---|
shadow-sm |
shadow-xs |
shadow |
shadow-sm |
blur-sm |
blur-xs |
blur |
blur-sm |
rounded-sm |
rounded-xs |
rounded |
rounded-sm |
outline-none |
outline-hidden (preferred; outline-none still works but lacks forced-colors support) |
overflow-ellipsis |
text-ellipsis |
flex-grow |
grow |
flex-grow-0 |
grow-0 |
flex-shrink |
shrink |
flex-shrink-0 |
shrink-0 |
ring (bare) |
ring-3 (explicit width, v3 default was 3px) |
border (bare, for gray) |
border border-gray-200 (explicit) |
transform scale-75 |
scale-75 (no transform prefix) |
transform-none |
scale-100 rotate-0 translate-x-0 translate-y-0 skew-x-0 skew-y-0 |
Opacity Always Uses the / Modifier
<!-- Background opacity -->
<div class="bg-black/50"></div>
<div class="bg-blue-500/75"></div>
<!-- Text opacity -->
<p class="text-white/80"></p>
<!-- Border opacity -->
<div class="border border-gray-300/50"></div>
<!-- Ring opacity -->
<div class="ring-2 ring-blue-500/50"></div>
Never use bg-opacity-*, text-opacity-*, border-opacity-*, or any other -opacity- utility.
Container Queries (Built-in)
Container queries are native in v4 - no plugin needed:
<div class="@container">
<div class="grid grid-cols-1 @sm:grid-cols-2 @lg:grid-cols-3">
<div class="p-4">Responsive to container, not viewport</div>
</div>
</div>
Named containers:
<div class="@container/sidebar">
<div class="@sm/sidebar:grid-cols-2">...</div>
</div>
Available sizes: @3xs (8rem), @2xs (12rem), @xs (16rem), @sm (20rem), @md (24rem), @lg (28rem), @xl (32rem), @2xl (36rem), @3xl (40rem), @4xl (44rem), @5xl (48rem), @6xl (52rem), @7xl (56rem).
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 · 219 lines · 0 tokens per session scan A c12751af2039
tailwind-v4-utilities is a cursor rule published in the GitHub repository RoninForge/roninforge-tailwind-v4 (2 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,692 tokens. 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 2026-08-31.
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