What is modus-tailwind-usage-react?

Project rules for using Tailwind CSS version 3 with the Modus design system in a React and Vite application.

Use them when configuring Tailwind, choosing colors and borders, adding shadows, ordering CSS imports, and checking theme support.

They prevent generic or hardcoded colors from breaking the shared visual system and help keep styles working across themes.

modus-tailwind-usage-react — Cursor rule for Cursor by julianoczkowski

Install

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.

Clone the repo

git clone --depth 1 https://github.com/julianoczkowski/create-trimble-app

Made for: Cursor.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/rules/julianoczkowski/create-trimble-app/modus-tailwind-usage-react.svg)](https://agentmods.dev/rules/julianoczkowski/create-trimble-app/modus-tailwind-usage-react)

Your own site

<a href="https://agentmods.dev/rules/julianoczkowski/create-trimble-app/modus-tailwind-usage-react"><img src="https://agentmods.dev/badge/rules/julianoczkowski/create-trimble-app/modus-tailwind-usage-react.svg" alt="Measured on agentmods" height="20"></a>

Per session 0 Nothing until a file matches its globs; then the whole rule loads.

When invoked 4,935 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.04935
Opus 5	$0.00000	$0.02468
Sonnet 5	$0.00000	$0.00987
Haiku 4.5	$0.00000	$0.00494

Measured 4d ago against content hash c6fb1d4e8cfd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

modus-tailwind-usage-react 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 4d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

modus-tailwind-usage-solidjs — 95% identical, 206 lines differ

templates/react/.cursor/rules/modus-tailwind-usage-react.mdc · 643 lines

How it starts

The opening of the file, as written. The whole thing — 643 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tailwind CSS Usage in React + Vite

🎨 Tailwind v3 Integration

CRITICAL: This React + Vite application uses Tailwind CSS v3 (not v4) with Modus Design System integration.

Configuration: Tailwind v3 with design system colors mapped in tailwind.config.js and custom utilities in src/index.css

❌ FORBIDDEN: Generic Tailwind Colors

❌ Never Use Generic Tailwind Color Classes

// ❌ WRONG: Generic Tailwind color classes
className = "bg-blue-500 text-white border-gray-300";
className = "bg-red-400 text-yellow-200 border-green-500";
className = "bg-gray-100 text-black border-purple-300";
className = "bg-indigo-600 text-orange-100 border-pink-400";

❌ Never Use Hardcoded Colors

// ❌ WRONG: Hardcoded colors
className="bg-[#ffffff] text-[#000000] border-[#e5e5e5]"
className="bg-[#3b82f6] text-[#ffffff] border-[#1d4ed8]"
style={{ backgroundColor: "#ffffff", color: "#000000" }}

❌ Never Use Raw Modus Variables

// ❌ WRONG: Raw Modus CSS variables
className="bg-[var(--modus-wc-color-base-page)]"
className="text-[var(--modus-wc-color-base-content)]"
style={{ backgroundColor: "var(--modus-wc-color-base-page)" }}

✅ CORRECT: Design System Colors

✅ Use Design System Tailwind Classes

// ✅ CORRECT: Design system colors
className = "bg-background text-foreground";
className = "bg-card text-card-foreground border border-border";
className = "bg-primary text-primary-foreground hover:bg-primary/90";
className = "bg-secondary text-secondary-foreground hover:bg-secondary/90";
className = "bg-muted text-muted-foreground";
className = "bg-accent text-accent-foreground";
className = "bg-destructive text-destructive-foreground";
className = "bg-warning text-warning-foreground";
className = "bg-success text-success-foreground";

✅ Available Design System Colors

// ✅ CORRECT: All available design system colors
const designSystemColors = {
  // Background colors
  background: "bg-background",
  card: "bg-card",
  popover: "bg-popover",
  sidebar: "bg-sidebar",

  // Text colors
  foreground: "text-foreground",
  "card-foreground": "text-card-foreground",
  "popover-foreground": "text-popover-foreground",
  "sidebar-foreground": "text-sidebar-foreground",

  // Primary colors
  primary: "bg-primary",
  "primary-foreground": "text-primary-foreground",

  // Secondary colors
  secondary: "bg-secondary",
  "secondary-foreground": "text-secondary-foreground",

  // Muted colors
  muted: "bg-muted",
  "muted-foreground": "text-muted-foreground",

  // Accent colors
  accent: "bg-accent",
  "accent-foreground": "text-accent-foreground",

  // Status colors
  destructive: "bg-destructive",
  "destructive-foreground": "text-destructive-foreground",
  warning: "bg-warning",
  "warning-foreground": "text-warning-foreground",
  success: "bg-success",
  "success-foreground": "text-success-foreground",

  // Border colors
  border: "border-border",
  input: "border-input",
  "sidebar-border": "border-sidebar-border",

  // Ring colors
  ring: "ring-ring",
  "sidebar-ring": "ring-sidebar-ring",

  // Chart colors
  "chart-1": "bg-chart-1",
  "chart-2": "bg-chart-2",
  "chart-3": "bg-chart-3",
  "chart-4": "bg-chart-4",
  "chart-5": "bg-chart-5",

  // Sidebar colors
  sidebar: "bg-sidebar",
  "sidebar-foreground": "text-sidebar-foreground",
  "sidebar-primary": "bg-sidebar-primary",
  "sidebar-primary-foreground": "text-sidebar-primary-foreground",
  "sidebar-accent": "bg-sidebar-accent",
  "sidebar-accent-foreground": "text-sidebar-accent-foreground",
  "sidebar-border": "border-sidebar-border",
  "sidebar-ring": "ring-sidebar-ring",
};

Read the full file on GitHub · 643 lines

Changes

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.

4d ago First seen · 643 lines · 0 tokens per session scan A c6fb1d4e8cfd

Subscribe to this mod's changes

modus-tailwind-usage-react is a cursor rule published in the GitHub repository julianoczkowski/create-trimble-app (3 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 4,935 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 2026-09-03.

CSS and styling Frontend cli modus trimble

modus-tailwind-usage-react