Use when configuring Tailwind CSS, migrating CSS-first themes or tuning utility generation, dark mode and container queries. Not for component API composition or a general visual-design review.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Tailwind Labs Tailwind CSS v4 Best Practices
Comprehensive performance optimization guide for Tailwind CSS v4 applications, maintained by Tailwind Labs. Contains 42 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.
## When to Apply
Reference these guidelines when:
- Configuring Tailwind CSS v4 build tooling (Vite plugin, PostCSS, CLI)
- Writing or migrating styles using v4's CSS-first approach
- Optimizing CSS bundle size and build performance
- Implementing responsive designs with breakpoints or container queries
- Setting up theming with @theme directive and design tokens
## Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|----------|----------|--------|--------|
| 1 | Build Configuration | CRITICAL | `build-` |
| 2 | CSS Generation | CRITICAL | `gen-` |
| 3 | Bundle Optimization | HIGH | `bundle-` |
| 4 | Utility Patterns | HIGH | `util-` |
| 5 | Component Architecture | MEDIUM-HIGH | `comp-` |
| 6 | Theming & Design Tokens | MEDIUM | `theme-` |
| 7 | Responsive & Adaptive | MEDIUM | `resp-` |
| 8 | Animation & Transitions | LOW-MEDIUM | `anim-` |
## Quick Reference
…
The line at the top of this page pins the label git:20261026.fc845e3, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (6798 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
cratis/ai · 4 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wlm46fl23dhazmv4
GET https://markdownregistry.com/api/v1/resolve?ref=cratis/ai/tailwind
GET https://markdownregistry.com/api/v1/blob/a8d5bf509f350f2366cdade4061e92fd6bbaae7c7d62188279265743175861fa
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
cratis/ai · .cratis/ai/skills/analyzing-dotnet-performance/SKILL.md · Use when reviewing .NET hot paths or scanning source for allocation-heavy and inefficient patterns. Not for measuring a…
cratis/ai · .cratis/ai/skills/binlog-generation/SKILL.md · Use when an MSBuild failure or performance investigation needs a binary log and none exists. Not for analyzing existing…
cratis/ai · .cratis/ai/skills/check-bin-obj-clash/SKILL.md · Use when multi-project or multi-targeted MSBuild builds collide in bin, obj or project.assets.json, overwrite outputs…
cratis/ai · .cratis/ai/skills/coverage-analysis/SKILL.md · Use when interpreting supplied .NET coverage evidence or an explicit coverage-collection request. Not for hypothetical…
cratis/ai · .cratis/ai/skills/cratis-application-react-specifications/SKILL.md · Write specifications for the React and TypeScript surface of a Cratis application slice — view models, helpers, command…
cratis/ai · .cratis/ai/skills/cratis-application-slice-conformance/SKILL.md · Reconcile a Cratis slice's hand-written or gap-filled code and specifications with its contract (the `.play` slice and…
cratis/ai · .cratis/ai/skills/cratis-application-slice-specifications/SKILL.md · Specify the backend behavior of an event-sourced Cratis application slice — plain-call specs for pure decisions, plus…
cratis/ai · .cratis/ai/skills/cratis-arc-authentication-authorization-and-identity/SKILL.md · Wire authentication, authorization and identity in a Cratis Arc application — IProvideIdentityDetails and the…
cratis/ai · .cratis/ai/skills/cratis-arc-command-execution/SKILL.md · Execute an existing Cratis Arc command from backend code through ICommandPipeline — the scopeless and scoped overloads…
cratis/ai · .cratis/ai/skills/cratis-arc-command-kotlin/SKILL.md · Define a Cratis Arc command in Kotlin or Java — the @Command class, its handle() method, the optional provide() step…
cratis/ai · .cratis/ai/skills/cratis-arc-command-operation/SKILL.md · Declare immediate inline work as a Cratis Arc ICommandOperation returned by a model-bound command, with optional…
nahid-sparktales/agent-dispatcher · skills/frontend/tailwind/SKILL.md · Work inside an existing Tailwind codebase without degrading it — use the project's theme tokens instead of arbitrary…
anton-abyzov/vskill · .claude/skills/tailwind/SKILL.md · Tailwind CSS v4.2 browser-runtime patterns for HyperFrames compositions. Use when scaffolding or editing projects…
frankxai/claude-skills-library · free-skills/tailwind/SKILL.md · Tailwind CSS v4.2 browser-runtime patterns for HyperFrames compositions. Use when scaffolding or editing projects…
gaia-react/gaia · apps/web/.claude/skills/tailwind/SKILL.md · Applies GAIA's patterns and conventions for all Tailwind styling. Use this skill whenever writing Tailwind class names…
gaia-harness/gaia · apps/web/.claude/skills/tailwind/SKILL.md · Applies GAIA's patterns and conventions for all Tailwind styling. Use this skill whenever writing Tailwind class names…
