Skills Tailwind CSS V4 Mastery

📦

Tailwind CSS V4 Mastery

Name: Tailwind CSS V4 Mastery
Author: Calel33

v1.0.0 Content revision r1 Medium Risk 🔑 Env variables⚙️ External commands📁 Filesystem access🌐 Network access

Master Tailwind CSS V4 Architecture

Tailwind CSS V4 changes configuration, utilities, browser support, and performance expectations. This skill gives structured migration, component, and optimization guidance for modern frontend teams.

Supports: Claude Codex Code(CC)

📊 70 Adequate

Install with my Agent

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Agent request

Review the Skillstore skill "Tailwind CSS V4 Mastery" from https://skillstore.io/skills/calel33-tailwind-css-v4-mastery.md and its manifest at https://skillstore.io/api/skills/calel33-tailwind-css-v4-mastery/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.

Your Agent should still show its plan and request any confirmation required by the security policy.

Agent-readable resources

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Markdown detail GET /skills/calel33-tailwind-css-v4-mastery.md Signed manifest GET /api/skills/calel33-tailwind-css-v4-mastery/manifest Signed lockfile GET /api/skills/calel33-tailwind-css-v4-mastery/lockfile

Test it

Using "Tailwind CSS V4 Mastery". I need to migrate our dashboard from Tailwind v3 to v4.

Expected outcome:

A phased migration checklist covering dependencies, CSS imports, @theme conversion, and renamed utilities.
A risk list for visual regressions such as borders, ring widths, and opacity utilities.
A validation plan for responsive layouts, dark mode, and build output size.

Using "Tailwind CSS V4 Mastery". Help me create a reusable button and card system in Tailwind V4.

Expected outcome:

A token plan for colors, spacing, typography, and component states.
A component class strategy that separates base styles, variants, and disabled states.
Guidance on when to use utilities directly instead of extracting components.

Using "Tailwind CSS V4 Mastery". My Tailwind build is slower than expected after upgrading.

Expected outcome:

A plugin selection review based on the project build tool.
Checks for excessive @theme variables, unused breakpoints, and source map settings.
A measurement plan for build time, hot reload time, and final CSS size.

Security Audit

Medium Risk

v10 • 7/19/2026 Open versioned report

All 97 static alerts are false positives tied to documentation formatting, CSS patterns, official URLs, a production literal, or expected Bash syntax. Two semantic risks remain: unpinned package installation and broad in-place project rewrites without confirmation. No prompt injection or exfiltration intent was found.

Files scanned

2,242

Lines analyzed

Review items

False positives ignored

Confirmed security concerns (2)

Medium

scripts/migrate-v3-to-v4.sh:53-68

Unpinned Package Installation

The migration script runs npm install with latest packages, allowing network retrieval and dependency lifecycle scripts. Execution changes the target project's dependency graph.

The script directly installs latest Tailwind packages without version pinning, lockfile enforcement, or lifecycle-script restrictions.

Medium

scripts/migrate-v3-to-v4.sh:72-146

Broad In-Place Project Rewrites

The script recursively rewrites matching source files, removes temporary backups, and deletes tailwind.config.js. It lacks a dry run, scope exclusions, and confirmation.

The find, sed, and rm operations clearly mutate the selected project without preserving backups for every changed source file.

Risk Factors

🔑 Env variables (2)

referenes/performance-tuning.md:201 referenes/performance-tuning.md:201

⚙️ External commands (50)

scripts/migrate-v3-to-v4.sh:87 scripts/migrate-v3-to-v4.sh:137 scripts/migrate-v3-to-v4.sh:1 SKILL.md:29 SKILL.md:31 SKILL.md:43-46 SKILL.md:46-61 SKILL.md:61-62 SKILL.md:62 SKILL.md:72-73 SKILL.md:73-89 SKILL.md:89-95 SKILL.md:95-98 SKILL.md:98-101 SKILL.md:101 SKILL.md:102 SKILL.md:103 SKILL.md:106 SKILL.md:107 SKILL.md:108 SKILL.md:109 SKILL.md:118-128 SKILL.md:128-142 SKILL.md:142-159 SKILL.md:159-162 SKILL.md:162-173 SKILL.md:173-176 SKILL.md:176 SKILL.md:177 SKILL.md:178 SKILL.md:199-204 SKILL.md:204-211 SKILL.md:211-216 SKILL.md:216-234 SKILL.md:234-244 SKILL.md:244-248 SKILL.md:248-258 SKILL.md:258-262 SKILL.md:262-272 SKILL.md:272-278 SKILL.md:278-280 SKILL.md:280-281 SKILL.md:281-284 SKILL.md:284 SKILL.md:285-289 SKILL.md:289-290 SKILL.md:290 SKILL.md:291 SKILL.md:293-294 SKILL.md:294-295

📁 Filesystem access (27)

🌐 Network access (4)

SKILL.md:365 SKILL.md:366 SKILL.md:367 SKILL.md:368

Audited by: codex View Audit History →

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Academic citations (APA · BibTeX · CFF)

APA citation

Calel33. (2026). Tailwind CSS V4 Mastery security audit report (audit version 10) [Author version 1.0.0]. Skillstore. https://skillstore.io/skills/calel33-tailwind-css-v4-mastery/audits/10

BibTeX citation

@techreport{calel33-calel33-tailwind-css-v4-mastery-2026,
  author = {Calel33},
  title = {Tailwind CSS V4 Mastery security audit report (audit version 10)},
  institution = {Skillstore},
  year = {2026},
  number = {10},
  url = {https://skillstore.io/skills/calel33-tailwind-css-v4-mastery/audits/10},
  note = {Author version 1.0.0}
}

CITATION.cff

cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "Tailwind CSS V4 Mastery security audit report (audit version 10)"
version: "1.0.0"
type: report
authors:
  - name: "Calel33"
date-released: "2026-07-19"
url: "https://skillstore.io/skills/calel33-tailwind-css-v4-mastery/audits/10"
identifiers:
  - type: other
    value: "skillstore:calel33-tailwind-css-v4-mastery:audit:10"
    description: "Skillstore immutable audit report identifier"

Skillstore Score

Why this score Evidence Confidence: High

Architecture

100

Maintainability

Content

Community

Spec Compliance

What You Can Build

Migrate a Product UI

Plan and execute a Tailwind v3 to v4 migration with utility replacements and validation checks.

Design a Component System

Create theme variables, component classes, and state conventions for reusable Tailwind V4 interfaces.

Improve Build Performance

Choose the right Tailwind V4 plugin and reduce unnecessary theme or breakpoint configuration.

Try These Prompts

Check My Setup

Review my Tailwind CSS V4 setup and tell me if my @import, plugin, and @theme usage are correct.

Plan a Migration

Create a Tailwind v3 to v4 migration plan for my project, including utility renames, config changes, and validation steps.

Build a Theme System

Design a Tailwind V4 theme system with CSS variables, component classes, dark mode, and brand overrides.

Optimize a Large App

Audit my Tailwind V4 build strategy and recommend changes for faster builds, smaller CSS, and better HMR.

Best Practices

Review migration diffs before running automated scripts on production projects.
Keep @theme blocks focused on values that differ from Tailwind defaults.
Test visual changes across responsive, dark mode, and interactive component states.