Claude Code skills: 799 worth installing

Tests local web applications with Playwright: verify frontend behaviour, debug the UI, capture screenshots and read browser logs.

Opens, edits, fixes and creates spreadsheets (.xlsx, .xlsm, .csv, .tsv), including formulas, formatting and charts.

Designs banners for social media, ads, website heroes and print, with several art direction options.

Covers brand voice, visual identity, messaging frameworks and brand consistency for branded content.

Covers design tokens in three layers, CSS variables, spacing and type scales, and component specifications.

Covers brand identity, design tokens, UI styling, logo generation, HTML presentations and banners in one design skill.

Creates HTML presentations with Chart.js, design tokens, responsive layouts and copywriting formulas.

Builds accessible interfaces with shadcn/ui components and Tailwind CSS utility styling.

Migrates React projects and components from Radix UI to Base UI, including shadcn projects.

Manages shadcn/ui components and projects: add, search, fix, style and compose UI, with component docs and examples.

Controls a browser directly over CDP for automation, scraping, testing and screenshots.

QA-tests a website or web app in a browser and returns a 1–5 quality score with evidence.

Controls an isolated Browser Use Cloud browser from a sandboxed machine through the Browser Use CLI.

Tells Claude Code when to delegate to the cavecrew subagents for locating code, small edits and diff review, keeping output compressed.

Writes a Conventional Commits message compressed to the intent of the change.

Compresses a memory file such as CLAUDE.md into caveman format to save input tokens, keeping a readable backup.

Explores a repository read-only to locate code across files and returns path and line citations.

Shows a quick-reference card of caveman modes, skills and commands.

Reviews a diff in compressed form: one line per finding with location, problem and fix.

Shows output and cache-read token usage for the current Claude Code session.

Diagnoses an ambiguous failure before any edit, ranking hypotheses by evidence.

Builds a feature within strict scope, reusing what the repository already has and stopping at an explicit condition.

Implements schema, data, API or dependency migrations that are reversible, with rollback and preservation proof.

Restructures code while preserving behaviour, with verification before and after each structural edit.