Java & JVM Skills

Skills for Java and JVM ecosystem development. From Spring Boot applications to Kotlin DSLs and Gradle build scripts, these skills help Claude Code work with enterprise Java stacks.

95 skills

remotion-render

inferen-sh/skills+1 more

96.6k

173

Turns React TSX code into MP4 videos using Remotion's animation APIs. Feed it a component with useCurrentFrame, interpolate, or spring animations and get back a rendered video file. Perfect for generating programmatic content like animated charts, social media clips, or motion graphics where you need precise control over timing and React-style composition. The CLI handles the heavy lifting of bundling and rendering through inference.sh, so you skip the local Remotion setup. Works well for automating video creation pipelines or building dynamic content that changes based on data inputs.

azure-messaging

microsoft/github-copilot-for-azure

92.4k

160

Azure-messaging provides troubleshooting guidance for developers experiencing issues with Azure Event Hubs and Service Bus SDKs across multiple languages (Python, Java, JavaScript, .NET). It diagnoses and resolves connection failures, authentication errors, message lock expirations, session timeouts, AMQP link detachments, and SDK configuration problems using Azure MCP tools for resource inspection and diagnostic log queries. The skill solves problems where messaging SDK clients fail to connect, process messages, or maintain stable connections by providing a structured diagnosis workflow that matches errors to language-specific solutions and Microsoft Learn documentation.

seo-audit

coreyhaines31/marketingskills

78.7k

21.4k

Claude runs a systematic SEO audit covering crawlability, technical foundations, on-page optimization, and content quality. It checks robots.txt, sitemaps, Core Web Vitals, title tags, heading structure, and internal linking while flagging common issues like duplicate content, canonicalization problems, and keyword cannibalization. The skill includes a helpful warning about schema markup detection limitations since web_fetch can't see JavaScript-injected structured data. It adapts the audit scope based on your site type and provides actionable recommendations in priority order. Good for diagnosing traffic drops, pre-launch reviews, or comprehensive health checks when you suspect SEO issues but aren't sure where to start looking.

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optimize

pbakaus/impeccable+1 more

65.6k

19.4k

When your app feels sluggish or users complain about slow loading, this skill systematically diagnoses performance bottlenecks across Core Web Vitals, bundle sizes, and rendering issues. It provides specific fixes like image optimization with proper srcset attributes, JavaScript code splitting strategies, and CSS containment rules. The skill emphasizes measurement-driven optimization, helping you identify whether the problem is initial load time, interaction lag, or layout shifts. It covers React-specific optimizations like memo and useMemo, plus framework-agnostic techniques for smooth 60fps animations and efficient API calls.

tailwind-design-system

wshobson/agents+4 more

33.4k

33.7k

Builds component libraries with Tailwind v4's new CSS-first configuration, swapping out the old JavaScript config for @theme blocks and native CSS variables. Generates CVA-based components with proper variant handling, sets up semantic design tokens using OKLCH color space, and implements dark mode with @custom-variant instead of the old class strategy. Most useful when migrating from v3 or starting fresh design systems where you need consistent theming across components. The OKLCH color approach alone makes this worth using since it handles color perception way better than HSL, and the CSS-first config eliminates a lot of build complexity.

firecrawl-scrape

firecrawl/cli+1 more

20.2k

299

The firecrawl-scrape skill extracts clean, LLM-optimized markdown from any URL, handling both static pages and JavaScript-rendered single-page applications. It's designed for developers and AI agents who need to retrieve and process webpage content programmatically, solving the problem of obtaining usable text from complex modern websites that traditional web fetching tools struggle with. The skill supports multiple concurrent URL scraping, content filtering options, and can optionally answer questions about the extracted content.

turborepo

vercel/turborepo

19k

30.2k

This skill helps you properly configure and use Turborepo for JavaScript monorepos. It triggers when working with turbo.json, task pipelines, caching configuration, and monorepo structure. The main value is enforcing correct patterns like creating package-level tasks instead of root-level scripts, using "turbo run" in code versus the shorthand, and setting up proper dependency graphs with dependsOn. It covers practical scenarios like debugging cache misses, running only affected packages with --affected, configuring remote caching for CI, and structuring apps versus packages directories. Most developers initially misconfigure task organization, so the guidance on package tasks versus root tasks saves significant debugging time.

create-auth-skill

better-auth/skills

15.2k

177

The create-auth-skill guides developers in adding Better Auth authentication to TypeScript/JavaScript applications by detecting their framework, database setup, and existing dependencies, then scaffolding the appropriate configuration, database adapters, route handlers, and OAuth providers. It solves the problem of setting up production-ready authentication from scratch or migrating to Better Auth by automating detection and asking structured planning questions before implementation. The skill serves full-stack developers building new or existing projects who need login, sign-up, and authentication features with minimal manual configuration.

lark-whiteboard-cli

larksuite/cli

14.5k

7.9k

This tool generates Lark (Feishu) whiteboard diagrams from natural language requests using either a custom DSL or Mermaid syntax. It automatically chooses the right rendering path based on diagram type, handles layout calculations through JavaScript scripts for complex visualizations like fishbone or flywheel charts, and outputs both PNG files and uploadable whiteboard tokens. The workflow includes mandatory pre-flight checks to prevent overwriting existing whiteboards and built-in visual validation to catch common issues like text truncation or overlapping nodes. Best for teams already using Lark who need programmatic diagram generation with precise layout control.

vitest

antfu/skills+1 more

14k

4.6k

Vitest is a next-generation unit testing framework powered by Vite that provides a Jest-compatible API with native support for ESM, TypeScript, and JSX. It serves developers who want fast test execution with HMR-like updates, smart watch mode, and parallel test execution while leveraging their existing Vite configuration. The skill solves the problem of needing a modern testing setup that shares tooling with Vite apps and eliminates configuration overhead for contemporary JavaScript projects.

claude-api

anthropics/skills

13.1k

118.1k

The claude-api skill enables developers to build LLM-powered applications using Claude and Anthropic's SDKs across multiple programming languages (Python, TypeScript, Java, Go, Ruby, C#, and PHP). It automatically detects the user's project language and provides relevant API documentation, code examples, and implementation guidance, triggering when code imports Anthropic libraries or the user explicitly requests Claude API assistance. This skill solves the problem of navigating language-specific SDK differences and finding appropriate documentation by centralizing Claude integration guidance across diverse tech stacks.

vercel-react-view-transitions

vercel-labs/agent-skills

12.7k

25.2k

A comprehensive guide for React's native View Transition API that covers the full implementation workflow from audit to deployment. Shows you how to animate route changes, shared elements, and component states using browser-native transitions instead of JavaScript animation libraries. Includes CSS recipes for common patterns like directional navigation and list reordering, plus specific guidance on transition types and Suspense integration. The implementation order and "when to animate" framework helps you avoid over-animating while ensuring transitions actually communicate spatial relationships. Works out of the box with Next.js App Router.

java-springboot

github/awesome-copilot+23 more

12.2k

29.9k

The java-springboot skill provides developers with comprehensive best practices for building Spring Boot applications, covering project structure, dependency injection, configuration management, web layer design, service layer patterns, data access, and logging. It serves Java developers who want to write maintainable, testable, and production-ready Spring Boot applications by following established conventions for component organization, externalized configuration, RESTful API design, and transaction management. The skill solves the problem of inconsistent application architecture and quality by establishing clear guidelines across all layers of a Spring Boot application.

fixing-motion-performance

ibelick/ui-skills

12.1k

1.3k

The skill audits and fixes animation performance issues including layout thrashing, compositor property misuse, scroll-linked motion problems, and inefficient filter effects across CSS and JavaScript animations. It serves developers and designers who need to diagnose and resolve stuttering animations, janky transitions, or performance bottlenecks in UI motion work. The skill identifies violations against nine rule categories—from critical never-patterns like interleaving layout reads and writes to medium-priority issues like unnecessary blur effects—and provides concrete code-level fixes without requiring animation library migrations.

java-spring-boot

pluginagentmarketplace/custom-plugin-java+1 more

10.4k

Covers the full Spring Boot stack from REST controllers to security configuration to JPA repositories. Generates proper SecurityFilterChain configs, sets up exception handlers with ProblemDetail, and includes Actuator monitoring endpoints. The examples show modern Spring Boot 3.x patterns like record-based DTOs and functional security configuration. Really useful when you need to spin up production-ready APIs quickly without hunting down boilerplate. The troubleshooting section alone saves time by covering the usual suspects like circular dependencies and security misconfigurations that always seem to trip people up.

develop-userscripts

xixu-me/skills

10.3k

Helps you build browser userscripts for Tampermonkey and ScriptCat without getting stuck on the metadata and runtime boundaries where most scripts break. It guides you through choosing between foreground page scripts and ScriptCat background workers, sets up the right @match/@grant/@connect permissions from the start, and handles ScriptCat-specific features like @crontab scheduling and ==UserConfig== blocks. The real value is in the debugging workflow and permission troubleshooting since userscripts fail differently than regular JavaScript. If you're fighting CSP issues, missing GM_xmlhttpRequest permissions, or trying to package subscription bundles, this cuts through the trial-and-error cycle.

react-native-best-practices

callstackincubator/agent-skills

10.2k

1.2k

The react-native-best-practices skill provides React Native developers with performance optimization guidelines covering JavaScript, native code, and bundling across FPS, time-to-interactive, bundle size, memory leaks, and animation issues. It applies to tasks involving Hermes optimization, JS thread blocking, native modules, and debugging frame drops or jank. The skill solves performance problems by offering quick patterns, commands, and configurations with impact ratings, organized by priority from critical rendering issues to medium-priority animations.

gemini-api-dev

google-gemini/gemini-skills

9.8k

3.2k

The gemini-api-dev skill provides guidance for developers building applications with Google's Gemini models and APIs, covering SDK usage across Python, JavaScript/TypeScript, Go, and Java, as well as multimodal content handling, function calling, and structured outputs. It solves the problem of outdated knowledge by specifying current model versions (gemini-3.1-pro-preview, gemini-3-flash-preview, and others) and current SDKs while explicitly warning against deprecated alternatives. This skill is for software engineers who need accurate, up-to-date information when implementing Gemini-powered features.

flutter-animating-apps

flutter/skills+2 more

7.1k

1.1k

Handles the full spectrum of Flutter animations from simple implicit tweens to complex physics-based motion. It walks you through the decision tree of when to use AnimatedContainer versus AnimationController, sets up proper disposal patterns to prevent memory leaks, and covers staggered animations with interval curves. The workflows are solid for avoiding the common pitfalls like forgetting vsync or mismatching Hero tags. Most helpful when you're past basic animations and need to coordinate multiple properties or implement gesture-driven spring physics. The examples show real patterns you'll actually use, not just bouncing balls.

frontend-code-review

langgenius/dify

6.8k

137.9k

A structured frontend code reviewer that runs your TypeScript, JavaScript, and TSX files through a comprehensive checklist covering code quality, performance, and business logic issues. It handles two modes: reviewing staged changes before commits or analyzing specific files you point to. The output is consistently formatted with urgent issues flagged separately from suggestions, complete with file paths, line numbers, and actionable fixes. Each violation gets tagged with urgency metadata for prioritization. After finding issues that need code changes, it offers to automatically apply the suggested fixes, making it a complete review-and-remediate workflow rather than just a linting tool.

insforge

insforge/agent-skills

Handles frontend integration with InsForge's backend services through their JavaScript SDK. Covers the usual suspects: database CRUD operations, authentication flows, file uploads, AI API calls, real-time WebSocket subscriptions, and edge function invocations. The skill walks through environment variable setup for different frameworks (Next.js uses NEXT_PUBLIC_ prefixes, Vite uses VITE_, etc.), client initialization patterns, and includes RLS policy examples for database security. Honestly pretty comprehensive for a BaaS integration guide. You'd reach for this when building client-side features that need to talk to InsForge's managed services rather than setting up your own backend infrastructure.

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FAQ

Does Claude Code support Java development?

Yes — Java skills teach Claude Spring Boot patterns, JPA/Hibernate usage, Gradle/Maven configuration, and enterprise Java best practices.

Related categories

Backend & APIs1170 Testing & QA839 DevOps & CI/CD683