Home / Use cases / Engineering

AI agents, skills and tools for engineering

6,610 skills, subagents, MCP servers, plugins and prompts for engineering, ranked on usage. Pick a task to narrow it down.

Code review

All 738
github/spec-kitSkill

Reviews Spec Kit code changes for consistency with applicable design documents, positive and negative test coverage, regression evidence for bug fixes, and consistent repository terminology. Use…

142k 16d ago ≈79 tokens always loaded Claude CodeSkills CLI Scanned
99popular
obra/superpowersSkill

Use when receiving code review feedback, before implementing suggestions, especially if feedback seems unclear or technically questionable - requires technical rigor and verification, not…

302k 26d ago ≈64 tokens always loaded Claude CodeSkills CLIGemini CLI Scanned
96popular
mattpocock/skillsSkill

Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes: Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match…

297k 16d ago ≈108 tokens always loaded Claude CodeSkills CLI Scanned
96popular
addyosmani/agent-skillsSubagent

Senior code reviewer that evaluates changes across five dimensions — correctness, readability, architecture, security, and performance. Use for thorough code review before merge.

109k 22d ago ≈48 tokens in your chat Claude Code Scanned
96popular

Testing & QA

All 1444
morluto/reaSkill

Audit REA CI and test suites for correctness, fixture drift, false passes, and measured performance; use for suite or workflow investigations and efficiency changes, rather than ordinary feature…

336k 16d ago ≈62 tokens always loaded Claude CodeSkills CLI Scanned
99popular
feder-cr/invisible_dotsSkill

Use the Dot's browser identities for any task on a website or search on the web: which identity to use, opening and closing one, and when a plain download is simpler than a browser.

32k 16d ago ≈51 tokens always loaded Claude CodeSkills CLI Scanned
97popular
alirezarezvani/claude-skillsPlugin

Playwright Pro turns your AI coding agent into a senior test automation engineer. Instead of generating tutorial-quality tests with brittle CSS selectors, Playwright Pro enforces battle-tested…

29k yesterday Claude Code Scanned · 1 to know
96popular
storybookjs/storybookSkill

Label GitHub issues and PRs found during QA testing. Use when organizing QA findings with proper labels.

91k 16d ago ≈30 tokens always loaded Claude CodeSkills CLI Scanned
91popular

Debugging

All 1158
obra/superpowersSkill

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes

302k 26d ago ≈28 tokens always loaded Claude CodeSkills CLIGemini CLI Scanned
96popular
mattpocock/skillsSkill

Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports something broken/throwing/failing/slow.

297k 16d ago ≈43 tokens always loaded Claude CodeSkills CLI Scanned
96popular
affaan-m/ECCSkill

Structured self-debugging workflow for AI agent failures using capture, diagnosis, contained recovery, and introspection reports. Use when an agent run fails and you need a reproducible diagnosis…

284k 16d ago ≈61 tokens always loaded Claude CodeSkills CLI Scanned
96popular
addyosmani/agent-skillsSkill

Guides systematic root-cause debugging. Use when tests fail, builds break, something that worked yesterday broke, behavior doesn't match expectations, or you encounter any unexpected error. Use when…

109k 22d ago ≈88 tokens always loaded Claude CodeSkills CLI Scanned
91popular

Refactoring

All 355
affaan-m/ECCSubagent

Dead code cleanup and consolidation specialist. Use PROACTIVELY for removing unused code, duplicates, and refactoring. Runs analysis tools (knip, depcheck, ts-prune) to identify dead code and safely…

284k 16d ago ≈57 tokens in your chat Claude Code Scanned
90popular
luongnv89/claude-howtoSkill

Systematic code refactoring based on Martin Fowler's methodology. Use when users ask to refactor code, improve code structure, reduce technical debt, clean up legacy code, eliminate code smells, or…

42k 16d ago ≈86 tokens always loaded Claude CodeSkills CLI Scanned
87popular
tirth8205/code-review-graphSkill

Plan and execute safe refactoring using dependency analysis

32k 19d ago ≈19 tokens always loaded Claude CodeSkills CLI Scanned
87popular
kucherenko/jscpdSkill

Three-part workflow to improve overall codebase health with jscpd — find and fix duplicated code, find and remove or refactor dead code, then find and simplify the largest/most complex files. Starts…

6.4k +40 this week 16d ago ≈74 tokens always loaded Claude CodeSkills CLI Scanned
80popular

Frontend

All 757
Leonxlnx/taste-skillSkill

tasteskill v2, the anti-slop frontend skill. Art direction for websites, distilled from a study of

99k 16d ago ≈30 tokens always loaded Claude CodeSkills CLI Scanned · 2 to know
100popular
TheWidlarzGroup/react-native-videoSkill

Use when a React Native app uses or is choosing the react-native-video library

7.7k +3 this week 16d ago ≈24 tokens always loaded Claude CodeSkills CLI Scanned
92popular

frontend-design

From the maker
anthropics/skillsSkill

Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated…

182k 26d ago ≈55 tokens always loaded Claude CodeSkills CLI Scanned
91popular
affaan-m/ECCSubagent

Diagnose and fix React build failures across Vite, webpack, Next.js, CRA, Parcel, esbuild, and Bun. Handles JSX/TSX compile errors, hydration mismatches, server/client component boundary failures,…

284k 16d ago ≈86 tokens in your chat Claude Code Scanned
90popular

Backend & APIs

All 416
debpalash/VoiceStudioSkill

Expert in FastAPI Python development with best practices for APIs and async operations

77k 16d ago ≈25 tokens always loaded Claude CodeSkills CLI Scanned
94popular
affaan-m/ECCSubagent

Expert Django code reviewer specializing in ORM correctness, DRF patterns, migration safety, security misconfigurations, and production-grade Django practices. Use for all Django code changes. MUST…

284k 16d ago ≈61 tokens in your chat Claude Code Scanned
90popular

backend-code-review

From the maker
langgenius/difySkill

Use only when the user explicitly requests a review or audit of backend code under `api/`. Supports pending-change, file-focused, and pasted-diff reviews. Do not use for implementation-only…

159k 16d ago ≈75 tokens always loaded Claude CodeSkills CLI Scanned
86popular
wshobson/agentsSkill

Create production-ready FastAPI projects with async patterns, dependency injection, and comprehensive error handling. Use when building new FastAPI applications or setting up backend API projects.

41k 16d ago ≈54 tokens always loaded Claude CodeSkills CLI Scanned
86popular

Databases

All 545
supabase/mcpMCP server

MCP server for interacting with the Supabase platform

3.0k +16 this week today Claude CodeCodexCursor+1 Scanned
93popular
affaan-m/ECCSubagent

PostgreSQL database specialist for query optimization, schema design, security, and performance. Use PROACTIVELY when writing SQL, creating migrations, designing schemas, or troubleshooting database…

284k 16d ago ≈67 tokens in your chat Claude Code Scanned
90popular
apache/airflowSkill

Conventions and review steps for writing analytics SQL against the warehouse. Use whenever the task involves querying tables, building a report, or aggregating metrics.

47k 16d ago ≈46 tokens always loaded Claude CodeSkills CLI Scanned
90popular
phuryn/pm-skillsSkill

Generate SQL queries from natural language descriptions. Supports BigQuery, PostgreSQL, MySQL, and other dialects. Reads database schemas from uploaded diagrams or documentation. Use when writing…

27k 19d ago ≈76 tokens always loaded Claude CodeSkills CLI Scanned
85popular

DevOps & cloud

All 1297
calesthio/OpenMontageSkill

Transcribe audio to text using Azure AI Speech (Fast Transcription REST API). Use when converting audio/video to text, generating subtitles, or processing spoken content in OpenMontage. Optional…

70k 19d ago ≈88 tokens always loaded Claude CodeSkills CLI Scanned
90popular
calesthio/OpenMontageSkill

Generate neural narration audio using Azure AI Speech (REST text-to-speech). Use when synthesizing voiceovers or narration in OpenMontage. Optional cloud TTS provider — preferred when…

70k 19d ago ≈83 tokens always loaded Claude CodeSkills CLI Scanned
90popular
mem0ai/mem0Skill

Mem0 provider for Vercel AI SDK (@mem0/vercel-ai-provider).

67k 16d ago ≈20 tokens always loaded Claude CodeSkills CLI Scanned
89popular
zhukunpenglinyutong/jetbrains-cc-guiSkill

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance…

7.1k +172 this week 16d ago ≈89 tokens always loaded Claude CodeSkills CLI Scanned
89popular

Mobile apps

All 334
TheWidlarzGroup/react-native-videoSkill

Use when a React Native app uses or is choosing the react-native-video library

7.7k +3 this week 16d ago ≈24 tokens always loaded Claude CodeSkills CLI Scanned
92popular
affaan-m/ECCSubagent

Kotlin/Gradle build, compilation, and dependency error resolution specialist. Fixes build errors, Kotlin compiler errors, and Gradle issues with minimal changes. Use when Kotlin builds fail.

284k 16d ago ≈53 tokens in your chat Claude Code Scanned
90popular
affaan-m/ECCSubagent

Kotlin and Android/KMP code reviewer. Reviews Kotlin code for idiomatic patterns, coroutine safety, Compose best practices, clean architecture violations, and common Android pitfalls.

284k 16d ago ≈50 tokens in your chat Claude Code Scanned
90popular
SimoneAvogadro/android-reverse-engineering-skillSkill

Decompile Android APK, XAPK, JAR, and AAR files using jadx or Fernflower/Vineflower. Reverse engineer Android apps, extract HTTP API endpoints (Retrofit, OkHttp, Volley), and trace call flows from…

8.2k +137 this week 23d ago ≈106 tokens always loaded Claude CodeSkills CLI Scanned · 2 to know
90popular

Git & GitHub

All 922
NousResearch/hermes-agentSkill

Neutral arbiter for merge conflicts between two agents.

255k 16d ago ≈21 tokens always loaded Claude CodeSkills CLI Scanned
96popular
ruvnet/RuViewSkill

Comprehensive GitHub code review with AI-powered swarm coordination

99k 16d ago ≈22 tokens always loaded Claude CodeSkills CLI Scanned
91popular
ruvnet/RuViewSkill

Multi-repository coordination, synchronization, and architecture management with AI swarm orchestration

99k 16d ago ≈30 tokens always loaded Claude CodeSkills CLI Scanned
91popular
ruvnet/RuViewSkill

Comprehensive GitHub project management with swarm-coordinated issue tracking, project board automation, and sprint planning

99k 16d ago ≈38 tokens always loaded Claude CodeSkills CLI Scanned
91popular

Documentation

All 670
morluto/reaSkill

Prepare or rewrite REA release changelogs and GitHub release notes from pinned Git history, with verified contributor thanks and Release Please synchronization.

336k 16d ago ≈45 tokens always loaded Claude CodeSkills CLI Scanned · 1 to know
99popular
addyosmani/agent-skillsSkill

Records decisions and documentation. Use when you need to document an architecture decision (ADR) or the reasoning behind a design choice, when changing public APIs, shipping features, or when you…

109k 22d ago ≈78 tokens always loaded Claude CodeSkills CLI Scanned
91popular
bytedance/deer-flowSkill

Use this skill when the user requests to generate, create, or improve documentation for code, APIs, libraries, repositories, or software projects. Supports README generation, API reference…

84k 16d ago ≈121 tokens always loaded Claude CodeSkills CLI Scanned
90popular
apache/airflowSkill

Replace the manual commit-by-commit classification step in

47k 16d ago ≈23 tokens always loaded Claude CodeSkills CLI Scanned
90popular

Architecture

All 159
ML-SystemDesign/MLSystemDesignSkill

Use when reviewing ML system design docs, ML/AI project repos, design-doc PRs, RAG/LLM/foundation-model architectures, agentic AI workflows, or production ML readiness. Applies the ML System Design…

886 +3 this week 2mo ago ≈95 tokens always loaded Claude CodeSkills CLI Scanned
68popular
levnikolaevich/claude-code-skillsSkill

Defines measurable architecture drivers and constraints before system design; edits architecture docs only.

582 +6 this week 17d ago ≈36 tokens always loaded Claude CodeSkills CLI Scanned
66popular
decebals/claude-code-javaSkill

Common design patterns with Java examples (Factory, Builder, Strategy, Observer, Decorator, etc.). Use when user asks "implement pattern", "use factory", "strategy pattern", or when designing…

758 +9 this week 2mo ago ≈58 tokens always loaded Claude CodeSkills CLI Scanned
63popular
rohitg00/awesome-claude-code-toolkitSubagent

Distributed systems design with event-driven architecture, saga patterns, service mesh, and observability

2.7k +24 this week 6mo ago ≈32 tokens in your chat Claude Code Scanned
59popular

AI engineering

All 352
affaan-m/ECCSkill

Head-to-head comparison of coding agents (Claude Code, Aider, Codex, etc.) on custom tasks with pass rate, cost, time, and consistency metrics. Use when choosing between coding agents, or when a…

284k 16d ago ≈75 tokens always loaded Claude CodeSkills CLI Scanned
96popular
colbymchenry/codegraphSkill

Benchmark CodeGraph retrieval quality on a real codebase by comparing agent behavior with vs without CodeGraph. Use when the user runs /agent-eval or asks to test, benchmark, audit, or validate a…

74k 16d ago ≈75 tokens always loaded Claude CodeSkills CLI Scanned
96popular
promptfoo/promptfooPlugin

Teaches AI coding agents to create and maintain promptfoo eval suites. Encodes best practices like deterministic assertions first, file-based test organization, correct environment variable syntax,…

27k today Claude Code Scanned
96popular
diegosouzapw/OmniRouteSkill

Create and run evaluation suites, watch live benchmark progress, view scorecards, compare model performance, and integrate eval runs with CI workflows from the CLI.

79k 16d ago ≈43 tokens always loaded Claude CodeSkills CLI Scanned · 1 to know
90popular