Claude Skills
The open format is called Agent Skills and works in Claude Code, Codex, Cursor and other agents — most people know it as Claude Skills.
Every Agent Skill we could find on GitHub, deduplicated by content. 79 437 files from 1 744 authors, of which 61 785 are unique — the rest is the same skill repackaged into someone else's repository. For each one: what it weighs in tokens, whether it ships runnable scripts, and which MCP servers it needs.
Navigation for Android using Jetpack Compose Navigation and App Links. Use when implementing navigation flows, deep links, or backstack handling in Android. (triggers: **/*Screen.kt, **/*Activity.kt, **/NavGraph.kt, NavController, NavHost, composable, navArgument, deepLinks)
Standards for Retrofit, OkHttp, and API Communication. Use when integrating Retrofit, OkHttp, or API clients in Android apps. (triggers: **/*Api.kt, **/*Service.kt, **/*Client.kt, Retrofit, OkHttpClient, @GET, @POST)
Push notifications for Android using Firebase Cloud Messaging and NotificationCompat. Use when integrating FCM or local notifications in Android apps. (triggers: **/*Notification*.kt, **/MainActivity.kt, FirebaseMessaging, NotificationCompat, NotificationChannel, FCM)
Standards for Baseline Profiles, Startup Time, and UI Rendering. Use when optimizing app startup, jank, or UI rendering performance in Android. (triggers: **/*Benchmark.kt, **/*Initializer.kt, BaselineProfile, JankStats, recomposition)
Standards for Room Database and DataStore. Use when implementing Room database schemas or DataStore preferences in Android. (triggers: **/*Dao.kt, **/*Database.kt, **/*Entity.kt, @Dao, @Entity, RoomDatabase)
Standards for Strings, Drawables, and Localization. Use when managing Android resources, drawables, or adding localization support. (triggers: strings.xml, **/*Screen.kt, stringResource, plurals, R.string)
Standards for Data Encryption, Network Security, and Permissions. Load whenever API keys, auth tokens, cleartext traffic, android:exported, EncryptedSharedPreferences, certificate pinning, or root detection come up — even if the user just asks 'is this secure'. (triggers: network_security_config.xml, AndroidManifest.xml, EncryptedSharedPreferences, cleartextTrafficPermitted, intent-filter, api key, token storage, certificate pinning, root detection, secure storage)
Standards for ViewModel, StateFlow, and UI State Patterns. Use whenever someone works with ViewModel files, asks about UiState sealed classes, MutableStateFlow vs LiveData, collectAsStateWithLifecycle, viewModelScope, or exposing state from Android ViewModels — even indirectly. (triggers: **/*ViewModel.kt, **/*UiState.kt, viewmodel, stateflow, livedata, uistate, MutableStateFlow, collectAsState, viewModelScope, UiState)
Standards for Unit Tests, UI Tests (Compose), and Hilt Integration. Use whenever writing Android test files or asking about runTest, composeTestRule, HiltAndroidRule, MockK, MainDispatcherRule, @TestInstallIn, or how to test a ViewModel/Composable/Repository in Android. (triggers: **/*Test.kt, **/*Rule.kt, @Test, runTest, composeTestRule, HiltAndroidTest, MockK, createAndroidComposeRule, MainDispatcherRule, @TestInstallIn)
Standards for Static Analysis (Detekt, Ktlint) and CI/CD Checks. Use when adding or tuning Detekt/Ktlint rules, setting Android Lint as a CI gate, suppressing lint warnings with @Suppress, or configuring code quality checks on pull requests. (triggers: build.gradle.kts, detekt.yml, .detekt/config.yml, detekt, ktlint, lint, @Suppress, abortOnError, jlleitschuh)
Standards for ViewBinding, RecyclerView, and XML Layouts. Use when implementing XML layouts, ViewBinding, or RecyclerView adapters in Android. (triggers: layout/*.xml, **/*Binding.java, **/*Binding.kt, ViewBinding, ConstraintLayout, RecyclerView)
Standards for Angular project structure, feature modules, and lazy loading. Use when structuring Angular apps, defining feature modules, or configuring lazy loading. (triggers: angular.json, angular components, standalone, feature module, lazy loading, loadComponent, loadChildren)
Standards for OnPush components and strict Signals usage. Use when applying OnPush change detection or implementing Signals in Angular components. (triggers: **/*.component.ts, **/*.component.html, ChangeDetectionStrategy, OnPush, Input, Output)
Standards for Standalone Components, Signals inputs, and Control Flow. Use when building standalone Angular components or implementing @if/@for control flow. (triggers: **/*.component.ts, **/*.component.html, angular component, standalone, input signal, output, @if, @for)
Best practices for DI, inject() usage, and providers. Use when configuring Angular dependency injection, using inject(), or defining providers. (triggers: **/*.service.ts, angular inject, providedIn, injection token, provideAppInitializer)
Composition patterns using HostDirectives and Pure Pipes. Use when creating attribute directives with HostDirectives or writing pure pipes in Angular. (triggers: **/*.directive.ts, **/*.pipe.ts, hostDirectives, PipeTransform, pure)
Standards for Typed Reactive Forms and Validators. Use when implementing typed reactive forms, custom validators, or form control patterns in Angular. (triggers: FormBuilder, FormGroup, FormControl, Validators, reactive forms, typed forms)
Best practices for HttpClient, Interceptors, and API interactions. Use when integrating HttpClient, writing interceptors, or handling API calls in Angular. (triggers: **/*.service.ts, **/*.interceptor.ts, HttpClient, HttpInterceptorFn, withInterceptors, httpResource, resource)
Optimization techniques including OnPush, @defer, and Image Optimization. Use when optimizing Angular rendering, deferring blocks, or improving Core Web Vitals. (triggers: ChangeDetectionStrategy.OnPush, @defer, NgOptimizedImage, runOutsideAngular, OnPush)
Standards for Angular Router, Lazy Loading, and Guards. Use when configuring Angular routes, lazy-loaded modules, route guards, or resolvers. (triggers: *.routes.ts, angular router, loadComponent, canActivate, resolver)
Bridging Observables and Signals using toSignal and toObservable. Use when converting between RxJS Observables and Angular Signals. (triggers: toSignal, toObservable, takeUntilDestroyed, rxjs angular)
Security best practices for Angular (XSS, CSP, Route Guards). Use when implementing XSS protection, Content Security Policy, or auth guards in Angular. (triggers: DomSanitizer, innerHTML, bypassSecurityTrust, CSP, angular security, route guard)
Hydration, TransferState, and Prerendering standards. Use when implementing Angular Universal SSR, hydration, or static prerendering. (triggers: **/*.server.ts, server.ts, hydration, transferState, afterNextRender, isPlatformServer, RenderMode)
Signals-based state management and NgRx Signal Store. Use when managing application state with Angular Signals or NgRx Signal Store. (triggers: **/*.store.ts, **/state/**, angular signals, signal store, computed, effect, linkedSignal)
Naming conventions, file structure, and coding standards for Angular projects. Use when naming Angular files, organizing project structure, or following Angular style guide. (triggers: angular style, naming convention, file structure, angular-style-guide)
Standards for Component Test Harnesses and TestBed. Use when writing Angular component tests with TestBed or Component Harnesses. (triggers: **/*.spec.ts, TestBed, ComponentFixture, TestHarness, provideHttpClientTesting)
Angular CLI usage, code generation, build configuration, and bundle optimization. Use when creating Angular projects, generating components/services/guards, configuring builds, running tests, or analyzing bundles. (triggers: angular.json, ng generate, ng build, ng serve, ng test, ng add, angular cli, bundle analysis)
Idiomatic JavaScript patterns and conventions for maintainable code.
Standards for high-quality, persona-driven code reviews. Use when reviewing PRs, critiquing code quality, or analyzing changes for team feedback.
WCAG 2.2, ARIA, semantic HTML, keyboard navigation, and color contrast standards for web UIs. Legal compliance baseline. (triggers: **/*.tsx, **/*.jsx, **/*.html, **/*.vue, **/*.component.html, accessibility, a11y, wcag, aria, screen reader, focus, alt text)
REST API conventions — HTTP semantics, status codes, versioning, pagination, and OpenAPI standards applicable to any framework. (triggers: **/*.controller.ts, **/*.router.ts, **/*.routes.ts, **/routes/**, **/controllers/**, **/handlers/**, rest api, endpoint, http method, status code, versioning, pagination, openapi, api design, api contract)
Protocol for auditing structural debt, logic leakage, and fragmentation across Web, Mobile, and Backend. (triggers: package.json, pubspec.yaml, go.mod, pom.xml, nest-cli.json, architecture audit, code review, tech debt, logic leakage, refactor)
Standards for creating clear, effective, and formalized software architecture diagrams (C4, UML). (triggers: ARCHITECTURE.md, **/*.mermaid, **/*.drawio, diagram, architecture, c4, system design, mermaid)
Universal clean-code principles for any environment. (triggers: **/*.ts, **/*.tsx, **/*.go, **/*.dart, **/*.java, **/*.kt, **/*.swift, **/*.py, solid, kiss, dry, yagni, naming, conventions, refactor, clean code)
Standards for high-quality, persona-driven code reviews. Use when reviewing PRs, critiquing code quality, or analyzing changes for team feedback. (triggers: review, pr, critique, analyze code)
Techniques to maximize context window efficiency, reduce latency, and prevent 'lost in middle' issues through strategic masking and compaction. (triggers: *.log, chat-history.json, reduce tokens, optimize context, summarize history, clear output)
Systematic troubleshooting using the Scientific Method. Use when debugging crashes, tracing errors, diagnosing unexpected behavior, or investigating exceptions. (triggers: debug, fix bug, crash, error, exception, troubleshooting)
Essential rules for code comments, READMEs, and technical docs. Use when adding comments, writing docstrings, creating READMEs, or updating any documentation. (triggers: comment, docstring, readme, documentation)
Cross-cutting standards for error design, response shapes, error codes, and boundary placement. (triggers: **/*.service.ts, **/*.handler.ts, **/*.controller.ts, **/*.go, **/*.java, **/*.kt, **/*.py, error handling, exception, try catch, error boundary, error response, error code, throw)
Pre-write skill violation audit. Checks planned code against loaded skill anti-patterns before any file write. Use when writing Flutter/Dart code, editing SKILL.md files, or generating any code where project skills are active. Load as composite alongside other skills. (triggers: skill violation, pre-write audit, audit violations, SKILL.md, **/*.dart, **/*.ts, **/*.tsx)
Universal standards for version control, branching, and team collaboration. Use when writing commits, creating branches, merging, or opening pull requests. (triggers: commit, branch, merge, pull-request, git)
OWASP LLM Top 10 (2025) audit checklist for AI applications, agent tools, RAG pipelines, and prompt construction. Load during any security review touching LLM client code, prompt templates, agent tools, or vector stores. (triggers: LLM security, prompt injection, agent security, RAG security, AI security, openai, anthropic, langchain, LLM review)
Motion design principles for mobile apps. Covers timing curves, transitions, gestures, and performance-conscious animations. (triggers: **/*_page.dart, **/*_screen.dart, **/*.swift, **/*Activity.kt, **/*Screen.tsx, Animation, AnimationController, Animated, MotionLayout, transition, gesture)
Universal mobile UX principles for touch-first interfaces. Enforces touch targets, safe areas, and mobile-specific interaction patterns. (triggers: **/*_page.dart, **/*_screen.dart, **/*_view.dart, **/*.swift, **/*Activity.kt, **/*Screen.tsx, mobile, responsive, SafeArea, touch, gesture, viewport)
Standards for structured logging, distributed tracing, and metrics. (triggers: **/*.service.ts, **/*.handler.ts, **/*.middleware.ts, **/*.interceptor.ts, **/*.go, **/*.java, **/*.kt, **/*.py, logging, tracing, metrics, opentelemetry, observability, slo)
OWASP Top 10 audit checklist for Web Applications (2021) and APIs (2023). Load during any security review, PR review, or codebase audit touching web, mobile backend, or API code. (triggers: security review, OWASP, broken access control, IDOR, BOLA, injection, broken auth, API review, authorization, access control)
Universal standards for high-performance development. Use when optimizing, reducing latency, fixing memory leaks, profiling, or improving throughput. (triggers: **/*.ts, **/*.tsx, **/*.go, **/*.dart, **/*.java, **/*.kt, **/*.swift, **/*.py, performance, optimize, profile, scalability, latency, throughput, memory leak, bottleneck)
Expert process for gathering requirements and drafting PRDs (Iterative Discovery). Use when creating a PRD, speccing a new feature, or clarifying requirements. (triggers: PRD.md, specs/*.md, create prd, draft requirements, new feature spec)
Standards for Red-Team verification and adversarial protocol audit. Use when verifying tasks, performing self-scans, or checking for protocol violations. Load as composite for all sessions. (triggers: verify done, protocol check, self-scan, pre-write audit, task complete, audit violations, retrospective, scan, red-team)
Adversarial security probing and vulnerability assessments across Node, Go, Dart, Java, Python, and Rust. (triggers: package.json, go.mod, pubspec.yaml, pom.xml, Dockerfile, security audit, vulnerability scan, secrets detection, injection probe, pentest)
Universal security protocols for safe, resilient software. Use when implementing authentication, encryption, authorization, or any security-sensitive feature. (triggers: **/*.ts, **/*.tsx, **/*.go, **/*.dart, **/*.java, **/*.kt, **/*.swift, **/*.py, security, encrypt, authenticate, authorize)
Analyze conversation corrections to detect skill gaps and auto-improve the skills library. Use after any session with user corrections, rework, or retrospective requests. (triggers: **/*.spec.ts, **/*.test.ts, SKILL.md, AGENTS.md, retrospective, self-learning, improve skills, session review, correction, rework)
Standards for creating, testing, and optimizing Agent Skills for any AI Agent (Claude, Cursor, Windsurf, Copilot). Use when: writing SKILL.md, auditing a skill, improving trigger accuracy, checking size limits, structuring references/, writing anti-patterns, starting a new skill from scratch, or reviewing skill quality.
Universal architectural standards for robust, scalable systems. Use when designing new features, evaluating architecture, or resolving scalability concerns. (triggers: architecture, design, system, scalability)
Enforces Test-Driven Development (Red-Green-Refactor). Use when writing unit tests, implementing TDD, or improving test coverage for any feature. (triggers: **/*.test.ts, **/*.spec.ts, **/*_test.go, **/*Test.java, **/*_test.dart, **/*_spec.rb, tdd, unit test, write test, red green refactor, failing test, test coverage)
Create distinctive, production-grade frontend UI with bold aesthetic choices. Use when building web components, pages, interfaces, dashboards, or applications in any framework (React, Next.js, Angular, Vue, HTML/CSS). Triggers: 'build a page', 'create a component', 'design a dashboard', 'landing page', 'UI for', 'build a layout', 'make it look good', 'improve the design', build UI, create interface, design screen
Rules for writing concise, token-efficient workflow and skill files. Prevents over-building that requires costly optimization passes. (triggers: .agent/workflows/*.md, SKILL.md, create workflow, write workflow, new skill, new workflow)
Techniques to maximize context window efficiency, reduce latency, and prevent 'lost in middle' issues through strategic masking and compaction.
Dart code quality conventions: naming, const/final/var hierarchy, single quotes, trailing commas, collection idioms, tear-offs, and import organization. Use when writing new Dart code or reviewing for style violations — wrong import style, global variables, var misuse, anonymous lambdas where tear-offs fit, or missing trailing commas. (triggers: **/*.dart, naming, convention, trailing comma, import, tear-off)
Dart 3.x language feature standards: null safety, records, sealed classes, switch pattern matching, extensions, and async/await. ALWAYS consult when using !, ?., ??, late, sealed classes, record types, switch expressions, or async patterns — and before introducing any new Dart 3.x construct to confirm the modern idiomatic approach. (triggers: **/*.dart, sealed, record, switch, pattern, !, late, async, extension)
Claude Skills — questions
Answers built from the skills we actually parsed.