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.
Design microservices architectures with service boundaries, event-driven communication, and resilience patterns. Use when building distributed systems, decomposing monoliths, or implementing microservices.
Master ES6+ features including async/await, destructuring, spread operators, arrow functions, promises, modules, iterators, generators, and functional programming patterns for writing clean, efficient JavaScript code. Use when refactoring legacy code, implementing modern patterns, or optimizing JavaScript applications.
The basics of how to program GPUs using Mojo. Use this skill in addition to mojo-syntax when writing Mojo code that targets GPUs or other accelerators. Use targeting code to NVIDIA, AMD, Apple silicon GPUs, or others. Use this skill to overcome misconceptions about how Mojo GPU code is written.
Aids in writing Mojo code that interoperates with Python using current syntax and conventions. Use this skill in addition to mojo-syntax when writing Mojo code that interacts with Python, calls Python libraries from Mojo, or exposes Mojo types/functions to Python. Also use when the user wants to build Python extension modules in Mojo, wrap Mojo structs for Python consumption, or convert between Python and Mojo types.
Help to write Mojo code using current syntax and conventions. Always use this skill when writing any Mojo code, including when other Mojo-specific skills (e.g., mojo-gpu-fundamentals) also apply. Use when writing Mojo code, translating projects to Mojo, or otherwise generating Mojo. Use this skill to overcome misconceptions with how Mojo is written.
NestJS best practices and architecture patterns for building production-ready applications. This skill should be used when writing, reviewing, or refactoring NestJS code to ensure proper patterns for modules, dependency injection, security, and performance.
Creates a new Mojo or MAX project. Use when wanting to start a new Mojo or MAX project, initializing the Pixi or UV environment to use Mojo or MAX, or when the user wants to begin a new Mojo or MAX project from scratch.
Build high-performance native modules for Node.js using Rust and N-API via napi-rs. Use when optimizing compute-intensive operations, integrating system libraries, or requiring native performance without blocking the event loop.
Provides domain-specific best practices for Node.js development with TypeScript, covering type stripping, async patterns, error handling, streams, modules, testing, performance, caching, logging, and more. Use when setting up Node.js projects with native TypeScript support, configuring type stripping (--experimental-strip-types), writing Node 22+ TypeScript without a build step, or when the user mentions 'native TypeScript in Node', 'strip types', 'Node 22 TypeScript', '.ts files without compilation', 'ts-node alternative', or needs guidance on error handling, graceful shutdown, flaky tests, profiling, or environment configuration in Node.js. Helps configure tsconfig.json for type stripping, set up package.json scripts, handle module resolution and import extensions, and apply robust patterns across the full Node.js stack.
Debugs native module crashes, optimizes V8 performance, configures node-gyp builds, writes N-API/node-addon-api bindings, and diagnoses libuv event loop issues in Node.js. Use when working with C++ addons, native modules, binding.gyp, node-gyp errors, segfaults, memory leaks in native code, V8 optimization/deoptimization, libuv thread pool tuning, N-API or NAN bindings, build system failures, or any Node.js internals below the JavaScript layer.
Implements OAuth 2.0/2.1 authorization flows in Fastify applications — configures authorization code with PKCE, client credentials, device flow, refresh token rotation, JWT validation, and token introspection/revocation endpoints. Use when setting up authentication, authorization, login flows, access tokens, API security, or securing Fastify routes with OAuth; also applies when troubleshooting token validation errors, mismatched redirect URIs, CSRF issues, scope problems, or RFC 6749/6750/7636/8252/8628 compliance questions.
Handles git and GitHub operations using the gh CLI. Use when the user asks about pull requests (PRs), GitHub issues, repo management, branching, merging, rebasing, cherry-picking, merge conflict resolution, commit history cleanup, pre-commit hook debugging, GitHub Actions workflows, or releases. Covers creating and reviewing PRs, watching CI checks, interactive rebasing, branch cleanup, submodule management, and repository archaeology with git log/blame/bisect.
Generate and maintain OpenAPI 3.1 specifications from code, design-first specs, and validation patterns. Use when creating API documentation, generating SDKs, or ensuring API contract compliance.
Design a PostgreSQL-specific schema. Covers best-practices, data types, indexing, constraints, performance patterns, and advanced features
Break a PRD into independently-grabbable GitHub issues using tracer-bullet vertical slices. Use when user wants to convert a PRD to issues, create implementation tickets, or break down a PRD into work items.
Write professional press releases for any occasion, media type, and country. Use when the user wants to write, draft, or improve a press release, communiqué de presse, media announcement, news release, or PR statement — including product launches, funding rounds, partnerships, crisis communications, earnings, executive hires, events, M&A, open source milestones, and media advisories. Covers all release types, media targets (print, digital/wire, broadcast, social/SMPR, trade press), and region-specific conventions (Western/Eastern Europe, Americas, Middle East, Africa, Asia, Oceania). Also trigger when the user says 'I need to announce something' or 'how do I tell the press about X.
Set up Prometheus for comprehensive metric collection, storage, and monitoring of infrastructure and applications. Use when implementing metrics collection, setting up monitoring infrastructure, or configuring alerting systems.
CLI for querying Prometheus and PromQL-compatible engines (Thanos, Cortex, VictoriaMetrics, Grafana Mimir, Grafana Tempo...) — instant queries, range queries, metric discovery (metrics/labels/meta subcommands), output formats (table/csv/json/graph). Apply when executing PromQL queries, troubleshooting performance issues on a software having observability, investigating latency/error rates/saturation, or analyzing time series data.
Profile and optimize Python code using cProfile, memory profilers, and performance best practices. Use when debugging slow Python code, optimizing bottlenecks, or improving application performance.
Implement comprehensive testing strategies with pytest, fixtures, mocking, and test-driven development. Use when writing Python tests, setting up test suites, or implementing testing best practices.
Master Rust async programming with Tokio, async traits, error handling, and concurrent patterns. Use when building async Rust applications, implementing concurrent systems, or debugging async code.
Optimizes AI skills for activation, clarity, and cross-model reliability. Use when creating or editing skill packs, diagnosing weak skill uptake, reducing regressions, tuning instruction salience, improving examples, shrinking context cost, or setting benchmark/release gates for skills. Trigger terms: skill optimization, activation gap, benchmark skill, with/without skill delta, regression, context budget, prompt salience.
Transcribe audio to text using ElevenLabs Scribe v2. Use when converting audio/video to text, generating subtitles, transcribing meetings, or processing spoken content.
Master SQL query optimization, indexing strategies, and EXPLAIN analysis to dramatically improve database performance and eliminate slow queries. Use when debugging slow queries, designing database schemas, or optimizing application performance.
Write, optimize, and grow Substack content — both newsletter issues (email-first) and web posts (web-first articles/essays). Covers ghostwriting with voice matching, Substack algorithm optimization, Notes strategy, email formatting, SEO, growth tactics, and monetization planning. Use when the user mentions Substack, newsletters, write a newsletter issue, Substack post, Substack article, web post on Substack, evergreen content, SEO for Substack, newsletter growth, Notes strategy, ghostwrite for, match someone's voice, write in the style of, newsletter monetization, paid subscribers, or any task involving Substack as a platform. Also trigger for general article/newsletter writing even if Substack isn't named explicitly, or when the user wants to adapt existing content (blog post, talk, thread) into newsletter or web post format. Do NOT use for generic blog post writing without a newsletter/Substack context (-> See samber/cc-skills@technical-article-writer skill).
Write compelling technical articles and blog posts for developer audiences. Use this skill whenever the user asks to write a blog post, technical article, or any long-form technical content. Also trigger when the user says 'write about [technical topic]', 'help me draft an article', 'turn this into a blog post', 'write a post about', 'I want to publish something about', or mentions writing for a developer audience. Covers the full pipeline: idea sharpening, hook/title generation, article structure, body drafting, and editing. Even if the user just says 'I want to write about X' without specifying format, use this skill. Do NOT use for platform-specific optimization, newsletter strategy, or ghostwriting voice matching.
Convert text to speech using ElevenLabs voice AI. Use when generating audio from text, creating voiceovers, building voice apps, or synthesizing speech in 70+ languages.
Three.js animation - keyframe animation, skeletal animation, morph targets, animation mixing. Use when animating objects, playing GLTF animations, creating procedural motion, or blending animations.
| dependsOn, caching, remote cache, the "turbo" CLI, --filter, --affected, CI optimization, environment variables, internal packages, monorepo structure/best practices, and boundaries. monorepo, shares code between apps, runs changed/affected packages, debugs cache, or has apps/packages directories.
Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications. Use when implementing complex type logic, creating reusable type utilities, or ensuring compile-time type safety in TypeScript projects.
Designs complex generic types, refactors `any` types to strict alternatives, creates type guards and utility types, and resolves TypeScript compiler errors. Use when the user asks about TypeScript (TS) types, generics, type inference, type guards, removing `any` types, strict typing, type errors, `infer`, `extends`, conditional types, mapped types, template literal types, branded/opaque types, or utility types like `Partial`, `Record`, `ReturnType`, and `Awaited`.
Deep interview process to transform vague ideas into detailed specs. Works for technical and non-technical users.
Convert Product Requirements Documents (PRDs) into functional Figma Make prototype instructions for product and UX design workflows. Use when a user provides a PRD (complete or partial) and needs structured, build-ready guidance for screens, user flows, states, interactions, data behavior, edge cases, and acceptance criteria mapping.
Push a completed L1 PRD, L2 Epic, or L3 Story document to Linear. Parses the doc, creates the appropriate issue type, and maps fields to Linear properties.
PM-focused discovery interview that uncovers the true user problem, measurable friction, and real-life impact before handing off to prd-increment-writer. Use when a PM or stakeholder wants to define a product opportunity, validate a user problem, or kick off a new feature.
Convert a discovery document into a structured PRD-level Epic draft for Linear. Use when a validated product idea is scoped as a larger, complex work item with meaningful UX impact.
Guide users from a rough product idea to a complete, standardized PRD with minimal user input. Use when a user needs Codex to construct a detailed PRD, auto-assign increment metadata, and auto-split child epics mapped to functional requirements and acceptance criteria for downstream Jira planning.
Convert a discovery document into a structured PRD-level Story/Issue draft for Linear. Use when a validated product idea is small, well-understood, and self-contained.
Foundational "High-Density" standard for token-optimized agent instructions and CLI-based automated activation.
Standards for Clean Architecture, Modularization, and Unidirectional Data Flow. Use when anyone sets up Android project structure, asks where code belongs in Clean Architecture layers, discusses modularization (feature/core modules), or questions UDF (events up, state down). (triggers: build.gradle.kts, settings.gradle.kts, clean-architecture, module, layers, domain, UDF, unidirectional, feature module, core module, presentation layer, data layer)
Standards for WorkManager and Background Processing. Use when creating Worker classes, scheduling tasks with WorkManager, choosing between WorkManager and Foreground Services, or setting up Hilt in workers. (triggers: **/*Worker.kt, CoroutineWorker, WorkManager, doWork, PeriodicWorkRequest, OneTimeWorkRequest, @HiltWorker)
Standards for high-performance Declarative UI and State Hoisting. Use whenever writing ANY Jetpack Compose code — @Composable functions, Screen files, LazyColumn, state hoisting, LaunchedEffect, or when someone asks why their Composable recomposes too often. (triggers: **/*Screen.kt, **/*Composable*.kt, **/*Content.kt, @Composable, Modifier, Column, Row, LazyColumn, setContent, recompose, remember, derivedStateOf, LaunchedEffect)
Standards for Coroutines, Flow, and Threading. Use when writing suspend functions, choosing coroutine scopes, switching between StateFlow and SharedFlow, injecting Dispatchers for testability, or debugging threading issues in Android. (triggers: **/*ViewModel.kt, **/*UseCase.kt, **/*Repository.kt, suspend, viewModelScope, lifecycleScope, Flow, coroutine, Dispatcher, DispatcherProvider, GlobalScope)
Standards for App Distribution (Signing, Obfuscation, App Bundles). Use when configuring Release build types, setting up signing configs, enabling R8/ProGuard minification, adding ProGuard keep rules, or preparing an .aab for Play Store submission. (triggers: build.gradle.kts, proguard-rules.pro, signingConfigs, proguard, minifyEnabled, isMinifyEnabled, isShrinkResources, .aab, releaseKeystore)
Enforce Material Design 3 and design token usage in Jetpack Compose apps. Use when implementing M3 components, color schemes, or design tokens in Android. (triggers: **/*Screen.kt, **/ui/theme/**, **/compose/**, MaterialTheme, Color, Typography, Modifier, Composable)
Standards for Hilt Setup, Scoping, and Modules. Use when setting up Hilt dependency injection, component scoping, or modules in Android. (triggers: **/*Module.kt, **/*Component.kt, @HiltAndroidApp, @Inject, @Provides, @Binds)
Standards for Jetpack Navigation Component (XML) and SafeArgs. Use when working with XML-based Navigation Component or SafeArgs in Android. (triggers: navigation/*.xml, findNavController, NavDirections, navArgs)
Standards for Intents, WebViews, and FileProvider. Use when securing Intent handling, WebViews, or FileProvider access in Android. (triggers: **/*Activity.kt, **/*WebView*.kt, AndroidManifest.xml, Intent, WebView, FileProvider, javaScriptEnabled)
Standards for State integration with Views using Coroutines and Lifecycle. Use when managing state with ViewModels and Lifecycle-aware coroutines in Android. (triggers: **/*Fragment.kt, **/*Activity.kt, repeatOnLifecycle, launchWhenStarted)
Standards for Jetpack Navigation Compose (Type-safe). Use when implementing type-safe navigation graphs in Jetpack Compose for Android. (triggers: **/*NavHost.kt, **/*Graph.kt, NavHost, navController, @Serializable)
Claude Skills — questions
Answers built from the skills we actually parsed.