Development Claude Skills
8 673 development skills from 759 authors. They write and change code. Half of them fit into 1 830 tokens or less — that is what one costs your context window when the agent loads it. 1 213 ship runnable scripts rather than instructions alone. 42 of them cannot work without an MCP server, most often rube. We also found 1 239 copies of these same skills sitting in other people's repositories — counted once here, not 1 239 times.
8 673 unique 759 authors 10 updated this month 1 368 from vendors
Techniques for analyzing existing codebases to reverse-engineer requirements and understand business logic. Use when conducting brownfield analysis or understanding existing system capabilities.
SOLID principles adapted for functional and TypeScript-first development.
Master protocol for deconstructing agent frameworks to inform derivative system architecture. Use when (1) analyzing an agent framework's codebase comprehensively, (2) comparing multiple frameworks to select best practices, (3) designing a new agent system based on prior art, (4) documenting architectural decisions with evidence, or (5) conducting technical due diligence on AI agent implementations. This skill orchestrates sub-skills for data substrate, execution engine, cognitive architecture, and synthesis phases.
Repository structure and dependency analysis for understanding a codebase's architecture. Use when needing to (1) generate a file tree or structure map, (2) analyze import/dependency graphs, (3) identify entry points and module boundaries, (4) understand the overall layout of an unfamiliar codebase, or (5) prepare for deeper architectural analysis.
Evaluate extensibility patterns, abstraction layers, and configuration approaches in frameworks. Use when (1) assessing base class/protocol design, (2) understanding dependency injection patterns, (3) evaluating plugin/extension systems, (4) comparing code-first vs config-first approaches, or (5) determining framework flexibility for customization.
Extract and analyze agent reasoning loops, step functions, and termination conditions. Use when needing to (1) understand how an agent framework implements reasoning (ReAct, Plan-and-Solve, Reflection, etc.), (2) locate the core decision-making logic, (3) analyze loop mechanics and termination conditions, (4) document the step-by-step execution flow of an agent, or (5) compare reasoning patterns across frameworks.
Analyze fundamental data primitives, type systems, and state management patterns in a codebase. Use when (1) evaluating typing strategies (Pydantic vs TypedDict vs loose dicts), (2) assessing immutability and mutation patterns, (3) understanding serialization approaches, (4) documenting state shape and lifecycle, or (5) comparing data modeling approaches across frameworks.
Assess error handling, isolation boundaries, and recovery mechanisms in agent frameworks. Use when (1) tracing error propagation paths, (2) evaluating sandboxing for code execution, (3) understanding retry and fallback mechanisms, (4) assessing production readiness, or (5) identifying failure modes and recovery patterns.
Design APIs using schema-first approach with OpenAPI/Swagger. Use when creating new APIs, documenting existing ones, or when frontend/backend teams need to work in parallel. Covers OpenAPI spec, validation, and code generation.
Generate user-friendly release notes from git commits. Use this when preparing releases, writing changelogs, or summarizing development progress.
Enforce dependency security scanning and SBOM generation. Use when adding dependencies, reviewing package.json, or during security audits. Covers OWASP dependency check, npm audit, and supply chain security.
Enforce proper error handling patterns. Use when writing async code, API calls, or user-facing features. Covers try-catch, error boundaries, graceful degradation, and user feedback.
Complete Git workflow from conventional commits to pre-completion verification. Use for all Git operations including commits, branches, and releases.
Organize project folders following industry best practices. Use when setting up new projects, reorganizing codebases, or when folder structure becomes messy. Covers Next.js, Bulletproof React, and FSD patterns.
Write developer-oriented README as onboarding documentation. Use when creating/updating README, setting up new projects, or when new developers need to understand the codebase quickly. README = Entry point + Architecture overview + Working agreement.
Enforce TypeScript strict mode and type safety. Use when setting up projects, reviewing code, or when type errors are ignored. Covers strict flags, no-any rules, and type inference best practices.
Create isolated git worktrees with smart directory selection and safety verification. Use this when starting feature work that needs isolation, parallel development, or safe experimentation.
Check and create virtual environments for projects that need them. Use when starting Python/Node projects, or when dependency isolation is needed. Activates for Python, Node.js, and similar ecosystems.
Documentation for the htmx JavaScript library (attributes, events, headers, API, extensions, examples, migration guides, server examples). Use when you need accurate htmx syntax/behavior or to locate the right reference page for an htmx question.
Documentation for the htmx JavaScript library (attributes, events, headers, API, extensions, examples, migration guides, server examples). Use when you need accurate htmx syntax/behavior or to locate the right reference page for an htmx question.
Generate high-quality, minimalistic, and geometric SVG logos using Python scripts. Use this skill when users need to create logos, icons, or visual identities with geometric primitives (circles, rects, paths) and specific color schemes. Applies generative design principles with standardized workflows for scalable SVG output.
工作文档枢纽，强制执行 SSOT（Single Source of Truth）原则，管理 `docs/` 目录下的架构决策、设计文档、Issues（任务规划）、PRs（变更记录）。支持 GitHub 协作开发模式。
Use when design is complete and you need detailed implementation tasks for engineers with zero codebase context - creates comprehensive implementation plans with exact file paths, complete code examples, and verification steps assuming engineer has minimal domain knowledge
Use when the user explicitly asks for a SKILL to create a worktree. If the user does not mention "skill" or explicitly request skill invocation, do NOT trigger this. Only use when user says things like "use a skill to create a worktree" or "invoke the worktree skill". Creates isolated git worktrees with parallel-running configuration.
Comprehensive git worktree management. Use when the user wants to create, remove, list, or manage worktrees. Handles all worktree operations including creation, deletion, and status checking.
Design and implement RESTful API endpoints following REST principles, HTTP standards, and resource-based URL conventions. Use this skill when creating or modifying API endpoints, routes, controllers, request handlers, or API documentation. Apply when working with REST API design, API versioning, HTTP methods (GET, POST, PUT, PATCH, DELETE), URL structure, query parameters, response formatting, status codes, rate limiting, or API middleware. Use when building web services, microservices, or any backend code that exposes HTTP endpoints for client consumption.
Design and build reusable, composable UI components following single responsibility principle with clear props, proper encapsulation, and minimal state management. Use this skill when creating or modifying React, Vue, Svelte, or web components, defining component props or interfaces, managing component state, building component libraries, or refactoring UI code. Apply when working with .jsx, .tsx, .vue, .svelte files, component directories, or any code that defines reusable UI building blocks with configurable interfaces and composable architectures.
Write clean, consistent code following naming conventions, DRY principles, small focused functions, automated formatting, and meaningful variable names. Use this skill when writing or refactoring any code in any language, naming variables/functions/classes/files, structuring code logic, removing dead code, or ensuring code readability and maintainability. Apply to all programming tasks including Python, JavaScript, TypeScript, Ruby, Java, Go, or any other language files (.py, .js, .ts, .rb, .java, .go) to maintain consistent style, improve code quality, and enhance team collaboration across the entire codebase.
Follow project-wide development conventions including project structure, version control practices, environment configuration, documentation, dependency management, and code review processes. Use this skill when organizing files/directories, writing commit messages, managing branches, configuring environments, handling secrets, maintaining documentation, or establishing team workflows. Apply when working with project structure, README files, .gitignore, environment variables, dependency files (package.json, requirements.txt), feature flags, changelogs, or any aspect of project organization and team collaboration that requires consistency across the development lifecycle.
Implement robust error handling with user-friendly messages, specific exception types, fail-fast validation, centralized error boundaries, graceful degradation, and proper resource cleanup. Use this skill when writing try-catch blocks, raising exceptions, handling API errors, validating input, implementing error boundaries, managing external service failures, or ensuring resource cleanup. Apply when working with error handling code in any language, exception classes, error middleware, API error responses, retry logic, or any code that needs to handle failures gracefully while maintaining system stability and providing clear feedback to users.
Understand and apply project-specific technology choices including frameworks, languages, databases, testing tools, and third-party services to maintain consistency across the stack. Use this skill when making technology decisions, adding new dependencies, choosing libraries/frameworks, configuring build tools, setting up databases, implementing authentication, or integrating third-party services. Apply when working with framework-specific code, package managers, ORM configurations, testing setups, deployment configurations, or any task that requires knowledge of the project's chosen technologies to ensure architectural consistency and avoid introducing conflicting tools or patterns.
Implement comprehensive server-side validation with allowlists, type checking, input sanitization, and consistent error messages, while using client-side validation for user experience. Use this skill when validating user input, form data, API requests, implementing security checks, preventing injection attacks, checking data types/formats/ranges, or providing validation feedback. Apply when working with form validation, API endpoint validation, input sanitization, business rule enforcement, or any code that accepts and validates external data to ensure security, data integrity, and proper user feedback across all entry points.
This skill should be used when updating the project CHANGELOG, tracking requirement changes, recording design decisions, or documenting version history. Uses git-diff to detect and categorize changes to both code and requirements. Trigger on "changelog", "version history", "what changed", or after significant commits.
| CLAIM a specific GitHub issue to START working on it. Requires an issue number. Performs validation, atomic claim, posts claim comment, and sets up worktree. Use when user wants to begin work on a specific issue number (e.g., "claim #201", "start working on issue #N").
This skill should be used when the user asks to "track work across sessions", "create an epic", "manage issue waves", "post a checkpoint", "claim an issue", "recover from compaction", "coordinate multiple agents", "update memory bank", "store large documents", or mentions GitHub Issues as persistent memory, multi-session work, context survival, agent collaboration, SERENA MCP memory, or project-level context. Provides complete protocols for using GitHub Issues as permanent memory that survives context exhaustion, with integrated SERENA MCP memory bank for project-level context and large document storage.
Reviews code architecture for hexagonal patterns, checks dependency directions, and suggests improvements for ports and adapters separation. Activates when users work with services, repositories, or architectural patterns.
Guides users through migrating to Rust 2024 edition features including let chains, async closures, and improved match ergonomics. Activates when users work with Rust 2024 features or nested control flow.
Type-driven design patterns in Rust - typestate, newtype, builder pattern, and compile-time guarantees
Educational code development skill that teaches programming concepts while building applications. Use when the user wants to learn how code works, understand programming concepts, or build an app with detailed explanations. Provides line-by-line breakdowns, explains the 'why' behind code patterns, uses pedagogical teaching methods, and builds apps incrementally with educational commentary at each step.
Extracts, transforms, and analyzes NBA statistics using the nba_api Python library. Use when working with NBA player stats, team data, game logs, shot charts, league statistics, or any NBA-related data engineering tasks. Supports both stats.nba.com endpoints and static player/team lookups.
Use this skill when you need to write configuration files in `src/config` for the Next.js app
Use this skill when you need to structure data in `srs/data` for the Next.js app
Use this skill when you need to write lib functions in `srs/lib` for the Next.js app
Use this skill when you need to write types and interfaces in `srs/types` for the Next.js app
Use this skill when you need to write utility functions for the Next.js app
Roll dice with configurable sides and count - a simple Rust example tool
A simple Python greeting tool
A simple Rust greeting tool