Agent Skills

by obra

Use when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions

test-driven-development

by obra

Use when implementing any feature or bugfix, before writing implementation code

dispatching-parallel-agents

by obra

Use when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies

writing-skills

by obra

Use when creating new skills, editing existing skills, or verifying skills work before deployment

writing-plans

by obra

Use when you have a spec or requirements for a multi-step task, before touching code

receiving-code-review

by obra

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

using-git-worktrees

🔥🔥🔥🔥✓ VerifiedFreeNeeds API keys

by obra

Use when starting feature work that needs isolation from current workspace or before executing implementation plans - ensures an isolated workspace exists via native tools or git worktree fallback

requesting-code-review

by obra

Use when completing tasks, implementing major features, or before merging to verify work meets requirements

subagent-driven-development

by obra

Use when executing implementation plans with independent tasks in the current session

systematic-debugging

🔥🔥🔥🔥🔥✓ VerifiedFreeQuick setup

by obra

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

finishing-a-development-branch

by obra

Use when implementation is complete, all tests pass, and you need to decide how to integrate the work - guides completion of development work by presenting structured options for merge, PR, or cleanup

executing-plans

by obra

Use when you have a written implementation plan to execute in a separate session with review checkpoints

verification-before-completion

🔥🔥🔥🔥✓ VerifiedFreeAdvanced setup

by obra

Use when about to claim work is complete, fixed, or passing, before committing or creating PRs - requires running verification commands and confirming output before making any success claims; evidence before assertions always

brainstorming

★ 245,800

by obra

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

🔥🔥🔥🔥🔥✓ VerifiedAccount requiredAdvanced setup

claude-api

✓★ 158,100

by anthropic

Claude API integration for building LLM-powered applications across Python, TypeScript, Java, Go, Ruby, C#, and PHP. Defaults to Claude Opus 4.6 with adaptive thinking and streaming; supports tool use, structured outputs, batches, and file uploads through a single /v1/messages endpoint Language detection automatically routes you to the correct SDK documentation; includes decision trees for choosing between single API calls, workflows with tool use, and agentic loops Tool runner (beta in most...

doc-coauthoring

✓★ 158,100

by anthropic

Structured workflow for collaboratively authoring documentation, proposals, specs, and similar content. Guides users through three stages: Context Gathering (closing knowledge gaps), Refinement & Structure (building sections iteratively), and Reader Testing (validating the doc works for fresh readers) Supports integration with shared documents, team channels, and templates to pull in context directly when connectors are available Uses brainstorming and curation cycles for each section, with...

web-artifacts-builder

✓★ 158,100

by anthropic

Multi-component React artifacts for Claude with bundling, state management, and shadcn/ui component library. Scaffolds React 18 + TypeScript projects with Vite, Tailwind CSS, and 40+ pre-installed shadcn/ui components via automated initialization script Bundles complete artifacts into single self-contained HTML files with inlined assets, ready for Claude artifact display Includes design guidance to avoid common "AI slop" patterns like excessive centering, purple gradients, and uniform...

Brand Guidelines

by Anthropic

Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply. license: Complete terms in LICENSE.txt

Frontend Design

by Anthropic

Generates distinctive, production-grade frontend interfaces that avoid generic AI aesthetics.

Slack Gif Creator

by Anthropic

Toolkit for creating animated GIFs optimized for Slack, with validators for size constraints and composable animation primitives. This skill applies when users request animated GIFs or emoji animations for Slack from descriptions like "make me a GIF for Slack of X doing Y". license: Complete terms in LICENSE.txt

Theme Factory

by Anthropic

Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fonts that you can apply to any artifact that has been creating, or can generate a new theme on-the-fly. license: Complete terms in LICENSE.txt

Algorithmic Art

by Anthropic

Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request creating art using code, generative art, algorithmic art, flow fields, or particle systems. Create original algorithmic art rather than copying existing artists' work to avoid copyright violations. license: Complete terms in LICENSE.txt

Canvas Design

by Anthropic

Create beautiful visual art in .png and .pdf documents using design philosophy. You should use this skill when the user asks to create a poster, piece of art, design, or other static piece. Create original visual designs, never copying existing artists' work to avoid copyright violations. license: Complete terms in LICENSE.txt

Docx

🔥🔥🔥🔥🔥✓ VerifiedFreeQuick setup

by Anthropic

Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks" license: Proprietary. LICENSE.txt has complete terms

Internal Comms

by Anthropic

A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. Claude should use this skill whenever asked to write some sort of internal communications (status reports, leadership updates, 3P updates, company newsletters, FAQs, incident reports, project updates, etc.). license: Complete terms in LICENSE.txt

MCP Builder

🔥🔥🔥🔥🔥✓ VerifiedFreeAdvanced setup

by Anthropic

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK). license: Complete terms in LICENSE.txt

Artifacts Builder

by Anthropic

Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts. license: Complete terms in LICENSE.txt

PDF

🔥🔥🔥🔥🔥✓ VerifiedFreeNeeds API keys

by Anthropic

Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Claude needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale. license: Proprietary. LICENSE.txt has complete terms

Webapp Testing

by Anthropic

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs. license: Complete terms in LICENSE.txt

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