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. 79 600 files from 1 763 authors, of which 61 947 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.
中文论文精读、工程拆解、多论文比较、按图表讲解与证据审计。Use when the user provides a paper anchor（PDF、链接、标题、摘要/全文、图表或论文列表）并要求深读、复现分析、比较或证据核对。不用于纯翻译、单术语定义、仅 BibTeX、只找或下载论文。
Transform data into compelling narratives using visualization, context, and persuasive structure. Use when presenting analytics to stakeholders, creating data reports, or building executive presentations.
Code review assistance with linting, style checking, and best practices
Calendar and scheduling management. Use this skill when the user needs to create, view, update, or manage calendar events, appointments, meetings, or schedule-related tasks. Supports ICS file format, recurring events, and timezone handling.
This skill provides an advanced financial modeling suite with DCF analysis, sensitivity testing, Monte Carlo simulations, and scenario planning for investment decisions
\"Master Bash Automated Testing System (Bats) for comprehensive shell script testing. Use when writing tests for shell scripts, CI/CD pipelines, or requiring test-driven development of shell utilities.\
\"This skill calculates key financial ratios and metrics from financial statement data for investment analysis\
\"This skill applies consistent corporate branding and styling to all generated documents including colors, fonts, layouts, and messaging\
Use when you need to control Discord from Clawdbot via the discord tool: send messages, react, post or upload stickers, upload emojis, run polls, manage threads/pins/search, create/edit/delete channels and categories, fetch permissions or member/role/channel info, or handle moderation actions in Discord DMs or channels. Also use for offline moderation of messages.
Master systematic debugging techniques, profiling tools, and root cause analysis to efficiently track down bugs across any codebase or technology stack. Use when investigating bugs, performance issues, or unexpected behavior.
Execute database migrations across ORMs and platforms with zero-downtime strategies, data transformation, and rollback procedures. Use when migrating databases, changing schemas, performing data transformations, or implementing zero-downtime deployment strategies.
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.
Manage emails via REST API - send, read, search, delete emails, manage contacts, upload files, and store data. Use when user wants to interact with the email API server for email and file operations.
Master advanced Git workflows including rebasing, cherry-picking, bisect, worktrees, and reflog to maintain clean history and recover from any situation. Use when managing complex Git histories, collaborating on feature branches, troubleshooting repository issues, or when initializing a new repository according to our companies specific guidelines.
Generate clinical trial protocols for medical devices or drugs. This skill should be used when users say \"Create a clinical trial protocol\", \"Generate protocol for [device/drug]\", \"Help me design a clinical study\", \"Research similar trials for [intervention]\", or when developing FDA submission documentation for investigational products.
Publish and manage research papers on Hugging Face Hub. Supports creating paper pages, linking papers to models/datasets, claiming authorship, and generating professional markdown-based research articles.
FHIR API development guide for building healthcare endpoints. Use when: (1) Creating FHIR REST endpoints (Patient, Observation, Encounter, Condition, MedicationRequest), (2) Validating FHIR resources and returning proper HTTP status codes and error responses, (3) Implementing SMART on FHIR authorization and OAuth scopes, (4) Working with Bundles, transactions, batch operations, or search pagination. Covers FHIR R4 resource structures, required fields, value sets (status codes, gender, intent), coding systems (LOINC, SNOMED, RxNorm, ICD-10), and OperationOutcome error handling.
Manage Google Calendar - search, create, update events and answer calendar questions. Use when user wants to interact with their Google Calendar for scheduling and calendar operations.
This skill should be used when users want to train or fine-tune language models using TRL (Transformer Reinforcement Learning) on Hugging Face Jobs infrastructure. Covers SFT, DPO, GRPO and reward modeling training methods, plus GGUF conversion for local deployment. Includes guidance on the TRL Jobs package, UV scripts with PEP 723 format, dataset preparation and validation, hardware selection, cost estimation, Trackio monitoring, Hub authentication, and model persistence. Should be invoked for tasks involving cloud GPU training, GGUF conversion, or when users mention training on Hugging Face Jobs without local GPU setup.
Automate payer review of prior authorization (PA) requests. This skill should be used when users say \"Review this PA request\", \"Process prior authorization for [procedure]\", \"Assess medical necessity\", \"Generate PA decision\", or when processing clinical documentation for coverage policy validation and authorization decisions.
Add and manage evaluation results in Hugging Face model cards. Supports extracting eval tables from README content, importing scores from Artificial Analysis API, and running custom model evaluations with vLLM/lighteval. Works with the model-index metadata format.
Create and manage datasets on Hugging Face Hub. Supports initializing repos, defining configs/system prompts, and streaming row updates. Designed to work alongside HF MCP server for comprehensive dataset workflows.
This skill MUST be invoked when users want to create, build, or develop MCP (Model Context Protocol) servers. Should be used for any task involving MCP server creation, whether simple calculator tools or complex API integrations. Covers FastMCP (Python) and MCP SDK (Node/TypeScript) implementations, tool design patterns, error handling, security best practices, and testing. Invoke this skill whenever the user mentions 'MCP server', 'MCP tool', 'FastMCP', or asks to create tools for LLM interaction.
Implement comprehensive evaluation strategies for LLM applications using automated metrics, human feedback, and benchmarking. Use when testing LLM performance, measuring AI application quality, or establishing evaluation frameworks.
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.).
Integrate PayPal payment processing with support for express checkout, subscriptions, and refund management. Use when implementing PayPal payments, processing online transactions, or building e-commerce checkout flows.
Master advanced prompt engineering techniques to maximize LLM performance, reliability, and controllability in production. Use when optimizing prompts, improving LLM outputs, or designing production prompt templates.
Make sure to ALWAYS use this skill when working with python code! Help designing, structuring, and maintaining Python projects, including virtualenvs, packaging, SQLite (sql3) usage, documentation of bug fixes, and clear commenting practices.
Build Retrieval-Augmented Generation (RAG) systems for LLM applications with vector databases and semantic search. Use when implementing knowledge-grounded AI, building document Q&A systems, or integrating LLMs with external knowledge bases.
Calculate portfolio risk metrics including VaR, CVaR, Sharpe, Sortino, and drawdown analysis. Use when measuring portfolio risk, implementing risk limits, or building risk monitoring systems.
This skill provides mandatory safety guidelines for coding agents. It should be used at the start of any coding session and whenever performing file operations, executing code, handling credentials, or interacting with external systems. The protocol defines what actions are permitted, restricted, or prohibited to ensure secure, reliable, and ethical agent behavior.
Perform a focused SEO audit on JavaScript concept pages to maximize search visibility, featured snippet optimization, and ranking potential
Master ShellCheck static analysis configuration and usage for shell script quality. Use when setting up linting infrastructure, fixing code issues, or ensuring script portability.
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\".
Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Gemini CLI's capabilities with specialized knowledge, workflows, or tool integrations.
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.
Implement Stripe payment processing for robust, PCI-compliant payment flows including checkout, subscriptions, and webhooks. Use when integrating Stripe payments, building subscription systems, or implementing secure checkout flows.
Get system information using executable scripts
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.
Replace with description of the skill and when Claude should use it.
Writing unit and integration tests for the tldraw SDK. Use when creating new tests, adding test coverage, or fixing failing tests in packages/editor or packages/tldraw. Covers Vitest patterns, TestEditor usage, and test file organization.
Use this skill when a user needs to inspect, score, repair, or regression-test academic paper formatting in DOCX files, especially thesis, journal, or conference documents with a separate format specification. The skill guides Codex through local-first document handling, rule extraction, formatting repair, report review, and contribution-safe validation.
Xcode 26 and Apple platform update notes with a focus on Liquid Glass, Foundation Models Framework, and Apple Intelligence. Use when asked to explain, summarize, compare, or implement Xcode 26 era framework changes across SwiftUI, UIKit, AppKit, Foundation, App Intents, StoreKit, MapKit, WidgetKit, visionOS, or Swift language features.
Audit the fable roadmap (docs/fable_roadmap/) — verify claimed progress with proof, write a short report, update RESUME state + BACKLOG rank. Use at wave close or whenever the user asks how roadmap development is going. Triggers on - 'fable audit', 'roadmap audit', 'how is the roadmap going', 'audit progress', or /fable-audit.
Run diagnostic scripts on tasks, specs, boards, or reflections. Wraps testing_tools/ with proper working directory and output mode selection. Use this skill whenever the user wants to inspect, debug, or check the state of a task, spec, board, or reflection — even if they don't say 'inspect' explicitly. Triggers on: 'why did task X fail', 'show me spec Y', 'what's on the board', 'check task', 'inspect', 'diagnose', or /hk-local-diagnose.
Compound a learning into a reusable pattern. Use after solving a non-trivial problem, discovering a principle worth reusing, or hitting a gotcha that would bite someone else. Triggers on: 'document this', 'capture this learning', 'that was tricky', 'let's compound this', 'compound this', or /hk-compound.
Audit whether an AI agent can autonomously close the loop on problems in a given area — from discovering a symptom to verifying a fix — without human intervention. Evaluates documentation, diagnostic tools, commands, logs, and flows for completeness and actionability. Generates a gap-focused report with ratings. Use this skill whenever someone wants to assess debugging readiness, check if docs are agent-sufficient, audit a workflow for autonomous solvability, evaluate operational tooling coverage, or wants to know 'could an agent fix this on its own?' Triggers on: 'loop audit', 'audit this flow', 'is this debuggable', 'agent readiness', 'can an agent solve this', 'autonomous debugging check', or /hk-autonomy-audit.
Generate changelog entries from git diffs, prepend to CHANGELOG.md, and optionally commit + PR. Use when the user wants to update the changelog.
Consults existing breadcrumb analysis docs before exploring the codebase. Use this skill whenever the user asks about how a flow works, where something happens in the code, how to debug or test a specific area, what files are involved in a feature, or needs to understand the path data takes through the system. Also trigger when the user mentions 'where does X happen', 'how does Y work', 'trace this', 'what files handle Z', 'how to test this flow', 'debug this area', or when you're about to spawn multiple exploration subagents to understand a cross-cutting flow. Even if the user doesn't explicitly ask — if the task requires understanding how multiple layers connect (frontend → backend → worker → CLI), check breadcrumbs first. This is cheaper and more accurate than re-discovering the same information through code search.
Traces a workflow end-to-end through the harness-kit monorepo and creates a breadcrumb analysis doc in docs/breadcrumb_analysis/. Use this skill whenever the user wants to document a flow, trace a workflow, understand how a feature works across layers (frontend → backend → worker → CLI), or create debugging guides for a specific flow. Also use when the user mentions 'breadcrumb', 'trace this flow', 'how does X work end to end', 'document this workflow', or /hk-breadcrumb-creator.
Run comprehensive agent-native architecture review with scored principles. Audits a codebase against 8 agent-native architecture principles (Action Parity, Tools as Primitives, Context Injection, Shared Workspace, CRUD Completeness, UI Integration, Capability Discovery, Prompt-Native Features) by launching parallel sub-agents and producing a scored report. Use when the user wants to evaluate how agent-friendly their architecture is, or audit specific principles. Triggers on: 'agent native audit', 'architecture review', 'how agent-friendly is this', or /hk-arch-audit.
Inspect and debug errors via logs across the harness-kit monorepo. Reads the right log file based on the error layer — backend, frontend, celery, odin CLI, or odin task execution. Use this skill whenever someone mentions a 500 error, a stack trace, a crash, 'check the logs', 'what went wrong', a service not starting, celery task failures, or any runtime error. Also triggers on: 'getting 500', 'backend error', 'celery error', 'odin failed', 'check logs', 'tail logs', 'debug this error', or /hk-local-logs.
Interactive Root Cause Analysis enforcer. Guides you through the 7-step RCA protocol: Reproduce, Locate, Hypothesis, Failing Test, Fix, Verify Live, Document. Use when debugging a bug, investigating a failure, or when something unexpected happened. This skill gates each step — it won't let you skip to a fix without stating a hypothesis first. Triggers on: 'something is broken', 'debug this', 'why is this failing', 'RCA', 'root cause', or /hk-rca.
Mock-first, layer-by-layer feature development. Instead of building a feature end-to-end and hoping the interface works, start by mocking at the user-facing surface with realistic data, get user acceptance on the experience, then deepen one complexity layer at a time with TDD. Everything is anchored on disk so work survives across sessions. Use whenever building a new feature, adding significant UI, planning a multi-layer change, or when the user mentions 'mock first', 'let me see it first', 'prototype this', 'simulate this feature', 'build this layer by layer', or /hk-mock-first.
> Resolve merge conflicts in the current branch. Only invoke when the user explicitly runs /hk-merge-resolve. Do NOT auto-trigger on mentions of merge conflicts, conflict markers, or similar keywords.
Plan and execute an odin spec. Handles working directory, auth, nested-session detection, and post-run diagnostics. Use whenever the user wants to run a spec, test a spec, or do a smoke test. Triggers on: 'run this spec', 'test this spec', 'odin plan', 'smoke test', or /hk-local-run-spec.
Iteratively improve any output by running a structured observe-hypothesize-change-rerun loop. Uses an organized scratch directory to prevent context blowup — the conversation stays thin while iterations accumulate on disk. Use when an output (reflection, plan, prompt, pipeline result) isn't good enough and needs systematic refinement. Triggers on: 'close the loop', 'this output isn't good enough', 'iterate on this', 'refine this output', 'improve this reflection', or /hk-refine.
Run a scout wave over outside sources (links, blogs, trending repos) into a progressive-disclosure research wiki in the current project, then distill findings into the project's ideas/backlog file. Generic across projects. Use when the user shares links/blogs to research, asks to "scout", "build a wiki from these", or wants outside ideas funneled into planning. Triggers on - 'scout wave', 'wiki scout', 'research these links', 'update the wiki', or /hk-scout-wiki.
Create and maintain a shift-handover HTML changelog artifact — a page the returning human reads in two minutes to know everything that happened while they were away. Generic across projects. Use when working autonomously for an away user, when asked for a changelog/progress page/catch-up artifact, or at every meaningful transition once one exists. Triggers on - 'changelog artifact', 'progress page', 'what happened while I was away', 'keep me posted in html', or /hk-shift-changelog.
Run a codebase hygiene audit. Scans for misplaced files, dead code, temp files, security issues, structural problems, dependency slop, and git slop. Outputs a prioritized report with P0-P4 findings. Use periodically or before releases. Triggers on: 'audit the codebase', 'find slop', 'hygiene check', 'clean up', or /hk-slop-audit.
Claude Skills — questions
Answers built from the skills we actually parsed.