Find the best CLAUDE.md, AGENTS.md and Claude skills

AnthropicSkill

frontend-design

anthropics/skills/skills/frontend-design/SKILL.md

Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defaults.

Often used withinstantly-campaign·ecosystem-reference·brief-to-tasks

AnthropicSkill

internal-comms

anthropics/skills/skills/internal-comms/SKILL.md

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.).

Often used withskill-share·slack-gif-creator·raffle-winner-picker

AnthropicSkill

mcp-builder

anthropics/skills/skills/mcp-builder/SKILL.md

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).

Often used withchinese-code-review·codebase-migrate·Problem-Solving Techniques

AnthropicSkill

pdf

anthropics/skills/skills/pdf/SKILL.md

Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and OCR on scanned PDFs to make them searchable. If the user mentions a .pdf file or asks to produce one, use this skill.

Often used withgift-evaluator·Video Generation·stock_analysis

AnthropicSkill

pptx

anthropics/skills/skills/pptx/SKILL.md

Use this skill any time a .pptx or .potx file is involved in any way — as input, output, or both. This includes: creating slide decks, pitch decks, or presentations; reading, parsing, or extracting text from any .pptx or .potx file (even if the extracted content will be used elsewhere, like in an email or summary); editing, modifying, or updating existing presentations; combining or splitting slide files; working with templates (.potx), layouts, speaker notes, or comments. Trigger whenever the user mentions \"deck,\" \"slides,\" \"presentation,\" or references a .pptx or .potx filename, regardless of what they plan to do with the content afterward. If a .pptx or .potx file needs to be opened, created, or touched, use this skill.

Often used withfile-reading·context7-efficient·import-memory

AnthropicSkill

skill-creator

anthropics/skills/skills/skill-creator/SKILL.md

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

Often used withtaskflow-inbox-triage·mermaid-diagram-generator·ecosystem-reference

AnthropicSkill

slack-gif-creator

anthropics/skills/skills/slack-gif-creator/SKILL.md

Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts. Use when users request animated GIFs for Slack like "make me a GIF of X doing Y for Slack.

Often used withskill-share·raffle-winner-picker·meeting-insights-analyzer

AnthropicSkill

theme-factory

anthropics/skills/skills/theme-factory/SKILL.md

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.

Often used withskill-share·context7-efficient·artifacts-builder

AnthropicSkill

webapp-testing

anthropics/skills/skills/webapp-testing/SKILL.md

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.

Often used withskill-share·intelligent-routing·artifacts-builder

AnthropicSkill

web-artifacts-builder

anthropics/skills/skills/web-artifacts-builder/SKILL.md

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.

AnthropicSkill

xlsx

anthropics/skills/skills/xlsx/SKILL.md

Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .xltx, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like \"the xlsx in my downloads\") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved.

Often used withVideo Generation·gift-evaluator·stock_analysis

AnthropicSkill

template-skill

anthropics/skills/template/SKILL.md

Replace with description of the skill and when Claude should use it.

Often used withskill-share·aesthetic·artifacts-builder

Hugging FaceAGENTS.md

transformers

huggingface/transformers/.ai/AGENTS.md

Run make style (or make fix-repo) as the last step before opening a PR. Hosted review agents read this file via the root AGENTS.md / CLAUDE.md symlinks. Local agents wire their own assets: make codex (→ .agents/), make claude (→ .claude/). If your approach is materially different, say why a second PR is needed in the issue. - No one-off PRs for tiny edits (a single typo, an isolated lint fix). Mechanical cleanups are fine, but not as a first…

No other project uses it yet

Hugging FaceSkill

add-or-fix-type-checking

huggingface/transformers/.ai/skills/add-or-fix-type-checking/SKILL.md

Fixes broken typing checks detected by ty, make typing, or make check-repo. Use when typing errors appear in local runs, CI, or PR logs.

No other project uses it yet

Hugging FaceCopilot instructions

transformers

huggingface/transformers/.github/copilot-instructions.md

This copilot-instructions.md file provides guidance for code agents working with this codebase. Many models in the codebase have similar code, but it is not shared by inheritance because we want each model file to be self-contained. We use two mechanisms to keep this code in sync: - "Copied from" syntax. Functions or entire classes can have a comment at the top like this: # Copied from transformers.models.llama.modeling_llama.rotate_half or # Copied from transformers.models.t5.modeling_t5.T5LayerNorm with T5->MT5 These comments are actively checked by…

AnthropicCLAUDE.md

claude-code

anthropics/claude-code/CLAUDE.md

Guidance for Claude Code and other coding agents working in this repository. Workflow jobs in this repository that call Claude run with three protections. Keep them when you add or…

LangChainReads credentialsAGENTS.md

langchain

langchain-ai/langchain/AGENTS.md

This document provides context to understand the LangChain Python project and assist with development. When Corridor's analyzePlan tool is available, create a plan and use the tool to analyze it before generating or modifying code. Apply the resulting security guidance before writing code. This is a Python monorepo with multiple independently versioned packages that use uv. This monorepo uses uv for dependency management. Local development uses editable installs declared under each package's [tool.uv.sources] table in pyproject.toml, so path dependencies resolve…

No other project uses it yet

GitHubAGENTS.md

spec-kit

github/spec-kit/AGENTS.md

GitHub Spec Kit is a comprehensive toolkit for implementing Spec-Driven Development (SDD) - a methodology that emphasizes creating clear specifications before implementation. The toolkit includes templates, scripts, and workflows that guide development teams through a structured approach to building software. Specify CLI is the command-line interface that bootstraps projects with the Spec Kit framework. It sets up the necessary directory structures, templates, and AI agent integrations to support the Spec-Driven Development workflow. The toolkit supports multiple AI coding assistants, allowing…

No other project uses it yet

GitHubCLAUDE.md

spec-kit / integrations

github/spec-kit/docs/integrations/claude.md

Install Claude Code before setup. The integration key is claude. This integration is declared multi-install safe. See the shared multi-install rules. For an existing Spec Kit project, use specify integration install claude. See integration management for activation, upgrades, and removal. Skills are installed as .claude/skills/speckit-<command>/SKILL.md. Invoke them in Claude's chat, for example /speckit-specify or /speckit-bug-assess for the installed bug extension. By default every Spec Kit skill installed for Claude Code is model-invocable, so its description is always in Claude's context…

No other project uses it yet

GitHubSkill

add-community-extension

github/spec-kit/.github/skills/add-community-extension/SKILL.md

Add a community extension to the Spec Kit catalog from a GitHub issue submission. USE FOR: processing extension submission issues, validating catalog entries, updating catalog.community.json and docs/community/extensions.md, creating PRs. DO NOT USE FOR: creating new extensions from scratch, or first-party extension work.