Public GitHub footprint of Anthropic

Public repository for Agent Skills

Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you code faster by executing routine tasks, explaining complex code, and handling git workflows - all through natural language commands.

A collection of notebooks/recipes showcasing some fun and effective ways of using Claude.

Anthropic's Interactive Prompt Engineering Tutorial

Official, Anthropic-managed directory of high quality Claude Code Plugins.

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Open source repository of plugins primarily intended for knowledge workers to use in Claude Cowork

Anthropic's educational courses

A collection of projects designed to help developers quickly get started with building deployable applications using the Claude API

A suite of plugins for legal workflows

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Skills for threat modeling, scanning, triage, patching, plus an autonomous scanning harness you can /customize

An AI-powered security review GitHub Action using Claude to analyze code changes for security vulnerabilities.

A lightweight sandboxing tool for enforcing filesystem and network restrictions on arbitrary processes at the OS level, without requiring a container.

Anthropic's original performance take-home, now open for you to try!

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Community plugin marketplace for Claude Cowork and Claude Code. Read-only mirror — submit plugins at clau.de/plugin-directory-submission.

Claude Opus 4.6 wrote a dependency-free C compiler in Rust, with backends targeting x86 (64- and 32-bit), ARM, and RISC-V, capable of compiling a booting Linux kernel.

Claude Code SDK Demos

Reference blueprint for building shopping and merchant agents with Claude. Examples in retail, commerce, telecom, and entertainment included.

Reference and an example for the Bluetooth API for makers in Claude Cowork & Claude Code Desktop

Access to Anthropic's safety-first language model APIs in TypeScript

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Companion code for the global workspace interpretability paper

Human preference data for "Training a Helpful and Harmless Assistant with Reinforcement Learning from Human Feedback"

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Access to Anthropic's safety-first language model APIs via Go

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Claude Code skills that take a founder from idea to a live Claude Managed Agent: interview, scope a v0, launch in their own account, grade it, iterate, and schedule it

This repo is a mirror of the contents of base-action in https://github.com/anthropics/claude-code-action.

Rust implementation of protobuf with editions support, JSON serialization, and zero-copy views

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HTML effectiveness examples

The CLI for the Claude API

Repo for the Claude Code Marketplace to use with the Claude for Life Sciences Launch. This will continue to host the marketplace.json long-term, but not the actual MCP servers.

Skills and eval rubrics for K-12 teachers, co-developed with Learning Commons

Report issues related to MCP integration with Claude here.

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Prompts, templates, and scripts for running large-scale language migrations with Claude Code

Access to Anthropic's safety-first language model APIs in C#

Anthropic Dev Container Features, including Claude Code CLI

Claude support for Apple Foundation Models

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Lightweight demo using the Anthropic Python SDK to experiment with Claude's Search and Retrieval capabilities over a variety of knowledge bases (Elasticsearch, vector databases, web search, and Wikipedia).

Access to Anthropic's safety-first language model APIs in PHP

Contains random samples referenced in the paper "Sleeper Agents: Training Robustly Deceptive LLMs that Persist Through Safety Training".

Starter kit for a Claude-assisted on-call: mines your incident history into triage playbooks, sets up through human-approved gates, and runs read-only in your Slack channel — humans deploy every fix.

This repo contains detailed implementation information about Anthropic's paired prompts approach for evaluating political neutrality.

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The foundational document describing Claude's values and behavior

GitHub's official MCP Server

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https://transformer-circuits.pub/2025/attribution-graphs/methods.html

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Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy

A Nix plugin that resolves Cargo workspaces natively and allows for crate level builds

Display and customize Markdown text in SwiftUI

Benchmark for evaluating LLM agents on smart-contract vulnerability discovery and exploitation

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"rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Azure Blob, Azure Files, Yandex Files

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Homebrew formulae for Anthropic tools.

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A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...

Development repository for the Triton language and compiler

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Maestro: Netflix’s Workflow Orchestrator

Supplementary materials for Claude Model Cards

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A minimal HTTP client. ⚙️

Chrome extension showing helpful troubleshooting when Tailscale .local domains fail to resolve

Hypercorn is an ASGI and WSGI Server based on Hyper libraries and inspired by Gunicorn.

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Declarative Continuous Deployment for Kubernetes

Apache Beam is a unified programming model for Batch and Streaming data processing.

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Terragrunt is a flexible orchestration tool that allows Infrastructure as Code written in OpenTofu/Terraform to scale.

Serialization library for Exceptions and Tracebacks.

Type annotations and dynamic checking for a tensor's shape, dtype, names, etc.

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Like Python's faulthandler module, but also prints the C call stack

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Parallel nix evaluator with a streamable json output [maintainers @Mic92, @adisbladis]

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Rayon: A data parallelism library for Rust

Fork of google/xls — main tracks upstream; Anthropic changes live on anthropic-* branches

Chartistry is an extensible charting library for Leptos

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Sample customer-side gateway for Claude Tag identity federation. Sample code; not maintained.