Claude Code Open Source Tools
Claude Code is a terminal-based AI coding assistant that helps developers understand codebases, make changes, run commands, and work through software tasks using natural language. It can reduce repetitive work and help navigate unfamiliar projects, while keeping development activity close to the files, tools, and workflows developers already use. Human review remains important, especially for changes that affect security, reliability, or production systems.
Open source tools in this area include extensions, agent skills, workflow automation, integrations, setup utilities, and learning resources. When choosing one, check its license, maintenance activity, compatibility with your environment, required permissions, and how it handles credentials and data. Consider whether its integrations fit your existing tools and whether its behavior is easy to inspect and control. These resources can help individual developers and teams customize coding workflows, learn agentic development, or connect coding assistance to broader engineering processes.
33 repositories · updated October 3, 2026
web-design: A Claude Code SKILL for Spec-First Web Page Design
The web-design project is a Claude Code SKILL designed to streamline the creation of beautiful and consistent web pages. It emphasizes a 'spec first, code second' approach, ensuring design principles are established before development begins. This tool helps generate UI, visuals, motion, and responsiveness that are consistent across pages and easily editable.
cc-polymath: Context-Efficient Skills for Claude Code Development
cc-polymath is an innovative GitHub repository offering a vast collection of atomic skills and workflows specifically designed for Claude Code. It addresses the challenge of providing comprehensive development knowledge without overwhelming the AI's context window. By employing a progressive discovery system, cc-polymath ensures context efficiency and high-quality skill access across a wide range of technical domains.
agent-plugins: A Marketplace for AI Coding Assistant Skills
agent-plugins is a tool-neutral marketplace offering ready-to-install bundles that enhance AI coding assistants. It provides curated skills, tool connections, and specialist roles for developers using VS Code, GitHub Copilot CLI, or Claude Code. This repository simplifies the process of integrating advanced AI capabilities into your development workflow.
opcode: A Powerful GUI Toolkit for Claude Code AI Development
opcode is a robust desktop application built with Tauri 2, designed to enhance interaction with Claude Code. It offers a comprehensive GUI for managing AI-assisted development sessions, creating custom agents, and tracking usage, bridging the gap between the command-line interface and a more intuitive visual experience.
ECC: The Agent Harness Performance Optimization System for LLMs
ECC is an advanced agent harness performance optimization system, providing a coordinated engineering system and toolbox for LLM development. It enables agents to plan, test, implement, review, and learn effectively, enhancing productivity and security for AI-driven coding workflows across platforms like Claude Code, Codex, and Cursor.
AntiVibe: Learn Code with AI-Powered Deep Dives and Architectural Audits
AntiVibe is an innovative code learning and audit framework designed to help developers truly understand code, whether it's AI-generated, new, or legacy. It transforms any codebase into educational deep dives or senior-level architectural audits, moving beyond mere code summaries to explain the 'what,' 'why,' and 'when' of code patterns. This tool addresses the common problem of developers copying AI-generated code without grasping its underlying logic or implications.
awesome-claude-code: A Curated List of Resources for Anthropic's Claude Code
The awesome-claude-code repository offers a comprehensive, curated list of tools, integrations, frameworks, and resources specifically designed for developers utilizing Anthropic's Claude Code. This valuable collection helps users discover everything from official SDKs and agent skills to IDE integrations and client GUIs. It serves as an essential guide for enhancing development workflows with AI-powered coding assistance.
Codex MCP Server: Bridge Claude Code with OpenAI Codex CLI
Codex MCP Server is an essential tool that acts as a bridge between Claude Code and OpenAI's Codex CLI. It allows developers to integrate powerful AI-driven code analysis, generation, and review capabilities directly into their editor. This server wrapper enables Claude Code to fully leverage Codex's advanced AI functionalities.
AgentBridge: Local Bridge for Claude Code and Codex Collaboration
AgentBridge is an innovative local tool designed to facilitate real-time, bidirectional collaboration between Claude Code and Codex AI agents. It enables seamless cross-review, task splitting, and quota relay, allowing these powerful models to work together efficiently within a single session without manual intervention. Notably, the tool itself was largely built by Claude Code and Codex collaborating through AgentBridge.
ios-simulator-skill: Enhance Claude's iOS App Development with Simulator Skill
The ios-simulator-skill is a production-ready skill for Claude Code, designed to build, test, and automate iOS applications efficiently. It optimizes Claude's interaction with the iOS Simulator and Xcode builds, significantly reducing token wastage from LLM output. This skill provides 27 scripts for robust semantic UI navigation, accessibility testing, and device lifecycle management.
Micstec Skills: A Comprehensive Collection for AI Coding Agents
Micstec Skills is a centralized GitHub repository offering a vast collection of skills, plugins, and extensions for various AI coding agents. It supports platforms like Claude Code, Gemini CLI, Copilot, and Cursor, providing a unified approach to managing AI agent capabilities. Developers can easily discover, install, and enhance their AI-powered development workflows across multiple environments.
ruflo: Coordinate AI Agents and Autonomous Workflows
Ruflo is a TypeScript agent harness for Claude Code and Codex. It adds coordinated agent teams, persistent memory, workflow automation, and MCP integrations for developers building multi-agent systems.