HarnessKit – Manage skills/MCP/hooks/plugins/memory across all your Agents (github.com)

HarnessKit has launched as a free, open-source application designed to streamline the management of various AI coding agents from a single interface. With support for eight agents, including Claude Code, Codex, and Copilot, it consolidates their extensions—Skills, MCP Servers, Plugins, Hooks, and Agent-first CLIs—into one platform, enhancing organization and accessibility. This tool addresses a common pain point for developers, who often juggle multiple configurations scattered across diverse formats. HarnessKit allows users to filter, search, and manage all their agents’ extensions with ease, promoting efficient workflow. The significance of HarnessKit lies in its comprehensive capability to audit and manage configurations, memory, and permissions, ensuring security through a built-in trust scoring system. The app supports real-time updates and offers a straightforward deployment process, allowing users to apply changes across agents with a click. Additionally, the command-line interface and web version make it versatile for various environments, including server setups. By facilitating cross-agent extension management and enhancing security transparency, HarnessKit aims to empower developers in the rapidly evolving AI landscape, promoting better collaboration and innovation across AI/ML projects.