Agent Harness AI Tools

Sandbase HarnessOpen Source

Local-first, self-hosted AI agent runtime and MCP bridge with sandboxed sessions, memory, credentials, audit/replay, and a local Console.

ThClawsOpen Source

Open-source AI agent harness in native Rust — GUI, CLI, headless, and webapp from one binary. Multi-provider, MCP, skills, plugins, agent teams.

YaoOpen Source

✨ All your agents and workspaces in one place, on every device you own. Track tasks on a board, accessible from desktop, mobile, browser, or API. Self-hosted.

AnythingmcpOpen Source

Enterprise Agent Harness & MCP Gateway: connect APIs, databases, file servers and 600+ connectors (SAP, Odoo, Etsy…) to Claude, ChatGPT, Microsoft Copilot and your agents. Memory, skills, knowledge graph, SSO/RBAC, audit log and governance built in. Your AI company brain.

Gentle ShellOpen Source

Gentle Shell is a Pi-native workspace for AI-assisted development, bringing parallel coding agents, live tasks, Git diffs, persistent memory, and permission controls into one terminal interface. Powered by Gentle AI and Organic Driven Development (ODD).

OpenrigOpen Source

Build your own network of agents from Claude Code, Codex and Pi: persistent teams with roles, shared context and owned work.

BossConsoleOpen Source

Open-source, multi-platform harness for AI agents - a native, multi-threaded operator's console (JVM, not Electron) to run Claude Code, Codex, Gemini or OpenCode with a real browser, terminal, editor, secrets & 200+ MCP tools. Built for enterprises, science & research.

HolaOSOpen Source

Open-source agentic workspace enterprises can make their own. Connect the systems you already run — 100+ integrations, MCP, chat tools, apps, browser, local files — with shared memory. Any agent (Claude Code, Codex), any model, or BYOK. Set up in clicks, not months. Local-first: your data never leaves your machines.

Best Of Agent HarnessesOpen Source

🏆 Ranked list of 187 AI agent harnesses, plus templates, playbooks, MCP, and learning resources. Rescored weekly.