Open source agent-harness projects
Every project in the registry tagged agent-harness, ranked by real GitHub adoption.
RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities to create a superior context la
Manage, build, and run AI agent teams around the clock
Chat with your documents using any LLM, fully private
Your Personal AI Assistant; easy to install, deploy on your own machine or on the cloud; supports multiple chat apps with easily extensible capabilities.
A local multi-agent harness that works with your existing Claude Code, Codex subscriptions, allows you to run an office of agents
Orkas is an open-source, local-first AI desktop app: a commander LLM directs specialist sub-agents, and runs your installed coding CLIs — Claude Code, Codex, Op
Long-horizon agent control plane for durable, governed work across Codex, Claude Code, and other harnesses.
Knowhere extracts, parses, and outputs structured chunks ready for AI Agents and RAG.
Monitor, debug, and scale LLM applications with ease
Runs coding agents as a graph: one agent implements, independent agents review, failures go to repair, and nothing ships until the checks pass. Works with Codex
For EHRs, payer portals, and any app your team clicks through. A person or an agent shows the task; OpenAdapt turns it into a local program that repeats the ste
Turn Pi into el Gentleman: a senior-architect development harness with SDD/OpenSpec, subagents, strict TDD evidence, review guardrails, and skill discovery.
Full-stack AI agent for coding, files, terminals, tools, research, content, multimodal work, and multi-agent workflows.
Follow your curiosity. Build across disciplines. Open-source software and hardware for polymaths in the making.
The multi-agent harness that checks the work: verifies agent runs by artifacts (stop-hook gates, independent judges, append-only event logs) across Claude Code,
Multiplayer harness that shapes around your work. Agents, apps and workflows your team shares, used from Slack, Telegram, WhatsApp, Teams, Email, Web or your ow
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Frequently asked questions
How many open source agent-harness projects are there?
This registry tracks 16 projects tagged agent-harness, with 322,880 GitHub stars between them. The most-adopted is ragflow at 93,365 stars.
Are these agent-harness projects free to use?
Yes — 15 of the 16 carry an explicit open-source licence across 4 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which agent-harness project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these agent-harness projects still maintained?
16 of the 16 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.