Harnesses

Ainz

A flexible, customizable, performant, secure and a little retro AI Agent Harness magic.

Amp

Amp is a frontier coding agent that lets you wield the full power of leading models.

Aster

An open-source agent harness for software work.

Atomic Agent

Atomic Agent is a local-first AI agent. Runs open-weight models on your own machine via llama.cpp.

c0

c0 is an open-source AI platform built for organizational work, tools, and context. A single deployment to Cloudflare to get started.

Claude Code

Anthropic's agentic coding tool for developers. Claude Code understands your codebase, edits files, runs commands, and helps you ship faster.

Cline

Autonomous coding agent as an SDK, IDE extension, or CLI assistant.

Cydonia

A desktop workspace for the coding agents you run. Open any directory as a project, put an ACP agent to work in it, and keep what comes out as durable artifacts on your own disk — articles, boards and tables, not a chat log.

Deep Agents

The batteries-included agent harness.

DeepSeek Harness

DeepSeek Harness: Everything is a Plugin.

Empryo

Empryo is the AI coding agent that edits symbols, not strings — it reads your repo as a living organism, sequences its genome (a ranked dependency graph), and edits through the AST and LSP.

exoharness

Exo is an agent + harness architecture that is fully recursive, able to safely edit all aspects of itself at runtime to get better at your tasks.

Exquisite Harness

Mix and match harnesses with models.

Factory Droid CLI

The Factory Terminal UI gives you slash commands, persistent sessions, and full plugin support for delegating to Droids without leaving your keyboard.

Fold

Fold is an Effect-native, provider-agnostic, isomorphic agent core with an optional opinionated coding agent, CLI, and TUI. It supports multiple model providers (including openai/anthropic-compatible and subscription-backed providers for Codex, Grok, and OpenCode Zen), subagents, and RLM-like orchestration patterns.

fx

Unix like coding agent

goose

an open source, extensible AI agent that goes beyond code suggestions - install, execute, edit, and test with any LLM

Grok Build

Grok Build Beta adds a native subagent view, Plan Mode integration, mouse support, and a fullscreen terminal UI. Install with curl -fsSL https://x.ai/cli/install.sh | bash.

Headlong

An open source agent microharness featuring persistent agency and recursive LLMs. Of bash, by bash, for bash; it's shells all the way down.

Hermes Agent

Hermes Agent — a standalone terminal app and a native application for macOS, Windows, and Linux. Install it and start a conversation with the agent that grows with you.

HumanLayer

The best way to get AI coding agents to solve hard problems in complex codebases.

Kimi Code

Try Kimi K2.7 Code in Kimi Code (KFC), the ultimate AI toolkit for developers. Featuring high-performance CLI tools and Turbo-speed models to automate code generation and boost development efficiency. Experience faster, more reliable AI-powered coding today

kimi k2.7 terminal based coding agent & harness running on your own Cloudflare account.

Kit

Kit is a coding agent runtime. Claude Code but faster, cheaper and more to the point 🎯

Loopyard

A multiplayer software factory where humans and AI ship code together

Magnitude

Magnitude gets frontier-level coding out of open models like GLM, Kimi, and DeepSeek.

Marshall

A coding team you compose. Mix local and hosted models, give each agent a name and a job. Built for open weights.

Muse Code

Muse Code takes on complex software engineering tasks across large repositories: planning changes, writing code, and validating the results.

nac

nac is an open-source agent harness for longer, ambitious tasks — experiments, training runs, infrastructure, and prototyping that has to stay aligned with the original intent.

Oh My OpenAgent

Meet Sisyphus: The batteries-included agent that codes like you. Multi-model orchestration, Team Mode, background agents, 60+ lifecycle hooks.

omp (Oh My Pi)

Subagents, plan mode, LSP, DAP, hindsight memory, hashline edits, time-traveling rules — with a native Rust engine doing the heavy lifting.

OpenAI Codex

The best way to build with agents. Codex accelerates real engineering work, from planning and building features to refactors, reviews, and releases—working seamlessly across your tools.

OpenCode

OpenCode - The open source coding agent.

Ori Harness

Run the agent CLI you already use — Claude Code, Codex, Hermes, OpenCode, Pi — on OpenRouter. ori wraps each one with OAuth sign-in (no API key), your org guardrails, and one bill.

Pi Coding Agent

A terminal-based coding agent

pi-fabric

A programmable tool and agent runtime for Pi

pool

pool is Poolside’s coding agent that runs in your terminal or integrates with any ACP-compatible editor

Portable Computer

Run Perplexity Computer locally on NVIDIA DGX Spark. Private, on-device work with cloud escalation when needed.

Prism

A local-first capability layer for small open models: context, planning, tools, and verification the frontier scaffolding, minus the frontier model.

QM

Multiplayer agent harness for work

SmallHarness

A harness for small llms

Standard Code

Standard Code is a cloud-based coding agent with unlimited usage, built and operated by Standard Agents. $5 for your first week, then $49/month per line.

A terminal interface for Nanocodex

A native LLM agent for the ESP32. The model plans, Lua acts, a button is the permission system.

Coding agent with lossless context management

vsurf

vsurf is an open-source coding and research RLM agent for general and long-running work, with first-class browser automation.

whip

A fast coding-agent harness in Go.

Zeron

Control your coding agents from any of your devices.