$ find your agent harness

A curated, verified, cross-vendor directory of AI agent harnesses — the runtime scaffolding that turns a model into an agent.

◆ 74 harnesses profiled · 9-axis capability schema · last verified 2026-07-08

2 of 74 harnesses · sorted by stars

Kilo Code · Kilo (Kilo-Org)

★ 25,785 · high

The Cline/Roo merger-fork turned all-in-one agentic platform (~26k stars, 3M+ users): IDE extension, CLI, and hosted KiloClaw background agent reachable via Telegram/Discord/Slack, with 500+ models, mid-task model switching, an MCP marketplace, subagents (GA April 2026), and optional Kilo Pass credits from $19/mo.

OSS coding harnessesopen-sourcefreemium✓ mcp✓ local models⛨ optional

Sweep (issue-to-PR agent) · Sweep AI

★ 7,700 · medium

An early (2023-era) open-source background agent that turned labeled GitHub issues into pull requests by planning, coding and opening a PR asynchronously; the original bot is effectively sunset — the repo README redirects to the company's pivot into a proprietary JetBrains AI plugin (autocomplete + in-IDE agent, $10-60/mo) using Sweep's own LLMs, so the background-agent product itself is legacy.

Cloud / backgroundopen-sourcefreemium⛨ cloud-remote