Harness Kit is a harness-agnostic framework for AI coding tools that consolidates your plugins, skills, MCP servers, hooks, and conventions into one portable config file. It reads existing configurations from Claude Code, Cursor, Copilot, and other tools, shows where they disagree, and reconciles them into a single harness.yaml you control.

A harness is the configuration that tells your AI how to work in a given session. Each AI coding tool has its own setup folder with different names and incompatible formats—Claude Code's ~/.claude, Cursor's .cursor, Copilot's config, and so on. Harness Kit is the app that collapses all these per-tool harnesses into one harness.yaml you carry with you.

How do I share my setup with teammates?

Run /harness-export to write a harness.yaml with your installed plugins, then commit it to your dotfiles or send it to a teammate. They run /harness-import harness.yaml and pick what they want from an interactive list. Your setup is a starting point, not something they have to replicate exactly.

Is Harness Kit safe? What does installing a plugin actually do?

Plugins are plain markdown files with no binaries, background processes, or network calls on install. Some plugins include shell scripts that only run when you invoke the skill. You can read every file before installing.

Do I need to pay for anything beyond my existing Claude subscription?

No. Harness Kit is free and open source under the Apache 2.0 license. All you need is Claude Code.

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Harness Kit

A harness-agnostic framework for AI coding tools

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Community votes: 0
DR by Ahrefs: 16 no change since last check

Ahrefs Domain Rating benchmarked 11 Nov 2026, rebuilt 11 Nov 2026.

A portable configuration system that unifies setup across Claude Code, Cursor, Copilot, and other AI coding tools into a single harness.yaml file.

What it is

Screenshot of the Harness Kit homepage — harnesskit.ai, as visitors see it

Harness Kit is a framework that consolidates configuration across multiple AI coding tools. It reads existing configs from Claude Code, Cursor, Copilot, and others, identifies conflicts, and reconciles them into a single portable harness.yaml file. The system allows users to configure plugins, skills, MCP servers, and hooks in one place, then observe how each tool uses them through Observatory and Memory features. Users can share their complete setup with teammates by distributing the single configuration file.

The product operates in three stages: Configure (declare all settings in one harness.yaml), Observe (track every session and tool call), and Share (distribute the setup file to teammates). It is free and open source under the Apache 2.0 license.

What it is built with

Configure plugins, skills, MCP servers, and hooks in a single harness.yaml file
Observatory: monitor every session, tool call, and minute of activity
Memory: persistent knowledge graph for AI orientation
Comparator: run prompts across Claude Code, Cursor, and Copilot side by side
Import existing configs from multiple AI coding tools automatically
Share complete setup via single file with teammates
Harness Parity: verify all connected AI tools end up with identical configuration
Cross-harness compatibility table showing actual tool capabilities

Pricing

Pricing model: Open source

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Harness Kit metrics

Benchmarks for harnesskit.ai: Ahrefs Domain Rating and Majestic link data, with the change since the last build.
Metric	Value
Domain Rating	16 no change since last check
Trust Flow	0 no change since last check
Citation Flow	20 no change since last check
Referring domains	11 no change since last check
External backlinks	56 no change since last check

Ahrefs Domain Rating benchmarked 11 Nov 2026, rebuilt 11 Nov 2026. Majestic benchmarked 11 Nov 2026, rebuilt 11 Nov 2026. Link data built by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

Harness Kit domain build sheet

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Public RDAP record, last read 11 Nov 2026, 03:50 UTC.
Domain age	8 months
Registered	8 Mar 2026
Expires	8 Mar 2028
Registrar	Squarespace Domains LLC
DNSSEC	Not signed

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Harness Kit after-launch build log

Since Harness Kit launched on Maker Launches on 11 November 2026, these are the figures we have tracked.

Domain Rating (Ahrefs): 16; First measured 11 Nov 2026
Trust Flow (Majestic): 0; First measured 11 Nov 2026
Referring domains (Majestic): 11; First measured 11 Nov 2026

Day 0 since launch. Next receipt: day 30, 11 Dec 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.

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Questions from the bench

What is Harness Kit?: Harness Kit is a harness-agnostic framework for AI coding tools that consolidates your plugins, skills, MCP servers, hooks, and conventions into one portable config file. It reads existing configurations from Claude Code, Cursor, Copilot, and other tools, shows where they disagree, and reconciles them into a single harness.yaml you control.
What is a harness?: A harness is the configuration that tells your AI how to work in a given session. Each AI coding tool has its own setup folder with different names and incompatible formats—Claude Code's ~/.claude, Cursor's .cursor, Copilot's config, and so on. Harness Kit is the app that collapses all these per-tool harnesses into one harness.yaml you carry with you.
How do I share my setup with teammates?: Run /harness-export to write a harness.yaml with your installed plugins, then commit it to your dotfiles or send it to a teammate. They run /harness-import harness.yaml and pick what they want from an interactive list. Your setup is a starting point, not something they have to replicate exactly.
Is Harness Kit safe? What does installing a plugin actually do?: Plugins are plain markdown files with no binaries, background processes, or network calls on install. Some plugins include shell scripts that only run when you invoke the skill. You can read every file before installing.
Do I need to pay for anything beyond my existing Claude subscription?: No. Harness Kit is free and open source under the Apache 2.0 license. All you need is Claude Code.

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