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Metaharness

Metaharness is a TypeScript framework and generator that scaffolds focused, repository-aware AI-agent harnesses with an npx CLI, browser Studio, MCP server, memory, learning-loop components and witness-signed release support.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Metaharness — OpenViST project profile in Agent Frameworks.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Metaharness when a repository-aware, customized agent harness is more relevant than adopting a general-purpose agent framework. Its repository-scoring command is suited to an initial assessment before generation.

Who it is for

  • Developers creating custom AI-agent harnesses for repositories.
  • Teams that want project-scoped agent skills, commands, tools and memory.
  • Builders targeting Claude Code, Codex, pi.dev, Hermes, OpenClaw or RVM.

Documented uses

  • Generate a custom harness from a GitHub repository or blank slate.
  • Distribute a generated harness through a custom npx CLI.
  • Expose harness functionality through an MCP server.
  • Add project-scoped memory and learning-loop components.
  • Inspect a repository's harness fit before scaffolding it.
Before you choose

Requirements & limits

The project is available as a public MIT-licensed repository. The documented interfaces include the `npx metaharness` CLI and a browser-based Studio.

  • The project can generate a branded harness and custom npx command rather than only provide an agent runtime.
  • MCP support is explicitly included, while client-specific compatibility is not demonstrated in the supplied material.
  • The score command reads a repository without running it and provides pre-scaffolding information about fit, build likelihood, tool safety and rough run cost.
  • The implementation is TypeScript and names Claude Code, Codex, pi.dev, Hermes, OpenClaw and RVM as target environments or integrations.
  • The complete generator configuration and generated output structure are not specified.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Scaffold a harness from a repository using a template

List available templates and generate a harness named `my-bot` with the coding vertical template.

Before you start

  • Node.js/npm environment capable of running npx.

Steps

  1. Run the command below to view available templates.

    Documented command
    npx metaharness --list

  2. Run the command below to scaffold the harness.

    Documented command
    npx metaharness my-bot --template vertical:coding

Expected outcome

A `my-bot` harness is scaffolded using the coding vertical template.

Guide limitations

  • The source does not specify the full set of generator options or the generated directory structure.
  • The template description says shipped settings are default-deny; it does not detail how to configure them.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
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Sources checked
4 October 2026
Original website title
ruvnet/metaharness · Official homepage title · retained in its source language
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