open-harness

Skill · npm · ★ 620 · graded 2026-10-24Source linked

A code-first, composable SDK to build powerful AI agents

No outside reports on file

open-harness is distributed via npm (@openharness/core); review its source code, dependencies, and requested permissions before use.

Based on public adoption and transparency signals as of Oct 24, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

Local filesNo local folder access notedLOW
Command executionRuns shell or system commandsREVIEW
Network reachConnects to outside service APINOTED
CredentialsNo API token requiredLOW
Package sourcenpm (@openharness/core)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

npx -y @openharness/core

All setup options ↓

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About Open Harness

Open Harness is an agent skill focused on Developer tools: A code-first, composable SDK to build powerful AI agents.

It is published on npm as @openharness/core and hosted on GitHub at MaxGfeller/open-harness (620 GitHub stars, 132 weekly npm downloads). Based on its public metadata, it operates with standard local or API scope without broad shell execution flags noted.

Setup

Check these steps against the project’s own instructions before running anything.

Install the npm package @openharness/core with post-install scripts disabled:

bash

npm install --ignore-scripts @openharness/core

Review the upstream instructions at https://github.com/MaxGfeller/open-harness (opens external site) before enabling in your agent workspace.

Why this grade

BB — Some risk signals

Signal-based grade (4/7 points): well starred on GitHub, listed in several sources, public source code. This reflects adoption and transparency, not a code review.

Popularity and upkeep

49/100

GitHub stars: 620
Weekly npm downloads: 132
Listing last refreshed: 2026-10-28

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Security reports

No reports found for this package in our research (last checked 2026-10-29).

Check a specific version →

Risks to watch for

Dependency & version pinning: Distributed via npm (@openharness/core). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.

How to lower the risk

Least-privilege permissions

Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.

Network isolation

Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
If your IT team can, limit which websites and services it is allowed to contact.

Monitoring

Check its activity history or logs weekly at first, and look at what it changed or sent.
Turn on alerts for new logins or unusual usage on any account it connects to.

Red flags to watch for

It asks for more access than its job requires, or prompts you to paste passwords.
It suddenly updates with new owners, or starts contacting unfamiliar websites.

Questions

How do I install Open Harness?

Install Open Harness with npm install @openharness/core or run it directly with npx -y @openharness/core. For agent integration and configuration flags, see the documentation at github.com/MaxGfeller/open-harness. Pin an exact version and pass --ignore-scripts if you want to block post-install hooks.

Are there security reports about Open Harness?

No reports found for this package in our research (last checked 2026-10-29). Open Harness currently holds Grade B (Some risk signals) based on public adoption and transparency signals. Key risk areas to watch include dependency & version pinning:.

Is Open Harness actively maintained?

Open Harness has 620 GitHub stars and 132 weekly npm downloads. Our directory data was last refreshed on 2026-10-28. Check recent commit activity, release tags, and open issues at github.com/MaxGfeller/open-harness before pinning it in production.

What are alternatives to Open Harness?

Compare Open Harness side by side with similar skills in the Related tools section on this page, or browse all skills on AgentArmorHQ.

Maintain or use Open Harness? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

AgentArmorHQ Risk Grade B for Open Harness

GitHub README Markdown:

markdown

[![AgentArmorHQ Risk Grade for Open Harness](https://agentarmorhq.com/api/badge/maxgfeller-open-harness)](https://agentarmorhq.com/skills/maxgfeller-open-harness)

HTML embed:

html

<a href="https://agentarmorhq.com/skills/maxgfeller-open-harness"><img src="https://agentarmorhq.com/api/badge/maxgfeller-open-harness" alt="AgentArmorHQ Risk Grade for Open Harness" height="20" /></a>

Terminal check:

terminal

curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "maxgfeller-open-harness"

Share with your security lead

Need sign-off to use open-harness? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: open-harness
- **Listing URL:** https://agentarmorhq.com/skills/maxgfeller-open-harness
- **Type:** AI agent skill
- **Risk Grade:** Grade B (Some risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 620 GitHub stars, 132 weekly npm downloads

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** Runs shell or system commands
- **Network reach:** Connects to outside service API
- **Credentials:** No API token required
- **Package source:** npm (@openharness/core)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts @openharness/core`
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 24, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type: AI agent skill
Publisher: MaxGfeller
Source code: github.com/MaxGfeller/open-harness
Install command: npm install @openharness/core
Est. context load: ~50 tokens idle · ~450 tokens when active (on-demand skill)
Popularity: 620 GitHub stars, 132 weekly npm downloads
Last updated: 2026-10-28
Last graded: 2026-10-24

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