A

Agent Harness

agent-harness-maintainers/harness · v0.13.0 · Development & Workflow

Coding-agent plugin that routes project work through goals, tasks, runs, evidence gates, and state sync via project adapters

InstallSourceFollow0

Is Agent Harness a fit?

From the plugin's manifest and HOL's scan. Anything the plugin does not declare is shown as not declared.

Works with

  • Codex
  • 4 skills

Before you install

Sign-in
Not declared
Declared access
Not declared
License
MIT

Check before relying on it

  • Security checks that did not finish: cisco-skill-scanner, codex-plugin-scanner. See the evidence

What is Agent Harness?

Agent Harness is a published development & workflow plugin for AI coding agents in the codex ecosystem, developed by Agent Harness Maintainers and distributed through the HOL AI plugin registry. Coding-agent plugin that routes project work through goals, tasks, runs, evidence gates, and state sync via project adapters

Canonical slug
agent-harness-maintainers/harness
Version
v0.13.0 · updated Oct 15, 2026

Trust & Reputation

HOL Trust Score
78

Factor Analysis

Per-metric points (0–100 each) combined via a weighted average into the overall score.

Installability
100pts
Maintenance
55pts
MCP Posture
100pts
Plugin Security
95pts
Provenance
70pts
Publisher Quality
75pts

Registry Snapshot

Project link
Agent Harness
Publisher verification
No
Marketplace source
Unknown
Scanner
Broker fallback
Security result
Partial scan
Digest verified
Yes
4 bundled skills — copy or download SKILL.mdOpen skills

Trust & reputation

Trust & Reputation

HOL Trust Score
78

Factor Analysis

Per-metric points (0–100 each) combined via a weighted average into the overall score.

Installability
100pts
Maintenance
55pts
MCP Posture
100pts
Plugin Security
95pts
Provenance
70pts
Publisher Quality
75pts

Provenance

Plugin root
plugins/agent-harness
Source repo
https://github.com/0xenzyme/agent-harness
Source commit
766cafa2f315…
Publisher verified
No
Owner verified
@0xenzyme

Continuous scanner CI not detected

This plugin remains listed. Its overall trust score is reduced by 10% because security checks are not maintained in the source repository's CI.

Optional: maintain the scanner in the source repository's CI to receive the full trust score. Listing does not require that change.

README badge not detected

Plugin owners can add the HOL badge to the repository README from Guard Plugins. Distribution, not security evidence. It adds a 2% engagement adjustment to the overall trust score and never changes the security result.

Partial scan
Security result
95
Score from finished checks
0
High findings

Some checks did not finish (cisco-skill-scanner, codex-plugin-scanner). No blocking issue was found in the checks that did finish, but this is not a passed scan.

Provider
registry-broker-fallback
Grade
A · safe
Version
Unknown
cisco-skill-scanner: unknown

Findings

lowoperational-securitysupply-chain.lockfile-missing

Repository snapshot does not include a lockfile.

infoskill-securityskill-scan.unavailable

Cisco skill scanner timed out after 60000 ms

infoskill-securityskill-scan.unavailable

Cisco skill scanner exited with code 1: Error loading skill: No SKILL.md and no .md files found in /tmp/hol-skill-safety-glBNbE (lenient mode requires at least one markdown file)

infoskill-securityskill-scan.unavailable

Cisco skill scanner timed out after 60000 ms

infoskill-securityskill-scan.unavailable

Cisco skill scanner timed out after 60000 ms

Agent Harness — Frequently asked questions

What is Agent Harness?
Agent Harness is an AI plugin in the HOL registry. Coding-agent plugin that routes project work through goals, tasks, runs, evidence gates, and state sync via project adapters
How do I install Agent Harness?
Install Agent Harness in your harness: Codex — codex plugin marketplace add 0xenzyme/agent-harness; Any agent — npx [email protected] add 0xenzyme/agent-harness. Full step-by-step guidance is on the HOL plugin page.
How do I install Agent Harness in Codex?
To install Agent Harness in Codex, start with codex plugin marketplace add 0xenzyme/agent-harness. The complete step-by-step install guide for Codex is on the HOL plugin page.
Is Agent Harness free?
Pricing for Agent Harness is published on its HOL plugin page when the maker schedules a launch.
How is the Trust Score for Agent Harness computed?
Agent Harness has a HOL Trust Score of 78 out of 100. The score is a weighted sum of six components from a static scan of the source, capped for high-severity findings and adjusted by two disclosed policies. Memberships and payments are not inputs, and a scan is not a safety guarantee. Full breakdown: https://hol.org/registry/plugins/agent-harness-maintainers%2Fharness/trust
Who publishes Agent Harness?
Agent Harness is published by Agent Harness Maintainers and listed on HOL.
Is Agent Harness available now?
Agent Harness availability is listed on its HOL plugin page.

Install Guidance

Install in Codex

Install through the Codex CLI plugin marketplace.

Codex plugin docs

Optional: install HOL Guard for Codex first, so it can check this plugin's tools on your machine before Codex uses them.

  1. 1

    Register the marketplace

    Run in any terminal. Codex reads the marketplace entry from .agents/plugins/marketplace.json (or the legacy .claude-plugin path) in the repository. If the repository ships none, add the generated entry from the Advanced section below first.

    shell
  2. 2

    Install from the Plugins browser

    Open Codex, open the Plugins browser, choose the marketplace registered by the previous command, and install harness.

  3. 3

    Check the marketplace is registered

    This confirms the marketplace source only. Confirm the plugin itself is enabled in the Plugins browser before relying on it.

    shell

Did setup work in Codex?

No setup reports for Codex yet. Self-reported by signed-in visitors. Copying a command is not counted, and most installs are never reported.

Attested installs: Fewer than 10 attested installs of this plugin in week 2026-W43, so no number is shown. Counted from opt-in HOL Guard install reports, once per machine and runtime, and never mixed with the answers above. How install reports work.

Loading reviews

Plugin Manifest

{
  "name": "harness",
  "version": "0.13.0",
  "description": "Reusable coding-agent harness for workflow-oriented project task control and adapter-driven execution. / 可复用项目任务控制与 adapter 执行工作流。",
  "author": {
    "name": "Agent Harness Maintainers"
  },
  "homepage": "https://github.com/0xenzyme/agent-harness",
  "repository": "https://github.com/0xenzyme/agent-harness",
  "license": "MIT",
  "keywords": [
    "coding-agent",
    "harness",
    "tasks",
    "goals",
    "workflow"
  ],
  "skills": "./",
  "interface": {
    "displayName": "Agent Harness",
    "developerName": "Agent Harness Maintainers",
    "shortDescription": "Orient, intake, initialize, and execute adapter-driven project work. / 定位、收集、初始化并执行 adapter 驱动的项目工作。",
    "longDescription": "Agent Harness bridges host runtime outcome, transient plan, session, and worker execution with durable fixed/adapter project control: authoritative Task/Goal state, repository Runs/DAGs, postflight state sync, gates, and evidence. zh-CN fallback: Agent Harness 把 host 的 runtime outcome、transient plan、会话和 worker 执行连接到持久化 fixed / adapter 项目控制,包括权威 Task/Goal 状态、repository Run/DAG、postflight 状态同步、gate 和 evidence。",
    "category": "Productivity",
    "capabilities": [
      "Project task control",
      "Host runtime outcome and plan bridge",
      "Postflight state sync",
      "Goal handoff",
      "Run preparation",
      "Loop engineering"
    ],
    "websiteURL": "https://github.com/0xenzyme/agent-harness",
    "privacyPolicyURL": "https://github.com/0xenzyme/agent-harness/blob/main/plugins/agent-harness/PRIVACY.md",
    "termsOfServiceURL": "https://github.com/0xenzyme/agent-harness/blob/main/LICENSE",
    "composerIcon": "./assets/icon.svg",
    "logo": "./assets/logo.svg",
    "screenshots": [
      "./assets/screenshot.png"
    ],
    "defaultPrompt": [
      "Use harness:orient to inspect durable state and choose host-direct, host-direct-postflight, or durable-harness. Prefer native runtime outcome and transient plan when the host exposes them."
    ]
  },
  "holManifestOrigin": "repository",
  "registryIndexVersion": 5
}

Marketplace Source

Repo URL
https://github.com/0xenzyme/agent-harness
Marketplace path
Unknown
Source path
plugins/agent-harness
Install policy
Unspecified

Skills

4 SKILL.md files ship with this plugin. Preview, copy, or download each one, then install them with the Skills CLI.

Share
skills-cli
  • execute

    skills/execute/SKILL.md

    Execute accepted long-running controller or durable Harness work, or postflight-sync already tracked work; ordinary clear changes use the current host directly. / 执行主控长任务、持久化控制或已有状态同步。

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • init

    skills/init/SKILL.md

    Explicitly audit, initialize, import, or repair Agent Harness setup and config migration; not for ordinary status, intake, or product implementation. / 显式接入、迁移或修复 Harness。

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • intake

    skills/intake/SKILL.md

    Explicitly preview or record rough Agent Harness ideas, requirements, bugs, and inbox notes without accepting scope or implementing it. / 显式收集未确认事项,不执行。

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • orient

    skills/orient/SKILL.md

    Inspect durable Agent Harness state and recommend the next public entry without mutation. Use for status, blockers, stale artifacts, or route questions. / 只读检查持久化状态与下一入口。

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

File Inventory

.codex-plugin/plugin.json

plugin-manifest

2,018 bytes

e889631a2991fd95…

assets/icon.svg

asset

748 bytes

795fdaebc5e590ed…

assets/logo.svg

asset

1,167 bytes

f63cd8e8d83495f2…

assets/screenshot.png

asset

182,816 bytes

75584a9ca477eb70…

README.md

file

1,937 bytes

57591adc9f67a181…

SECURITY.md

file

617 bytes

2120c3ea582103e4…

skills/execute/agents/openai.yaml

skill

414 bytes

cd89f28b53052373…

skills/execute/references/completion-evidence.md

skill

1,438 bytes

c5763ebcf3019eaf…

skills/execute/SKILL.md

skill

13,672 bytes

492abc5f8b19de34…

skills/init/agents/openai.yaml

skill

242 bytes

47db1add784b72ab…

skills/init/references/setup-migration-safety.md

skill

557 bytes

048d86d7a50e0f76…

skills/init/SKILL.md

skill

2,004 bytes

69465bb2c722578e…

skills/intake/agents/openai.yaml

skill

241 bytes

ba8623cedcd49596…

skills/intake/references/capture-promotion.md

skill

630 bytes

bce88f263142b183…

skills/intake/SKILL.md

skill

1,765 bytes

b2563b115022eaf4…

skills/orient/agents/openai.yaml

skill

266 bytes

2da2f48289550b02…

skills/orient/SKILL.md

skill

3,480 bytes

35df226268c4f0fe…

History, reviews, and alternatives

Launch history

No public launch record yet.

User reviews

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The first substantive review can be added on this page.