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harness-maker

v0.58.0

Per-project AI coding harness for Claude Code, Cursor, and Codex. Bundled hm-make and hm-update skills connect native Codex plugins to a matching Python engine and project generation.

CodexClaude Code2 Skills

By noelLicense: MIT4 GitHub starsUpdated 3 days ago

Directory evidence

Runtimes
Codex and Claude Code
Parsed components
2 skill or MCP entries
Source updated
Sep 21, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install harness-maker for Codex and Claude Code

Installs for the current user
codex plugin marketplace add IchenDEV/agent-plugin-mkt
codex plugin marketplace upgrade agent-plugin-marketplace
codex plugin add harness-maker@agent-plugin-marketplace

Paste and run these commands in a terminal with Codex. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/Ecro/harness-maker

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The repository root is the plugin root.

Plugin files

harness-maker/
├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
├── skills/hm-make/SKILL.md
└── skills/hm-update/SKILL.md

Included Skills2

hm-makeskills/hm-make/SKILL.md

Set up a project's harness from the installed Codex plugin, using its matching Python engine and generating Codex agents and workflow skills.

hm-updateskills/hm-update/SKILL.md

Update the installed harness-maker Codex plugin, its matching Python engine, and the current project's generated harness while preserving user configuration.

Plugin manifests2

.codex-plugin/plugin.json
{
  "name": "harness-maker",
  "version": "0.58.0",
  "description": "Per-project AI coding harness for Claude Code, Cursor, and Codex. Bundled hm-make and hm-update skills connect native Codex plugins to a matching Python engine and project generation.",
  "author": {
    "name": "noel"
  },
  "license": "MIT",
  "homepage": "https://github.com/Ecro/harness-maker",
  "repository": "https://github.com/Ecro/harness-maker",
  "keywords": [
    "codex",
    "claude-code",
    "cursor",
    "harness",
    "autoloop",
    "anti-rot",
    "code-review",
    "consensus",
    "block-merge",
    "worktree",
    "observability",
    "anthropic"
  ],
  "skills": "./skills/",
  "interface": {
    "displayName": "Harness Maker",
    "shortDescription": "Project harness setup and updates for Codex",
    "longDescription": "Per-project AI coding harness for Claude Code, Cursor, and Codex. Bundled hm-make and hm-update skills connect native Codex plugins to a matching Python engine and project generation.",
    "developerName": "noel",
    "category": "Developer Tools",
    "defaultPrompt": "Set up or update this project with harness-maker.",
    "capabilities": [
      "skills"
    ]
  }
}
.claude-plugin/plugin.json
{
  "name": "harness-maker",
  "version": "0.58.0",
  "description": "Per-project AI coding harness for Claude Code · Cursor · Codex. Profiler + 10-dim interview build a different harness for every project.",
  "author": {
    "name": "noel"
  },
  "license": "MIT",
  "homepage": "https://github.com/Ecro/harness-maker",
  "repository": "https://github.com/Ecro/harness-maker",
  "keywords": [
    "claude-code",
    "harness",
    "autoloop",
    "anti-rot",
    "code-review",
    "consensus",
    "block-merge",
    "worktree",
    "observability",
    "anthropic"
  ]
}

For maintainers

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[harness-maker on Agent Plugins Marketplace](https://pluginsmp.com/plugins/harness-maker)