agent-builder

v0.4.0

Standalone plugin companion for designing, evaluating, building, packaging, and deploying agentic harnesses, skills, and plugins with dual-format (Claude + AGENTS.md) output, polyglot scaffolding, repo structure, reusable skills, skill banks, and cross-host contracts

CodexClaude Code1 Skill

By Tyrone RossLicense: Apache-2.00 GitHub starsUpdated 2 months ago

Directory evidence

Runtimes: Codex and Claude Code
Parsed components: 1 skill or MCP entry
Source updated: Aug 19, 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 agent-builder 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 agent-builder@agent-plugin-marketplace

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

Compatibility: the page URL and API slug “agent-builder-2” remain stable.

Codex: agent-builder-2@agent-plugin-marketplace → agent-builder@agent-plugin-marketplace

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/tyroneross/agent-builder-studio

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

Plugin files

apps/agent-builder/plugin/

├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
└── SKILL.md

Included Skills1

agent-builderSKILL.md

Design, evaluate, or rebuild agentic harnesses — tool use, permissions, workflow state, memory, evals, observability, multi-agent, framework selection. Activates on harness-gap symptoms too.

Plugin manifests2

apps/agent-builder/plugin/.codex-plugin/plugin.json

{
  "name": "agent-builder",
  "version": "0.4.0",
  "description": "Standalone plugin companion for designing, evaluating, building, packaging, and deploying agentic harnesses, skills, and plugins with dual-format (Claude + AGENTS.md) output, polyglot scaffolding, repo structure, reusable skills, skill banks, and cross-host contracts",
  "author": {
    "name": "Tyrone Ross",
    "url": "https://github.com/tyroneross"
  },
  "homepage": "https://github.com/tyroneross/agent-builder/tree/main/plugin",
  "repository": "https://github.com/tyroneross/agent-builder",
  "license": "Apache-2.0",
  "productRole": "plugin-companion",
  "companionFor": "Agent Builder App",
  "keywords": [
    "agent",
    "harness",
    "architecture",
    "design",
    "evaluation",
    "multi-agent",
    "tools",
    "permissions",
    "memory",
    "observability",
    "langgraph",
    "crewai",
    "pydantic-ai",
    "smolagents",
    "dspy",
    "autogen",
    "skills",
    "skill-bank",
    "plugins",
    "codex",
    "claude",
    "deployment"
  ],
  "skills": "./",
  "interface": {
    "displayName": "Agent Builder",
    "shortDescription": "Plugin companion for designing, evaluating, and building agentic harnesses, skills, and plugins",
    "longDescription": "Standalone plugin companion for the Agent Builder app. It provides the cross-LLM skill, research synthesis, reusable templates, Prompt Builder prompt contracts, a Build Mode that scaffolds runnable skills/plugins with dual-format Claude SKILL.md + host-neutral AGENTS.md output and polyglot (Python/Rust/R/shell) script scaffolding, and an empirical catalog covering architectures, frameworks, memory substrates, lab patterns, local/open-source model agents, repo structure, reusable skill banks, skill chaining, and API/Claude/Codex deployment without requiring the local app.",
    "developerName": "Ross Labs",
    "category": "Coding",
    "capabilities": [
      "Read",
      "Write"
    ]
  }
}

apps/agent-builder/plugin/.claude-plugin/plugin.json

{
  "name": "agent-builder",
  "version": "0.4.0",
  "description": "Standalone plugin companion for designing, evaluating, building, packaging, and deploying agentic harnesses, skills, and plugins with dual-format (Claude + AGENTS.md) output, polyglot scaffolding, repo structure, reusable skills, skill banks, and cross-host contracts",
  "author": {
    "name": "Tyrone Ross",
    "url": "https://github.com/tyroneross"
  },
  "homepage": "https://github.com/tyroneross/agent-builder/tree/main/plugin",
  "repository": "https://github.com/tyroneross/agent-builder",
  "license": "Apache-2.0",
  "productRole": "plugin-companion",
  "companionFor": "Agent Builder App",
  "keywords": [
    "agent",
    "harness",
    "architecture",
    "design",
    "evaluation",
    "multi-agent",
    "tools",
    "permissions",
    "memory",
    "observability",
    "langgraph",
    "crewai",
    "pydantic-ai",
    "smolagents",
    "dspy",
    "autogen",
    "skills",
    "skill-bank",
    "plugins",
    "codex",
    "claude",
    "deployment"
  ]
}