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external-agents

v0.2.1+codex.20260930042640

Ask external specialists through one policy-controlled gateway.

CodexAgent Plugins4 Skills1 MCP serverstdio

By Issei Matsuzoe0 GitHub starsUpdated 1 hour ago

Directory evidence

Runtimes
Codex and Agent Plugins
Parsed components
5 skill or MCP entries
Source updated
Sep 30, 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 external-agents for Codex

Installs for the current user
codex plugin marketplace add IsseiMatsuzoe/agent-skill-marketplace
codex plugin marketplace upgrade personal
codex plugin add external-agents@personal

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

Compatibility: the page URL and API slug “external-agents” remain stable.

  • Codex: external-agents@agent-plugin-marketplace → external-agents@personal

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/IsseiMatsuzoe/agent-skill-marketplace

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

Plugin files

plugins/external-agents/
├── .codex-plugin/plugin.json
├── plugin.json
├── skills/ask-claude/SKILL.md
├── skills/ask-external-agent/SKILL.md
├── skills/design-review/SKILL.md
├── skills/x-research/SKILL.md
└── .mcp.json

Included Skills4

ask-claudeskills/ask-claude/SKILL.md

Ask Claude for architecture, design, difficult reasoning or a second opinion. Use when the user requests Claude or an external specialist opinion would help an authorized task.

ask-external-agentskills/ask-external-agent/SKILL.md

Ask an external specialist for a useful second opinion, or fulfill a named request such as Gemini, Muse, Kimi, Qwen, DeepSeek, Claude or Grok through the common gateway.

design-reviewskills/design-review/SKILL.md

Review UI, visual design, screenshots or motion-design key frames against the user's goals or an accepted design. Typically uses Claude through the common external-agent gateway.

x-researchskills/x-research/SKILL.md

Research recent X discussions, developer friction, implementation examples, complaints, accounts and threads through Grok's search capability.

MCP servers1

external_agentsstdio
command
node
args
scripts/relay.mjs
cwd
.

Plugin manifests2

plugins/external-agents/.codex-plugin/plugin.json
{
  "name": "external-agents",
  "version": "0.2.1+codex.20260930042640",
  "description": "Ask external specialists through one policy-controlled gateway.",
  "author": {
    "name": "Issei Matsuzoe"
  },
  "skills": "./skills/",
  "interface": {
    "displayName": "External Agents",
    "shortDescription": "External reasoning, design review and X research.",
    "longDescription": "Four workflows use a common external-agent gateway. Local server setup and client authentication are required. Calls may incur provider charges.",
    "developerName": "Issei Matsuzoe",
    "category": "Productivity",
    "capabilities": [
      "Read"
    ],
    "defaultPrompt": [
      "Ask Claude for a second opinion.",
      "Review this screenshot.",
      "Research recent developer discussion on X."
    ]
  },
  "mcpServers": "./.mcp.json"
}
plugins/external-agents/plugin.json
{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "external-agents",
  "version": "0.2.1+codex.20260930042640",
  "description": "Ask external specialists through one policy-controlled gateway.",
  "author": {
    "name": "Issei Matsuzoe"
  },
  "repository": "https://github.com/IsseiMatsuzoe/agent-skill-marketplace",
  "extensions": {
    "com.openai": {
      "interface": {
        "displayName": "External Agents",
        "shortDescription": "External reasoning, design review and X research.",
        "longDescription": "Four workflows use a common external-agent gateway. Local server setup and client authentication are required. Calls may incur provider charges.",
        "developerName": "Issei Matsuzoe",
        "category": "Productivity",
        "capabilities": [
          "Read"
        ],
        "defaultPrompt": [
          "Ask Claude for a second opinion.",
          "Review this screenshot.",
          "Research recent developer discussion on X."
        ]
      }
    }
  }
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

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